Bolted Insights

Your essential gateway to bolting knowledge and industrial trends around the world

Bolted Insights

Your essential gateway to bolting knowledge and industrial trends around the world

Nord-Lock Group Insights

Latest content

A Pin Upgrade for Kafril Group’s Hitachi Demolition Excavator (‘Beast of the East’) See how Kafril Group upgraded their Hitachi Demolition Excavator with Expander System pivot pins to minimize wear and stay competitive. Read More
Improving Wind Farm Performance: A Guide to Monitoring Preload in Bolted Joints Expand the possibilities of structural maintenance and infrastructure design with Superbolt and remote preload monitoring  Read More
Why Heavy-Duty Vehicles Choose Expander System Pivot Pins Discover the financial benefits of reduced maintenance and repairs, and read a case study of Offroad Leichtbau Manufaktur's use of Expander System in extreme off-road conditions Read More
Bolt Maintenance with Huge Potential – how Nord-Lock Group works with Hydropower MRO Solve coupling alignment, secure bolts and mitigate the risks of extreme vibrations with Nord-Lock Group’s expertise in hydropower and turbine bolt maintenance. Read More
EDF Hydropower and Superbolt Tool: Bolt Maintenance with Huge Potential Maintaining a G5 Pelton wheel at EDF La Coche, one of Europe's largest hydroelectric production units. Read More
Superbolt’s Culture of Innovation and All Eyes On Smart Bolting From an industrial fix to a global brand synonymous with multi-jackbolt tensioning, and now predictive maintenance with digital bolting. Read More

Bolting Tips

Durable Bolted Joints in Steel Construction Nord-Lock's steel construction experts share vital experience and knowledge to achieve durable bolted joints for steel structures. Read More
How Much Force is Required to Tighten a Bolt? You can use the weight of heavy animals to understand the exponential torque force required to tighten larger bolt sizes Read More
The Experts: Can I Use Nord-Lock Wedge-Locking Washers on Painted Surfaces? Nord-Lock wedge-locking washers are an effective bolt securing method for use on coated surfaces in offshore industries Read More
When NOT to Use a Wedge-Locking Washer Nord-Lock engineers highlight niche examples of when wedge-locking washers are not a suitable method to secure bolted joints. Read More
What to consider when reusing bolted joints? A bolt is installed in a factory without lubrication and everything works fine… until the first time the bolt is removed and reused. Then the problems start. Why? Read More
3 Tips to Choose the Right Bolt Securing Solution Do you work with planned maintenance? Are you seeking a solution that will prevent bolt loosening in your applications? Depending on the application, bolt loosening can have profound consequences b... Read More
What Are the Thermal Effects on Preloaded Joints? Due to temperature variations, parts and fasteners expand or contract with various amplitudes depending on rate of temperature change, the mass and size of parts, conductivity of metals, and the coefficient of expansion of each individual materials. Read More
What Is the Load Transfer Factor? When utilizing hydraulic bolt tensioners to induce a controlled preload into a bolted joint, several key factors including load transfer factor need to be examined. Read More
What Is the Relationship Between Torque, Preload and Friction? One of the main methods to preload a bolt is to apply a torque on its head. This is a very common process in the industry, however it is not easy to control accurately. Read More
What Is the Difference Between a Straight Pin and Expander System? Pivot pins are located on cylinder rod ends and between moving mechanical parts. But what how does Expander System work differently from a traditional pivot pin? Read More
The Experts: The making or breaking of bolted joints What is Hooke’s Law and why is it crucial to bolted joints? Hooke’s Law relates to the accurate tightening of bolted joints. When examining a bolt’s behaviour, the axial force is plotted against th... Read More
Top Tips from the Bolting Expert Japan’s foremost expert in bolting and author of 'Bolted joint engineering' - Doctor Tomotsugu Sakai - shares his insights about bolt fastening Read More
Best Way to Improve Fatigue Resistance of a Bolted Joint The fatigue capacity of a bolted joint is very small, as compared to its static capacity. To improve fatigues resistance, we look into ways to reduce alternating stresses at the threads. Read More
The Experts: Understanding the markings on nuts and bolts Bolt heads and nuts are often marked with numbers, letters, dashes, slashes, dots, or an assortment of other marks. What do they mean? Read More
Can I use Nord-Lock stainless steel washers with steel bolts? When designing a bolted joint, there are several aspects to consider. Find out what to take note of materials to use for parts of the joint. Read More
Preventing galling and seizing in bolting Galling is caused by a combination of friction and adhesion between metallic surfaces during sliding. In extreme cases galling leads to seizing. Read More
How to Optimize a Bolted Joint Through Clamped Length? Clamped length is the free length of a bolt that is stretched under tension. Find out what is the optimal bolt length that you should consider. Read More
When and Why Do You Need Lubrication During Tensioning? Proper use of lubrication is crucial to safeguarding repeatable and precise preload control in bolt tensioning. What should you pay attention to during lubrication? Read More
What Are the Key Advantages of Hydraulic Tensioners?  What are the key advantages of hydraulic tensioners? Read More
The Experts: Getting the most out of fasteners Before you re-use bolts, you should always consider the security level of the assembly and economic factors. Read More
Why does torque vary when tightening and untightening? Why is the untightening torque lower than the tightening torque when tightening a bolt or nut? Read More
The Experts: Picking up the slack Why is slackening becoming an increasing problem? Read More
The Experts: Why do Superbolt multi-jackbolt tensioners prevent loss of preload? Superbolts have been used in numerous demanding bolting applications with extreme working loads and high vibrations. What mechanical principle of Superbolts prevent loss of preload? Read More
How to determine a suitable tightening torque I don’t know the tightening accuracy of my tool. How should I proceed with my torque calculation? Read More
Can I Use an Additional Locking System with Nord-Lock Washer? Other specialised locking systems, including prevailing nuts and adhesives, are not advisable and would not add any benefits to the joints. Read More

Videos

Video: Get to know Expander System
Video: When Safety Really Matters
Video: Bolt Behavior and Its Elastic Limits
Video: How Does the Nord-Lock Washer Work?
Video: Installing Ezfit Mechanical Expansion Bolts
Video: Boltight Typhoon bolt tensioners
Video: Boltight easy piston retraction pump
Video: Irish Rail safely secured with Nord-Lock washers
Video: Hydraulic tensioners for compact flanges
Video: Tightening Boltight multi stud bolt tensioners
Video: Installing a Boltight hydraulic bolt tensioner
Video: Boltight subsea hydraulic bolt tensioners
Are Nord-Lock Wedge-Locking Washers Reusable?
Video: How multifunctional wedge-locking works?
