Boltight has been at the forefront of hydraulic bolt tensioning for over a decade. Our tensioning tools provide fast, accurate and safe solutions to tighten and loosen multiple bolts simultaneously.

Foundation Tensioners

Boltight’s range of foundation bolt tensioners have been specifically designed for wind turbine base and foundation bolts.

They meet the exacting requirements of the wind industry, while remaining reliable and easy to use.

Boltight tensioners are kept in stock for the most common wind turbine applications.


  • 1500 bar
  • Common to many bolt sizes
  • Economy (customer nut) and split nut types also available
  • Spring return, gearbox, positive stop etc available as options
  • Optional single or twin connectors
  • Optional cycle counter
  • Long life composite seals
  • Comprehensive operating manual
  • Over-stroke prevention device
  • Maximum stroke indicator

Technical Guide

Suitable for the most common threadforms:

  • Williams
  • Standard metric
  • Standard imperial
  • Macalloy
  • Dyson

Suitable for the most common OEM wind turbines:

  • Clipper
  • Vestas
  • Gamesa
  • GE
  • Nordex
  • Siemens
  • RE Power
  • Sulzon
  • MHI


  • Easy to use
  • Durable and reliable design
  • Gear driven nut run-down
  • Extra durable gearbox
  • Optimised size and weight
  • Easy maintenance

Testing & Certification

Boltight is LRQA certified for quality and environmental assurance to ISO 9001: 2015. All tools are assembled, filled with oil and pressure tested prior to despatch.

Request a Quote

Fill out the form below to receive additional product information or to contact an engineering expert.

To read more on how we handle your contact details please see our Privacy Notice.

Thank you! Our experts will be in contact with you shortly.

Boltight product range