Foundation tensioners are designed to meet specific requirements for tightening foundation bolts.


They are versatile and reliable hydraulic bolt tensioners suitable for high load, tight space applications, and for variable and extended stud protrusions often relevant to wind turbine foundation bolt applications. Optimized for use on wind turbines they have been designed for long-life, low-maintenance use, and are suitable for use on single bolts, or grouped together for multiple tightening of bolted joints. They are extensively used for crane slewing rings, and foundation bolting on many types of civil construction projects such as bridge building.

Safe and Reliable

  • CE marked
  • Over-stroke protection
  • Max stroke indicator
  • Pressure Test Certification
  • Full color operating and safety manual

Latest Technology

  • Latest seal technology
  • High cycle life
  • Optimized load to weight ratio
  • Integrated system with TENSIONPRO pumps and hoses

Options and Features

  • Special threads (Standard Metric, Standard Imperial, Williams, Dyson, Macalloy, Special Threads)
  • Special load requirements
  • Twin or single port
  • Protective handle
  • Special bridge for tight clearance
  • Gear drive nut run-down
  • Spring piston return
  • Misalignment compensation
  • Special anti-corrosion, anti-wear surface finish