Video: Verifying the Locking Function of Nord-Lock Washers
Video: Nord-Lock Washers in the Junker Vibration Test
Video: Introduction to Superbolt Ezfit Mechanical Expansion Bolts
Video: Superbolt Multi-Jackbolt Technology
Video: ActSafe trusts the proven quality of Nord-Lock washers

Knowledge

Dinghan Railway Technology Relies on Nord-Lock Vibrations, dynamic transverse forces, and high speeds require the highest safety standards in railway fasteners Read More
Electrification in Mining - Sparks of a Low-Carbon Future Mining is crucial to build green technologies, but the industry itself must decarbonize to meet global sustainability targets. Read More
The Obvious Business Case for Sustainability Sandvik's Head of Sustainability talks about making the shift towards a circular business model Read More
What do I need to know about the Circular Economy? An introduction to the circular economy, circular design, closed looped systems and potential new business models Read More
Making It Circular: Mining Machines and Manganese Steel Sandvik Rock Processing Solutions operates one of the world’s most sustainable manganese steel foundries, where circular design is part of the business model. Read More
Bridge Design and Industry 4.0 Industry expert Professor Raid Karoumi explores how automation and smart technologies will affect the future of bridge design, inspections and maintenance. Read More
Bridge Repair Like Open-Heart Surgery Safety and security were top priority during essential maintenance to the Emmerich Rhine bridge, a busy thoroughfare that remained open to traffic while bolted connections were replaced. Read More
From a blank paper to a new generation coupling bolt Steve Brown started his career working with coupling bolts for a company in his hometown outside Manchester in the UK. 30 years later, he has come full circle with the design of a new generation co... Read More
Boltight TSR+ Sometimes you know that a very good solution can be further improved. But actually figuring out how to make a good product great can be difficult. Here’s how the faster, safer and more robust Bolti... Read More
The path to Green Steel The production of steel is one of the world’s major polluters. With the ever-sharper focus on the climate crisis and sustainability, things had to change. And they are, through innovations and circular thinking. But it’s a long road that will require new thinking throughout the product life cycle, from design to end-of-life solutions. Read More
Offshore floating wind energy Imagine producing 11 times more electricity than the entire world needs, using only offshore wind turbines. This may well be possible, reports the respected International Energy Agency, IEA. Read More
A viable solution that can end lug wear In many industries, lug wear is simply accepted as an unavoidable fact of life. But does it need to be? Could the Expander System offer a viable solution? Read More
Common Bolt Locking Methods When choosing a method for preventing bolts from loosening in an assembly there are many different options. One needs to assess the risk of joint failure and the dynamic loads the joint will meet d... Read More
Impact of Extreme Temperatures on Metallic Materials There are dozens of bolting and fastening applications that may involve extreme temperatures. It is important to consider the effects these temperatures will have on the metals being used. Read More
Getting Smart with Superbolt Nord-Lock Group has developed a smart preload monitoring technology, taking the Superbolt Multi-Jackbolt Tensioners (MJTs) to the next level. Read More
Get Smart: The Future of Industrial Automation Is Here Connected machines, components, and systems are creating intelligent networks that can control each other autonomously. How do we adapt in the manufacturing industry? Read More
The Holy Grail of Jackbolt Tensioning Since the launch of the Superbolt Multi-Jackbolt Tensioner (MJT) in 1984, efforts have been made to constantly improve efficiency. Read More
Opportunities in the CIS mining industry Higher commodity prices, lower inflation and an ongoing recovery in the still-shaky Russian economy are fuelling a similar recovery in other CIS countries, in the process opening new opportunities... Read More
Reliability Is The Key To Running A Successful Railway Expander System pivot pin is the permanent solution to lug wear for moving mechanical parts and rod ends. This ensures reliability in the operation and safety of the railway industry worldwide. Read More
Bolt loosening due to vibration. Stop loosen bolts. Why Do Bolts Loosen? Bolt loosening can have profound consequences. One loose bolt can bring a whole production plant to a standstill, while in other applications loose bolts can pose a significant safety hazard. So, what are the main causes of bolt loosening? Read More
How Bolts Are Made? Here Is the Manufacturing Process Bolts can come in a wide range of different sizes and shapes, but the production processes may vary depending on how advanced the bolt designs are. Read More
The History of the Bolt When were the first bolts made and what were they used for? Nord-Lock Group traces the history of the bolt, from ancient Egypt through to modern day bolts & screws. Read More
Safely Securing Connections in Structural Steel Steel is one of the most commonly used materials in commercial and industrial building construction as it provides high design flexibility. Read More
Thread Standards: The Search for a Red Thread Let's explore the history, the evolution and the future of these crucial but often overlooked thread standards. Read More
Hydraulic tensioning or torquing - that is the question Which is the best method for controlled tightening of a bolted joint? Bolted plays hydraulic torquing off against hydraulic bolt tensioning. And the winner is… Read More

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EDF Hydropower and Superbolt Tool: Bolt Maintenance with Huge Potential Maintaining a G5 Pelton wheel at EDF La Coche, one of Europe's largest hydroelectric production units. Read More
Staying on Track with Wedge-Locking Washers Spare-time drag racer Sam Retke uses Nord-Lock wedge-locking washers to prepare a 1984 VW for racing. Read More
A Secure Bolt Locking Method for Agricultural Drones Unmanned Aerial Vehicles (UAVs) are one new technology that plays a critical role in modernizing China's agricultural sector. Read More
Vegas High Roller: Securing a 168m Tall Ferris Wheel Boltight hydraulic tensioners secure the brace leg, securing Vegas High Roller against strong winds and seismic activity Read More
The Reciprocating Compressor - An Oil & Gas Workhorse Kobe Steel uses Nord-Lock washers as well as Superbolt and Boltight series products to build secure compressors Read More
Secure machinery for the toughest forestry harvesting Find out how this global supplier of forestry grapple harvesters builds robust and flexible machinery that will survive even the toughest of forest harvesting. Read More
Corrosion Resistant Washers Perfect to Secure Marine Fenders Nord-Lock wedge-locking washers provide a secure bolting solution to the South Korean shipping infrastructure, tightening marine fenders braced for impact. Read More
Expander System pivot pins perfect for complex bridge design Custom Expander axles secure critical pivot joints, giving precision and reliability to raise/lower the Hisings Bridge in Sweden for ships to pass underneath. Read More
subperbolt-ezfit Ensuring alignment on hydropower turbines Coupling alignment is key for the smooth operation of hydropower turbines, however, many plants are forced to schedule frequent maintenance due to misalignment. When a hydropower plant in Vietnam w... Read More
Rebuilding the Genoa bridge Safety is always the major consideration in bridge construction, but the circumstances of the Genoa project underscored its absolute priority for PERGENOVA. Suppliers and sub-contractors were chosen based on stellar credentials, but also competitive cost and speed of implementation. Read More
Expander system ensures long-life for excavators We all expect our roads to be smooth, our pavements unrutted, to have running water, electricity, gas, and telecommunications in our homes and offices and yet many of us probably pay little attenti... Read More
Increasing the capacity of Benteler Arena Fan safety in football stadiums has come a long way in recent decades, yet collapses and accidents still occur. Read More
Providing safety in huge steel constructions When durability and safety are absolutely critical in a construction project, small things like washers can have a huge impact. Read More
Taking a weight off your shoulders Braving the elements and getting close to Nature can be an enlightening experience, especially for children. But proper planning is crucial. Read More
An innovative solution for a special bridge 140 meters in length, 45 meters wide and 3,400 metric tons heavy. And gold coloured. The new bridge in Stockholm is definitely set to be a new landmark in Sweden’s capital city. Read More
Imagining the successful solution in your mind Like a winning athlete, can a maintenance manager see the perfect fix in his mind before actually doing it? Japan Steel Works might have the answer. Read More
Securing Bolts in Outer Space The upper atmosphere can be tough on equipment. Developing a rocket engine for this environment is a huge challenge. If there are complications in the process, the engine and its associated parts might be damaged. Read More
Ensuring Safety in Car Racing The Korean Formula Student Competition (KSAE) allows engineering students to design and race their own cars - putting their engineering skills to the test in a real-life environment. Read More
