Expander System Technology

Lug wear is a common problem with all machinery. Repairs involve a costly, time-consuming process with significant downtime and must be repeated several times over a machine’s life.

With the Expander System, the repair can be carried out directly in the worn mountings without welding and line boring – a permanent solution to lug wear.

A modern alternative for lug repair

  1. The Expander System is installed directly into the existing mounting
  2. Upon tightening the fasteners, the washer presses the slotted expansion sleeve up the tapered ends of the pin
  3. The sleeves expand, conform with the wear pattern and lock the system in the lug ears
  4. Once retorqued, the system will lock from both sides

Go to installation instructions >>

Quality & Traceability

The patented Expander System has been endurance tested for over 50,000 hours without failure and more than 1 million pivot pins have been installed in over 60,000 applications. 

Our production facilities around the world are equipped to enable high-speed manufacturing and delivery of complete pivot assemblies. 

We in­vest in the latest production technol­ogy to ensure maximum capability and quality, and we produce all parts of the Expander System.


We can deliver certificates and test­ing according to your needs. For exam­ple, certificates according to EN10204 or Ultrasonic-, Magnetic particle- and Charpy testing.

  • DNV for the offshore industry
  • TÜV Rheinland

Quality & Environmental Assurance

  • DNV 2:22/ OS E-101
  • API 8C/ISO 13535
  • ISO 9001
  • ISO 14001

Traceability & Control

The Expander Systems are dot pin marked with a lot number to ensure that you know exactly from where the steel originates and when it was made. You also have the opportunity to mark Expander axles with your brand to show your customers that you take pride in the details.

The Expander System is a recipient of the Alfred Nobel Swedish Innovation Development Award. 


Customer success stories