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Base Bolt Tensioner

Hydratight's specialty tensioners (formerly known as Base bolt tensioners) are now available under the Enerpac brand. Visit for product information.

The Base Bolt Tensioner, designed specifically for the wind energy market, eliminates any potential thread fit problems by utilising the existing hex nut on the stressing bar in order to induce the required load.


  • Simultaneous tensioning
  • Lightweight and compact
  • Up to 25mm one step operation available
  • Interchangeable

Elliptical Rebar Tensioner

This revolutionary new base bolt tensioner is perfect for all OEM tower base bolting.

The Elliptical Tensioner was designed by Hydratight to meet a specific customer requirement where accessability was an issue. The tool has a 20% reducation in width, which allows fit on all applications including the limited clearance inner bolts.

Hydratight's pioneering design enables the tool to work on both #10 and #11 sized rebar. Safety and performance enhancements include asymmetric rams, spring-loaded sockets, spring retraction and a positive stop to prevent damange by misuse in the field.


  • Asymmetric ram
  • Spring retraction
  • Spring-loaded socket
  • Fits #10 or #11 Williams or Dyson base bolt
  • Suits all applications including limited clearance inner bolts within tower
  • Fits all OEM towers
  • Utilisation of a positive step to eliminate risk of damage to piston
  • Light and compact