Expander System Keeps Municipal Projects on Track A simple solution using the Expander System fixed a costly and time-consuming problem. Read More
A Wind-Win Situation Wind turbine towers are designed to flex and bend, which helps them dissipate the significant forces being exerted upon them. However, this had been causing dangerous failures in the bolts. Read More
Solving a Pressing Issue with Superbolt Tensioners From hydropower generation facilities to bookbinding press, the usability of Superbolt multi-jackbolt tensioners transcends across different types of applications to keep bolted connections firmly together. Read More
The Safest Truck Fleet in Europe EDEKA Südbayern takes the initiative to ensure truck safety. Using Nord-Lock wheel nuts, they are securing their fleet of over 300 trucks and 475 truck drivers' lives in southern Germany. Read More
Securing Giant Satellite Antenna Radomes in Antarctica Antarctica is one of the coldest and windiest places on earth. These conditions put an extreme amount of pressure on bolted connections to be secured properly. Read More
A Simple Solution for an Advanced Machine With the world’s appetite for LCD displays seemingly insatiable, Hyundai Robotics’ LCD handling machines are in high demand from LCD manufacturers. Read More
Getting the best of both worlds On the face of it, building the Kienlesberg bridge was a real-life mission impossible. After all, how can you successfully bring together two completely opposing concepts? Read More
Reducing lug wear once and for all Earthworks contractor, Blackwell, supplies all the mining equipment at House of Water, one of the last remaining surface coal mines in the UK. Read More
Alstom and Nord-Lock Group: A secure coupling French multinational Alstom is a global player in the rail transport industry with a raft of international customers seeking the most comprehensive range of products and services on the rail market. Read More
Saving time and money by using the right wheel nuts Holzwerke Ladenburger is one of Europe’s largest suppliers of wood products for the building industry, producing 800,000m3 of timber products every year. They had to retighten their wheel nuts ever... Read More
When the going gets tough Off-road vehicles are built to handle what would break most cars and trucks. Whether driving through mud or racing up a mountainside, these vehicles need state-of-the-art technology to stay in top condition. Read More
Pushing the boundaries of express trains The central Japan railway Company (JR Central) operates the Shinkansen superexpress bullet trains that connect Tokyo and Osaka – Japan’s two biggest cities. Read More
Steering pins replaced fast The challenge A mining company in Canada needed a better solution for replacing the steering pins on its fleet of one hundred Komatsu trucks. With the traditional method, replacing the pins took aro... Read More
Washers reduce costs in propeller assembly Mecklenburger Metallguss GmbH, a world leader in the production of propellers for large container ships chose Nord-Lock as the new standard for all bolted joint applications Read More
Safe and Effective Wind Turbine Maintenance Nearly two years ago, US company All Energy Management (AEM) began developing retrofits and training companies that service a fleet of 1,000 wind turbines in the UK, the US, Canada and Italy. Read More
SpaceX competition winners chose wedge-locking washers In 2015, Elon Musk, the billionaire behind the futuristic transport technology companies Tesla and SpaceX, launched the Hyperloop Pod Competition. Read More
Washers triple-protect nuclear transports Daher Nuclear Technologies GmbH, located in Hanau close to Frankfurt am Main, Germany, develops containers for transportation of radioactive substances. For obvious reasons, these containers must b... Read More
Cheaper but Better Solution for Tractors With Washers Early in 2017, when Hattat Traktör was testing a new tractor model, they realized that the joints on the air compressor–engine connection bracket were loosening because of vibration. Read More
Customized washers keep KTM motorcycles in the race | Nord-Lock Group Pick any of the world’s most exciting motor races and you will find the orange motorcycles by KTM, Europe’s largest manufacturer, among the top contenders. Read More
Hydraulic Tensioning Tool For Nuclear Reactor Pressure Vessel Doosan Heavy Industries & Construction required a bolt tensioning solution to tighten nuclear reactor pressure vessel stud bolts. Read More
Creating big opportunities for Expander System distributor Viggo Bendz has started supplying Stena Recycling with the Expander System for their grab machines - a potentially lucrative development for a small independent operator. Read More
Bespoke Bolt Tensioners Secure Deep-Water Pipelines Boltight supplies tailormade bolt tensioning equipment for structural split repair clamps to Subsea Innovation in the UK. Read More
Focus on security in windy and vibrating environment Dutch company Akkadia manufactures specialist CCTV systems for demanding situations in various industries. Its cameras can be found everywhere, from offshore, to polar regions and deserts. Read More
Nord-Lock Group keeps the railway industry on track Nord-Lock wedge-locking washers are used in all safety-related areas of the railway industry, such as bogies, coupling devices, brake systems, rail dampers. Read More
Washers keep airplanes in the air Look up into the sky in the coastal city of Miri, in north-eastern Sarawak, Malaysia, and you may see Nord-Lock washers in action: inside a radio-controlled aircraft. These hobby airplanes are sold by Byond Horizon, a business that otherwise uses drones to take aerial photos and videos for companies. Read More
No downtime with innovative Expander System pivot pins Rambooms Oy is a global supplier of breaker boom systems to crusher manufacturers and mines. Based in Finland, its products are used to break oversized rocks. Read More
Converting Sea Wave Motion Into Energy With oceans covering more than 70 per cent of the earth’s surface, wave power is potentially a huge untapped source of renewable energy. Read More
Renovating Nuremberg’s metro – without affecting the timetable Renovating an underground railway system without weeks of construction and chaos caused by delays and diversions was previously unheard of. Read More
Quadrupled machine life and thousands of dollars saved The Yanacocha Mine in Northern Peru is one of the largest gold mines in the world. As in any industry, downtime means lost productivity and – as a result – lost money. Keeping the operations running is always of the utmost importance. Read More
Expander System saves a day of work Gamleby Forest is a logging company with a number of harvesters in their fleet. Read More
Pressing problem solved with Superbolt Superbolt tensioners secure Sodick's moulding machines allowing to control the force on the joints and guaranteeing optimal performance of the machines. Read More
New Horizons With the Expander System Boskalis has chosen Expander System as their supplier of pivot pins for one of their biggest dredgers – backhoe dredger Baldur. Read More
Tightened Just Right In a 2006, American Bridge and Fluor got the assignment to build the new eastern span of the San Francisco–Oakland Bay Bridge, the largest public works project in California’s history. Read More
Swivel shackle with impressive lifting power The Swivel Shackle Giga DSS from Codipro incorporates a Superbolt tensioner. This is the most efficient lifting ring ever made and can handle turning loads. Read More
Looking deep into the stars The Large Binocular Telescope (LBT) on Mount Graham in Arizona, USA, is already one of the world’s most advanced optical telescopes. It consists of two 8.4-meter primary mirrors on a common mount s... Read More
Green technology for sustainable land clearing Mulching machines are exposed to extreme vibration. Extending their life cycle and sharpness of the teeth is vital for sustainable land clearing. Read More
The wind turbine time machine With the sector growing globally every year, the wind energy industry is looking to use less material for producing big wind turbine parts. Read More
Expander System passes 50 000h of testing with flying colors The Expander System was field tested in the steering cylinder position on Volvo BM 4300 wheel loaders through four machine lives in Sweden over a period of six years. Read More
Full trust in Expander from the first installation Swedish company Maskinia is a general agent for some of the world’s leading machine manufacturers. Read More
Washers safeguard transport safety To avoid accidents that would put people and the environment in harms way, it is crucial that the transport of liquids is managed safely and efficiently. Read More
On site, offshore, under pressure Dutch company Heat Solutions on Site BV (HSOS) is a leading service provider in the metal sector. Their services include heat treatment and machining on site. Read More
Securing bridges over cooling water The Port of Rotterdam (Netherlands) receives every year the visit of around 35,000 seagoing vessels and 130,000 inland vessels. This makes the Port of Rotterdam the largest port in Europe and third... Read More
Taking wind energy to new depths Offshore wind turbines are an increasingly common sight as the world moves towards more sustainable forms of energy production. Read More
Fusion Power Swiss Plasma Center's problems with vertical, horizontal and axial vibrations are solved with the installation of Superbolt expansion bolts. Read More
