Foundation Tensioners

For wind base and foundation bolts, the tensioner is suitable for most common threadforms.

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. are 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


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

Testing & Certifications

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 dispatch.