Putting the X-series to the test The Challenge Wam Metals is a manufacturer and supplier of a wide range of specialized non-ferrous and ferrous components, servicing both the local South African and the international markets. The... Read More
Superbolt tensioners secure slurry pump cover Two sets of hydraulic wrenches were used previously, with one used to achieve 21,000 lb•ft (28,470 Nm) on the 16 perimeter bolts and another used to achieve the 35,000 lb•ft (47,450 Nm) for the cut water bolt. Read More
Towering challenge for a giant crane Challenges are nothing new to Terex Tower Cranes, an Italian-based manufacturer of cranes for construction and industrial use founded (as Comedil S.r.l) in 1962. Read More
Innovative wind turbine maker gets peace of mind with Nord-Lock Quality and durability are Eastern Wind Power’s top priorities for its 50kW vertical axis wind turbines. Read More
China: Opportunities on the coal market Xi’an Coal Mining Machinery has approved Nord-Lock washers and Superbolt tensioners as specialised components for its shearers and roadheaders. Read More
Ecuador's new power Ecuador already meets 45 percent of its energy needs with hydroelectric power, but is aiming to increase this to 93 percent by 2016. Read More
Superbolt tensioners secure Tata Steel’s BOS converters The Tata Steel’s Port Talbot Basic Oxygen Steelmaking (BOS) plant in South Wales produces some 4.5m tonnes of strip steel a year, making it one of the largest plants in Europe. Read More
Tensioners on Alcoa 50,000-ton press When Alcoa decided to redesign and rebuild their iconic 50,000 ton press located in Cleveland, OH, they contacted Superbolt to design specialty tensioners that could handle the demanding bolting requirements. Read More
A charge from the Alps Backdropped by the Alps, a Swiss power plant has solved the problem of storing electricity. Read More
Safety secures trust For more than 30 years, unsurpassed safety has been synonymous with the Nord-Lock Group. Read More
Powerful circles Nord-Lock enlarged external diameter wedge locking washers make the connections on a circular storage unit for lignite absolutely secure. Read More
Order in the court The Challenge Invented 50 years ago in Mexico, the racquet sport padel tennis is now played all over Europe. In Sweden, sport floor specialist Unisport is riding the hype, having built around 60 pa... Read More
Giant hammer Driving a pile into the ground involves lifting a 6,000 kg (13,200 pound) weight and accelerating it from a 150 cm (five feet) height, creating a 105 kilojoule force (78,000 foot pound) collision –... Read More
Testing the Energy Solutions of Tomorrow At Clemson University, an old shipyard has been turned into the world’s largest wind energy testing centre. Renk Test System (RTS), a German company, has provided a facility containing the world’s... Read More
Rallying for safe bolted joints Motor sports are not easy on the cars. High speed, torque, vibrations, g-forces and hard knocks put enormous strain on the cars and their components. Read More
Making deep sea drilling safer As the global industry looks for safer deep sea oil drilling solutions, MPO’s gas riser handling systems are in high demand. In just a few years, they’ve grown from a small office into a global supplier with over 200 employees. Read More
Extreme temperature and high pressure Ethylone and Propylene might not be well known substances to the general public, but they’re actually among the most important products in the global petrochemical industry. Read More
Faster transport for heavy machinery Excavators are a vital piece of machinery for any mine, but for all their horsepower, they are incredibly slow and cumbersome to move. In fact, 15 percent of their time is spent travelling, and this enforced downtime means lost income. Read More
Andritz Hydro Helping Hydropower Look to the Future The hydropower plant in Laxede on the river Luleälven was built more than 50 years ago. The turbines in two of the three units are now being refurbished and, for the first time, the runners will be replaced – a challenge taken on by Andritz Hydro AB. Read More
Right on target For over thirty years, Biathlon Target System Kurvinen has been a world-class pioneer in biathlon target and range systems and has exported its products to over 30 countries. During a competition, Kurvinen targets will be continuously shot at and subjected to thousands of hits. Read More
Turning water into power For over 35 years, Canyon Hydro has been delivering hydro-electric systems to customers all over the world, and has built up a reputation for efficient designs, quality components and comprehensive... Read More
The height of safety When you are building the world’s tallest freestanding broadcasting tower in one of the world’s most earthquake-prone countries, using anything but the highest quality materials and the safest construction solutions is just unthinkable. Read More
What a lift! When enormous 35-tonne containers are being maneuvered into place at the world’s major ports equipment reliability is paramount. The giant cranes must work under tight constraints and with exacting precision.That’s why Nord-Lock and crane spreader manufacturer Bromma are the perfect match. Read More
Tough machines for a tough industry In the mining industry, every minute of downtime results in lost income, and one loose fastener can cost a small fortune. This is why Joy Global doesn’t compromise when it comes to bolt security. Read More
Propelled upwards Sensenich has been manufacturing aircraft propellers since 1932, and as the industry has grown and developed, it has continued to develop new propellers to match. Read More
The World’s Biggest Crane Bigge 125D AFRD (A-Frame Ring Derrick) is one of the biggest super cranes in the world. A machine of this size needs a strong bolting solution, that's where Superbolt tensioners were used to connect large components. Read More
Maintaining a tight grip Bolt loosening can occur due to settlement or relaxation of a bolted joint. Nord-Lock X-series washers prove to be solution for Mosdorfer's space dampers. Read More
Competing in the world’s most dangerous race In January 2013, the legendary Dakar Rally started in Peru for the first time and end in Chile, having crossed the Andes into Argentina. Read More
Forging ahead How do you hold together a press which exerts 8,000 tons of pressure to shape red-hot pieces of metal which themselves weigh tens of tons? For A. Finkl & Sons, a leading supplier of forging die steels and custom open-die forgings, there was only one answer: Superbolt. Read More
Eliminating bolt loosening for good At power plants across the world, gas turbines are becoming increasingly vital to the world’s power supplies. Mitsubishi Heavy Industries currently manufacture ultra-large gas turbines, which are more than six metres tall and over 16 metres long. Read More
Adjustable bolted propeller Large ships are increasingly being equipped with higher propulsive power. This trend is generating a need for larger propellers. Such propellers are typically of monobloc design, i.e. constructed from one casting. They are difficult to machine and their high weight and bulk make handling and transportation a costly enterprise. Read More
Bolting into space Mankind’s next giant leap in space exploration will take us to destinations throughout our solar system never before explored by humans.The spacecraft that will take us there, the Orion Multi-Purpo... Read More
Safe travelling The City Tunnel is a rail link between Malmö and the Öresund Bridge in Sweden, with a six kilometre railway running under Malmö city centre. The glasswork company Skandinaviska Glassystem, was assigned the task of constructing the roof of the new Triangeln railway station situated in central Malmö. Read More
Powering the industry Electric motors are often called the “workhorses of the industry”, running all kinds of machinery ranging from escalators and ski lifts to huge port cranes. Heavy mechanical movements require a reliable drive that ensures the best torque, speed, and motor efficiency. This reliability often starts with the right bolt securing system. Read More
GE Wind turbine using Expansion bolt for blind hole The Nord-Lock Expansion bolt for blind hole applications is used on the flange coupling of the gear box on this wind turbine. The solution integrates Superbolt technology and is used to transmit the enormous torque. Read More
Press columns on forging press Due to the nature of big presses, large diameter columns must be used to distribute the extremely high working loads generated. However, the torque required to prestress these columns is almost impossible to achieve with conventional bolting methods. Read More
Opening new doors Since its completion last year, the Burj Khalifa skyscraper in Dubai has already broken numerous world records. Apart from being the tallest structure ever built, it also includes the world’s highe... Read More
Good vibrations The huge machines made by Metso Minerals France are a mechanical nightmare. Whereas vibrations are usually eliminated from machines, the very raison d’être of the Metso machines is to vibrate as mu... Read More
The power of the sun: transformed by Siemens turbines Assembling an industrial-sized turbine requires acres of room. It also requires thousands of bolts and washers to be assembled and tightened to guarantee a service life of the product, which in the solar energy, biomass, oil and gas sectors, is typically upwards of 30 years. Read More
The Mercedes connection Hybrid vehicles use combustion engines and electric motors in parallel. High-voltage supply systems in these new vehicles place considerable demands on the connectors which provide the interface between the battery and the electronics. Read More
Plunging to New Depths In its quest to be the world’s leading service provider for the exploration and extraction of natural resources, Fugro has had to overcome all the world’s natural barriers. With its world class ROVs (remotely operated vehicles) even the deepest oceans are within its reach. Read More
Pulling Their Weight Through the daily grind of its gruelling work schedule, many areas of a tractor, such as the front axle, come under incredible strain and bolt loosening can be a constant problem. ITL use Nord-Lock washers in all such critical areas, including the front axle, engine clutch and gearbox. Read More
Vertical agitator The bearing play specified by the bearing manufacturer FAG for this tapered roller bearing could not be adjusted correctly. The existing bearing lock nut design and the tight space have prevented this. Read More
Built for Speed The world’s fastest conventional trains run in France, and not just to break the April 2007 record of 574.8 km/h (under test conditions with a shortened train). The TGV regularly runs at 320 km/h and at those kinds of speeds it is absolutely vital that nothing falls off the rolling-stock to derail the train. This is where Nord-Lock comes into the picture. Read More
Tough trial puts wheel nuts to the test “We’ve been in some pretty tough situations but we haven’t had any wheels come loose since we fitted Nord-Lock wheel nuts.” - proven at the European truck trial Read More
Conquering the Seas Mitsui recently began using Nord-Lock components in their marine diesel engines. Because Nord-Lock components are comparatively light and small, they are effective in making assembly and tightening quicker and safer especially in poorly-accessible or confined places. Read More
A Giant That Treads Softly A combine harvester fitted with the Soucy Track system reduces the pressure exerted on the ground. Chemical adhesives used for bolt securing in the past often failed, and then they turned to Nord-Lock washers. Read More
You’re gonna dig this A kilometer below the churning waves, more than a thousand pairs of Nord-Lock washers are used throughout the plough application where clamp load must be maintained in the bolted joints. Read More
Underground operations Sandvik Mining and Construction was having problems with the bolts clamping the cutting tools to the reaming head; they were sometimes coming loose under the extreme vibrations, loads and torque involved. Replacing the bolts which vibrated loose was a costly, time consuming and often dangerous job. Read More
Built for Speed The latest version of Japan Railway’s famous Shinkansen, known around the world as the Bullet Train, reaches speeds of 300 kilometres per hour. Read More
A formula for success A key piece of equipment in any pit stop is the pneumatic impact wrench, or wheel gun, which is relied on to loosen the large nut holding on each wheel and then screw on a new wheel – all in the blink of an eye. Read More
Tunnel vision Twenty meters beneath the streets of Malmö, Sweden, the new underground section of the city’s central station is gradually taking shape. Read More
Piste perfect Whatever slope a skier can ski down, this vehicle can drive up. Regardless of the angle, the pitch, the bumps and the dips, the extreme cold and driving snow, nothing stands in its way. Read More
Cranes The connection between the slewing ring and the portal requires very high precision during the tightening of the bolted connection. Kirow Ardelt meets these high demands by using Superbolt® tensioners. Read More
Durable Bolted Joints in Steel Construction Nord-Lock's steel construction experts share vital experience and knowledge to achieve durable bolted joints for steel structures. Read More
The Experts: What Happens When Bolts Start to Rotate? Vibration, dynamic loads, settlements and more - how do you maintain preload when a bolt is exposed to these external factors? Read More
The Experts: Can I Use Nord-Lock Wedge-Locking Washers on Painted Surfaces? Nord-Lock wedge-locking washers are an effective bolt securing method for use on coated surfaces in offshore industries Read More
How Much Force is Required to Tighten a Bolt? You can use the weight of heavy animals to understand the exponential torque force required to tighten larger bolt sizes Read More
When NOT to Use a Wedge-Locking Washer Nord-Lock engineers highlight niche examples of when wedge-locking washers are not a suitable method to secure bolted joints. Read More
What happens to preload and clamp force when external loads are applied? We generally apply torque via a wrench to the bolt or nut to generate the required tightening load. This tightening load is called preload. Preload is defined as the tension created in a fastener w... Read More
What affects pivot wear? For a machine manufacturer there are many factors to consider to minimize pivot wear over time. Read More
What to consider when reusing bolted joints? A bolt is installed in a factory without lubrication and everything works fine… until the first time the bolt is removed and reused. Then the problems start. Why? Read More
3 Tips to Choose the Right Bolt Securing Solution Do you work with planned maintenance? Are you seeking a solution that will prevent bolt loosening in your applications? Depending on the application, bolt loosening can have profound consequences b... Read More
What Are the Thermal Effects on Preloaded Joints? Due to temperature variations, parts and fasteners expand or contract with various amplitudes depending on rate of temperature change, the mass and size of parts, conductivity of metals, and the coefficient of expansion of each individual materials. Read More
What Is the Load Transfer Factor? When utilizing hydraulic bolt tensioners to induce a controlled preload into a bolted joint, several key factors including load transfer factor need to be examined. Read More
What Is the Relationship Between Torque, Preload and Friction? One of the main methods to preload a bolt is to apply a torque on its head. This is a very common process in the industry, however it is not easy to control accurately. Read More
What Is the Difference Between a Straight Pin and Expander System? Pivot pins are located on cylinder rod ends and between moving mechanical parts. But what how does Expander System work differently from a traditional pivot pin? Read More
The Experts: The making or breaking of bolted joints What is Hooke’s Law and why is it crucial to bolted joints? Hooke’s Law relates to the accurate tightening of bolted joints. When examining a bolt’s behaviour, the axial force is plotted against th... Read More
Top Tips from the Bolting Expert Japan’s foremost expert in bolting and author of 'Bolted joint engineering' - Doctor Tomotsugu Sakai - shares his insights about bolt fastening Read More
Best Way to Improve Fatigue Resistance of a Bolted Joint The fatigue capacity of a bolted joint is very small, as compared to its static capacity. To improve fatigues resistance, we look into ways to reduce alternating stresses at the threads. Read More
How to Optimize a Bolted Joint Through Clamped Length? Clamped length is the free length of a bolt that is stretched under tension. Find out what is the optimal bolt length that you should consider. Read More
When and Why Do You Need Lubrication During Tensioning? Proper use of lubrication is crucial to safeguarding repeatable and precise preload control in bolt tensioning. What should you pay attention to during lubrication? Read More
The Experts: Understanding the markings on nuts and bolts Bolt heads and nuts are often marked with numbers, letters, dashes, slashes, dots, or an assortment of other marks. What do they mean? Read More
Can I use Nord-Lock stainless steel washers with steel bolts? When designing a bolted joint, there are several aspects to consider. Find out what to take note of materials to use for parts of the joint. Read More
Preventing galling and seizing in bolting Galling is caused by a combination of friction and adhesion between metallic surfaces during sliding. In extreme cases galling leads to seizing. Read More
The Experts: The benefit of SC-washers What is a SC-washer and when should I use it? Read More
What Effect Will Nord-Lock Washers Have on My Surfaces? Will Nord-Lock wedge-locking system damage the surface in my application? Read More
Why does torque vary when tightening and untightening? Why is the untightening torque lower than the tightening torque when tightening a bolt or nut? Read More
The Experts: Why do Superbolt multi-jackbolt tensioners prevent loss of preload? Superbolts have been used in numerous demanding bolting applications with extreme working loads and high vibrations. What mechanical principle of Superbolts prevent loss of preload? Read More
What Are the Key Advantages of Hydraulic Tensioners?  What are the key advantages of hydraulic tensioners? Read More
Can I Use an Additional Locking System with Nord-Lock Washer? Other specialised locking systems, including prevailing nuts and adhesives, are not advisable and would not add any benefits to the joints. Read More
Should I change my tightening torque with Nord-Lock? Does the use of Nord-Lock washers affect my tightening routines? How? Read More
The Notch Effect What is the notch effect and how does it affect bolts? Read More
How to determine a suitable tightening torque I don’t know the tightening accuracy of my tool. How should I proceed with my torque calculation? Read More
The Experts: Getting the most out of fasteners Before you re-use bolts, you should always consider the security level of the assembly and economic factors. Read More
The Experts: Picking up the slack Why is slackening becoming an increasing problem? Read More
The Benefits of Bolt Shanks What is a bolt shank and what are the benefits and advantages of this solution? Read More
The Experts: Superbolt – your flexible friend How does the added flexibility of Superbolt improve the bolted joint? Read More
Tightening Superbolt Why should I tighten a Superbolt initially in a crosswise pattern? Read More
The Experts: Thread engagement in a tapped hole What is the recommended thread engagement to make a strong connection for a component with a tapped hole? Read More
The Importance of Temperature in Bolting What is the most common temperature range for bolts, and what are the consequences of exceeding it? Read More
Extending the Service Life of Studs and Bolts How do you extend the life of studs? Read More
Effects of Lubrication When Reusing Fasteners By lubricating the fastener before every use, not only can friction be reduced to improve torque-to-load ratio, friction scatter can also be reduced to improve preload accuracy. Read More
Top 10 Tips for Secure Bolting Achieving the safest, most secure bolted connection involves many factors. To help you achieve the best possible results we have summarized our top tips. Read More
The Experts: The story behind the phenomenon The ‘Virgin Bolt Phenomenon’ is not commonly known but is an important variable to take into account when evaluating stretch measurements properly’ Read More
The Experts: Sharing the load Why does Nord-Lock supply a hardened washer with every Superbolt tensioner? Read More
Continued Innovation: Tamper-resistant tensioner ready for the market The tamper-resistant tensioner is much like an armoured version of the multi-jackbolt tensioner, except it requires a specially designed socket for tightening and removal. Read More
The Formula for Calculating Jackbolt Torque How do I calculate the jackbolt torque (based on a formula)? Read More
The Experts: SEMS overview  What are SEMS? Read More
What Is Material Fatigue? Material fatigue occurs when a component is subjected to cyclic loading. What is the fatigue phenomena in bolted connections? Read More
How Do I Take Torsion into Consideration When Tightening?  How do I take torsion into consideration when tightening a bolted joint? Read More
Which Washer Material Should I Choose? Nord-Lock washers come in five different materials. How do I know which one to use in my application? Read More
How Much Thread Engagement Is Needed in a Tapped Hole? Is it possible to determine the minimum thread engagement in a tapped hole to avoid thread stripping? Read More
The Experts: Can Nord-Lock be used on inclined contact surfaces? What is the maximal angle of surface inclination where the Nord-Lock wedge-locking system can still work successfully? Read More
The Experts: Do Nord-Lock washers work with fiber composites? Can Nord-Lock washers be used on fiber composite materials? Read More
The Experts: Can I yield my bolt by over-tightening? Do I risk yielding my bolt, due to over-tightening, when using Nord-Lock wedge-locking solutions? Read More
Can I Use Other Washers with Nord-Lock Washer? Can I put another washer under a Nord-Lock washer? Read More
Should I choose fine or coarse threaded bolts? Threaded fasteners are commonly used in bolted joints, but what is the difference between fine and coarse threaded bolts? Read More
Why Use Wedge-Locking Instead of Friction-Based Locking? What is the difference between friction-based locking and wedge locking and when is lubrication needed? Read More
The Experts: Why do bolts rotate loose? Why do bolts and nuts rotate loose when a bolted joint is subjected to vibration and/or dynamic loads? Read More
Good Vibrations: Innovating Small-Scale Wind 'Turbines' Vortex Bladeless Wind are an innovative wind energy startup, pioneering technologies to provide residential wind energy. Read More
History of The Washer From the wagon to wedge-locking, loosening or slackening have been intrinsic problems since the invention of nuts and bolts Read More
Making It Circular: Mining Machines and Manganese Steel Sandvik Rock Processing Solutions operates one of the world’s most sustainable manganese steel foundries, where circular design is part of the business model. Read More
What do I need to know about the Circular Economy? An introduction to the circular economy, circular design, closed looped systems and potential new business models Read More
The Obvious Business Case for Sustainability Sandvik's Head of Sustainability talks about making the shift towards a circular business model Read More
Electrification in Mining - Sparks of a Low-Carbon Future Mining is crucial to build green technologies, but the industry itself must decarbonize to meet global sustainability targets. Read More
Dinghan Railway Technology Relies on Nord-Lock Vibrations, dynamic transverse forces, and high speeds require the highest safety standards in railway fasteners Read More
From a blank paper to a new generation coupling bolt Steve Brown started his career working with coupling bolts for a company in his hometown outside Manchester in the UK. 30 years later, he has come full circle with the design of a new generation co... Read More
Bridge Repair Like Open-Heart Surgery Safety and security were top priority during essential maintenance to the Emmerich Rhine bridge, a busy thoroughfare that remained open to traffic while bolted connections were replaced. Read More
Bridge Design and Industry 4.0 Industry expert Professor Raid Karoumi explores how automation and smart technologies will affect the future of bridge design, inspections and maintenance. Read More
The path to Green Steel The production of steel is one of the world’s major polluters. With the ever-sharper focus on the climate crisis and sustainability, things had to change. And they are, through innovations and circular thinking. But it’s a long road that will require new thinking throughout the product life cycle, from design to end-of-life solutions. Read More
Offshore floating wind energy Imagine producing 11 times more electricity than the entire world needs, using only offshore wind turbines. This may well be possible, reports the respected International Energy Agency, IEA. Read More
Boltight TSR+ Sometimes you know that a very good solution can be further improved. But actually figuring out how to make a good product great can be difficult. Here’s how the faster, safer and more robust Bolti... Read More
Common Bolt Locking Methods When choosing a method for preventing bolts from loosening in an assembly there are many different options. One needs to assess the risk of joint failure and the dynamic loads the joint will meet d... Read More
Impact of Extreme Temperatures on Metallic Materials There are dozens of bolting and fastening applications that may involve extreme temperatures. It is important to consider the effects these temperatures will have on the metals being used. Read More
Getting Smart with Superbolt Nord-Lock Group has developed a smart preload monitoring technology, taking the Superbolt Multi-Jackbolt Tensioners (MJTs) to the next level. Read More
Get Smart: The Future of Industrial Automation Is Here Connected machines, components, and systems are creating intelligent networks that can control each other autonomously. How do we adapt in the manufacturing industry? Read More
The Holy Grail of Jackbolt Tensioning Since the launch of the Superbolt Multi-Jackbolt Tensioner (MJT) in 1984, efforts have been made to constantly improve efficiency. Read More
Opportunities in the CIS mining industry Higher commodity prices, lower inflation and an ongoing recovery in the still-shaky Russian economy are fuelling a similar recovery in other CIS countries, in the process opening new opportunities... Read More
Reliability Is The Key To Running A Successful Railway Expander System pivot pin is the permanent solution to lug wear for moving mechanical parts and rod ends. This ensures reliability in the operation and safety of the railway industry worldwide. Read More
Bolt loosening due to vibration. Stop loosen bolts. Why Do Bolts Loosen? Bolt loosening can have profound consequences. One loose bolt can bring a whole production plant to a standstill, while in other applications loose bolts can pose a significant safety hazard. So, what are the main causes of bolt loosening? Read More
How Bolts Are Made? Here Is the Manufacturing Process Bolts can come in a wide range of different sizes and shapes, but the production processes may vary depending on how advanced the bolt designs are. Read More
A viable solution that can end lug wear In many industries, lug wear is simply accepted as an unavoidable fact of life. But does it need to be? Could the Expander System offer a viable solution? Read More
The History of the Bolt When were the first bolts made and what were they used for? Nord-Lock Group traces the history of the bolt, from ancient Egypt through to modern day bolts & screws. Read More
Safely Securing Connections in Structural Steel Steel is one of the most commonly used materials in commercial and industrial building construction as it provides high design flexibility. Read More
Hydraulic tensioning or torquing - that is the question Which is the best method for controlled tightening of a bolted joint? Bolted plays hydraulic torquing off against hydraulic bolt tensioning. And the winner is… Read More
Thread Standards: The Search for a Red Thread Let's explore the history, the evolution and the future of these crucial but often overlooked thread standards. Read More
Coupling Challenges & the Evolution What are the challenges with couplings and how they evolved over the years. Bolting experts at Nord-Lock Group share useful insights into the application. Read More
Mythbusters: A small thread pitch reduces fatigue life due to the notch effect A general statement is, as so often, not possible in this case since various parameters interact. There could be more factors that influence the thread pitch. Read More
Health & Safety: Shared expertise increases safety DROPS (Dropped Objects Prevention Scheme) was started to counteract objects dropped from height damage equipment, disrupt operations and causing injuries. Read More
Nord-Lock Group uses Siemens NX CAE to develop cutting edge technologies Bolting solution specialist uses NX CAE to develop cutting-edge technologies. Gained insights of bolted joint and causes of joint failures. Read More
New innovations to solve difficult shaft coupling bolting problems Examine possibility to overcome bolting challenges to achieve a bolted connection that is pre-loaded safely. Read More
Bolting With Plastic and Composites The multifunctional wedge-locking technology has a number of advantages compared to conventional solutions when bolting plastic and composites. Read More
The Comparison: Bolts vs Rivets By using Nord-Lock washers, a bolted fastener can overcome many of the disadvantages of rivets, while still offering the advantages of bolts. Read More
Does Adhesive Works as a Lubricant During Tightening? Chemical thread locking is a traditional solution used against bolt loosening, but does it has the same effect as a real lubricant? Read More
Bolting Failure Analysis Nuts and bolts are used everywhere. A bolting failure at home is usually only a minor nuisance. However, a similar failure at a nuclear power plant could be catastrophic. Read More
Friction: A force of nature Friction is a factor not to be ignored when it comes to tensioning bolts. Always present in a bolted joint, friction can be part of the problem – or part of the solution. Read More
Stronger, safer bolting with FEA software Nord-Lock Group's Finite Element Analysis (FEA) offers a fast and convenient method for calculating the risk of bolt failure. Read More
Aluminium: The endless benefits Aluminium has dominated the aerospace industry for over half a century. Now other industries are turning to the miracle metal. Read More
Expandable bolts save time and money Superbolt EzFit expansion coupling bolts offer a simple and quick bolting solution for large machinery couplings that will save time and costs. Read More
Comparison of Common Bolt Tightening Methods Tightening methods can be categorized according to the principle of how the preload is generated. The 2 basic principles are rotational tightening and tensioning. Read More
Mythbusters: A common misconception is that stainless steel is never affected by corrosion Stainless steel is never affected by corrosion - is this the truth or a misconception? Read More
Combating Corrosion and Protection for Fasteners Any metal product will eventually rust. How corrosion happens and why choosing the right materials and corrosion protection for the bolt is crucial? Read More
Mythbusters: It takes longer to install a Superbolt (MJT) than the solution you already have Tightening large diameter bolts with Superbolt tensioners, does it take more or less time? Read More
Comparing Nord-Lock X-series with serrated spring washers How does Nord-Lock X-series washer compares to a serrated spring washers? Let's look at the dynamic loads, reusability, settlement and creep. Read More
No bolt loosening in steel structures Nord-Lock introduces a new range of washers specially designed to fit the HV bolting systems used for steel construction. Read More
Does the Torque Still Remain in the Bolt After Tightening? Many people believe that after tightening part of the torque still remains in the bolt - is that true or false? We got the answer! Read More
STCs offer a unique alternative for large press columns This patented design is a new style of Superbolt tensioner that makes it even easier to secure large threads and press columns. Read More
Comparing Superbolt nut-style multi-jackbolt tensioners with hex nuts How does Superbolt tensioners compare to hex nuts? Let's look at the design aspect, safety, installation times and galling issues. Read More
Think Big Superbolt tensioners - from an eureka moment in a US steel mill to a widely used tensioning solution, securing satellites to submarines to the Large Hadron Collider at CERN. Read More
Superbolt: A simple idea with global potential A culture of innovation led to new product lines based on the Superbolt multi-jackbolt tensioner design. Read More
Fastener quality: All in the details Quality fasteners are essential for safe, economic designs. But what determines quality, and how do we make sure we obtain good quality? Read More
Mythbusters: If the clamp length is at least five times the bolt’s diameter, then the joint will not loosen from vibration Is that true or false? Read More
Do Higher Grade Bolts Have Lower Stretching Ability? The higher the bolt grade, the lower the stretching ability of the bolt. Is this true? Read More
Is Extension Socket the Best Bolt Locking Method? Extension sockets or Nord-Lock washers? Let us take you through the key parameters so that you can make the right choice. Read More
Get value for life: Proper bolt securing may reduce costs 1,000 times While there may be cheaper alternatives, choosing the right bolting solution will pay you back many times over in the long term. Read More
Is Tab Washer the Best Bolt Locking Method? Tab washers or Nord-Lock washers? Finding the ultimate bolt securing system is no easy task. Here is a guide to making the right choice. Read More
Talking the Torque Experienced assembly technology engineer Bernard Tollet discusses optimising torque and clamp load, and the various ingredients concerning tightening technologies. Read More
Offshore special tensioner This tensioner was developed for the unique needs of the offshore industry. Read More
Is Nylon Insert Nut the Best Bolt Locking Method? How do Nord-Lock washers compare with nylon insert nuts? This guide lists key parameters to help you make the right choice. Read More
It’s All About the Coating The coating is a fastener’s skin – a protective shell that preserves the steel that it encases. But what types of coatings are there and what are their purposes? Read More
Introducing the Junker Test According to DIN 65151, the Junker vibration is considered to be the most rigorous method for testing bolted joints. Read More
Is Locking Wire the Best Bolt Locking Method? Safety wire/locking wire or Nord-Lock washers? Let us take you through the key parameters so that you can make the right choice. Read More
How to Pick the Right Bolt Size? A common mistake is to oversize the bolt, which can result in costly failure and censure. What should you take note when choosing the right bolt size? Read More
Is Adhesive the Best Bolt Locking Method? Adhesives or Nord-Lock washers? Finding the ultimate bolt securing system is no easy task. Here is a guide to making the right choice. Read More
Superbolt’s Culture of Innovation and All Eyes On Smart Bolting From an industrial fix to a global brand synonymous with multi-jackbolt tensioning, and now predictive maintenance with digital bolting. Read More
Behind Every Great Gain Is a Thousand Hidden Efforts An appreciation of the fastening technologies that hold our world together, and the people behind them. Read More
Christoph Seeßelberg: What is so Fascinating about Crane Tracks? Bolted joints are a crucial aspect of crane maintenance, keeping whole production lines functioning Read More
Elena Moral Elena Moral has spent almost two decades as an engineer within the railway industry at Talgo, a Spanish manufacturer of high-speed trains. During that time, she won the 2019 Women in Construction a... Read More
Focusing on Dropped Objects Preventions Allen Smith travels the world to deliver comprehensive familiarization and coaching on behalf of DROPS Read More
“Instrumented bolts would be really interesting for the industry” “Instrumented bolts would be very interesting for the industry” Read More
Hydropower: Relying on Superbolt for 30 years When it comes to long-term Superbolt users, American Mike Bruno is hard to beat. More than 30 years ago, he was involved in one of the earliest installations of Superbolt tensioners in a hydropower... Read More
Offering a greater field of solutions For Fred Heaton, what started out as a hobby in 1999 quickly grew into a thriving business specialising in hydraulic bolt tensioners. Now Boltight has been acquired by the Nord-Lock Group, in a mov... Read More
Fastener peace of mind Understand the risk of hydrogen embrittlement and ensure good sourcing of fasteners by questioning quality-related issues and manufacturer's capabilities. Read More
A unique technology is emerging Nord-Lock Group interviews Laurence Claus, an expert in fastener and automotive supplier industries, with more than 25 years of experience. Read More
Chalmers takes the chequered flag Young engineers from Gothenburg’s Chalmers University of Technology – proudly partnered by Nord-Lock – have won the world’s largest student engineering competition. After ten months of designing, b... Read More
They didn’t think we could succeed An interview with Kurt Persson, Senior Advisor of Nord-Lock. With 50 years of experience, see how he describes the evolution of a humble family business to an international industrial company. Read More
Safety and quality are key Velan’s valves play a critical role in the world’s nuclear power stations. Jean-Luc Mazel, Industrial Director of Velan SAS, the French affiliate of Velan Inc, discusses safety, the aftermath of th... Read More
Knowledge Prevents Bolt Failure When Bill Eccles was a design engineer, he noted that people generally agreed on many different things. “However, as far as nuts and bolts were concerned, everyone had different information.” Read More
Improving offshore safety through certification With nearly a quarter of a century of experience testing bolted connections at Det Norske Veritas (DNV), Andrzej Serednicki has carried out dozens of highly demanding tests to ensure the highest sa... Read More
Safe operations in extreme conditions A few years ago, Stefan Ladenburger took over as Managing Partner of Holzwerke Ladenburger, representing the third generation of this family business. Read More
Providing an antidote to disaster Philippe Nouaille is responsible for overseeing how nuclear plants could be better secured against earthquakes – the natural disaster which gives nuclear engineers their biggest headaches. Read More
Prestigious Red Dot Design Award to Nord-Lock Group Nord-Lock Group receives one of the world’s most prestigious design awards, Red Dot Award, for the Superbolt Tool, which wins ”Best Product Design 2020” in the Innovation category. Read More
Nord-Lock Expands and Future-Proofs Its Production With the expansion, Nord-Lock will create new and more efficient production lines, introduce new machines with more automation, as well as offering better premises for optimized workflows. Read More
The Next Level of Smart: Superbolt Load-Sensing Tensioner New ways to offer unprecedented security and bolting convenience. The first of these Industry 4.0 innovations has arrived: the Superbolt Load-Sensing Tensioner with built-in preload monitoring system. Read More
Boltight TSR+ Tensioner The new Boltight TSR+ auto return tensioner is designed for simple and reliable operation. It is particularly suitable for the oil and gas industry, bringing benefits such as durability and higher safety. Read More
Nord-Lock Group and Mitt Liv enter a long-term partnership for a diverse labor market Nord-Lock Group, a global leader in secure bolting solutions, has started a collaboration with Mitt Liv in Malmö to contribute to a more inclusive labor market. The partnership is a strategic step... Read More
Nord-Lock introduces an extended wheel nut range Nord-Lock wheel nut is available from sizes M16-M24, offering increased safety for a wide range of on-and off-road vehicles. Read More
Nord-Lock steel washers promise highest salt spray resistance on the market Nord-Lock wedge-locking washers guarantee high corrosion resistance after intensive testing of 1000 hours neutral salt spray test according to ISO 9227 Read More
Boltight embraces augmented reality tooling Have you ever wished you could try out a tool without the hassle of carrying it around on site? Now you can experience working with a tensioner and augmented reality directly from your mobile device. Read More
Nord-Lock Group Wins Prestigious Export Award The Export Hermes award is given by the Swedish Fund for Export Development to companies that have achieved exceptional export success, thereby contributing to Sweden’s prosperity. Read More
Introducing Superbolt MJTT We are showcasing our wide range of solutions including a new tool from Superbolt at Offshore Energy ‘18..  Read More
The Fastener Dimension Guide is here Rather than trying to find measurements from a table in standard sheets, you can simply enter the size and length of a bolt and find all the dimensions that conform to ISO standards. Read More
Introducing Torquelator by Nord-Lock Torquelator by Nord-Lock calculates pre-load and corresponding torque for bolted joints secured with Nord-Lock washers. Read More
Traceability down to material and batch of axle A dot pin marking that includes the Expander System brand will be fixed on each pivot pin, offering added value for users as it improves traceability and control. Read More
Extended temperature range for usage of Nord-Lock steel washers Nord-Lock steel washers have been approved for temperatures down to -50°C by an independent test institute Swerea Kimab and TÜV. Read More
Nord-Lock Group introduces Lifetime Warranty The Nord-Lock Group is proud to be the first bolting solutions partner to offer a full lifecycle warranty across all of its technologies. Read More
Simplify assembly with Nord-Lock combi bolt washers With our combi bolt washers you can improve assembly efficiency, accuracy and safety while at the same time keeping inventory and part count at a minimum. Read More
Life in the engineering fast lane Attracting young talent to the manufacturing industry is getting increasingly challenging. So what can companies and academia do to attract young talent? Read More
Nord-Lock Group acquires Expander Group Nord-Lock Group has acquired the Expander System, which specializes in the design and manufacturing of expandable pivot pin system. Read More
A new range of washers for the steel construction industry Nord-Lock Steel Construction (SC) washers specially designed for use in structural steel parts and to fit HV sets and HR sets. Read More
Nord-Lock supports Mexican students in global competition Nord-Lock Group sponsored team of engineering students has won first place in the Mexican national final of the Human Powered Vehicle Challenge. Read More
Nord-Lock Group acquires Boltight Limited Nord-Lock Group acquires Boltight Limited, a leading hydraulic bolt tensioning company with a global reputation for innovation and excellent quality. Read More
Video: Get to know Expander System Expander System pivot pins allow you to avoid costly and time-consuming repairs that would normally involve welding and line boring. Watch now
Video: When Safety Really Matters The roller coaster at Tusenfryd Amusement Park in Oslo has over 1 million bolted joints. They have installed Nord-Lock washers to prevent bolt loosening. For critical bolted connections, there is no room for error. Read More
Video: Bolt Behavior and Its Elastic Limits What are the effects when tightening a nut or bolt? Watch this video to find out more. Watch now
Video: How Does the Nord-Lock Washer Work? Nord-Lock washers secure bolted joints with tension instead of friction. Find out more about the locking method in this explanation video. Watch now
Video: Installing Ezfit Mechanical Expansion Bolts Superbolt EzFit mechanical expansion bolts were able to solve a problem when standard fitted coupling bolts were causing severe damage to the turbine couplings. Watch now
Video: Boltight Typhoon bolt tensioners Widely used within Wind industry for the need of high-load, low profile solution for space-restricted applications that demand high and accurate preloads. Watch now
Video: Boltight easy piston retraction pump Boltight’s piston retraction system takes the hard work out of reseting bolt tensioner piston stroke. Depending on the design of the tensioner, the pump will give automatic piston retraction or ass... Watch now
Video: Irish Rail safely secured with Nord-Lock washers Safety is key on the railways. Irish Rail replaced the locking-wire mechanism on their wheel sets with Nord-Lock washers, watch them share their experience. Watch now
Video: Hydraulic tensioners for compact flanges Boltight’s Xtra Load range of bolt tensioners is used extensively in the offshore oil and gas industry for bolting compact flanges. Watch now
Video: Tightening Boltight multi stud bolt tensioners Boltight multi stud bolt tensioner is designed to provide high and accurate preload within a minimum diameter envelope. Watch now
Video: Installing a Boltight hydraulic bolt tensioner Designed with the benefit of more than 30 years experience in the field, Boltight has created a range of tools to meet the challenge of today’s hydraulic bolt tensioning requirements. Just watch ho... Watch now
Video: Boltight subsea hydraulic bolt tensioners Subsea tensioners from Boltight conforms to the requirements of European Pressure Equipment Directive. They save time, money and protects the environment. Watch now
Are Nord-Lock Wedge-Locking Washers Reusable? It is normally okay to reuse Nord-Lock wedge-locking washers, but you must inspect their condition for signs of wear and tear first. Watch now
Video: How multifunctional wedge-locking works? Designed with a combination of Nord-Lock wedge-locking to protect against spontaneous bolt loosening, and a spring effect to counter slackening due to settlement and relaxation.  Watch now
Video: Verifying the Locking Function of Nord-Lock Washers In this video, we focus on the steps to verify the wedge-locking function of the Nord-Lock washers. Watch now
Video: Nord-Lock Washers in the Junker Vibration Test Nord-Lock washers are compared with other locking methods in the Junker vibration test, which is considered to be the most severe vibration test for bolted connections. Watch now
Video: Introduction to Superbolt Ezfit Mechanical Expansion Bolts EzFit mechanical expansion bolts offer tremendous radial expansion and joint clamping power in one bolting system. Watch now
Video: ActSafe trusts the proven quality of Nord-Lock washers Securing bolted joints is about safety for installers and the public alike. Watch now
Video: Superbolt Multi-Jackbolt Technology Superbolt bolt tensioning eliminates unsafe and time-consuming methods when tightening large bolts. Watch now
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