On-site Bolting/Cylinder


1. Torque Service

The hydraulic piston is connected to a ratchet via a reaction pawl assembly which allows it to engage the ratchet teeth in the advance mode to rotate the nut or bolt head, and subsequently release during piston retraction to re-engage in the next forward push position.

 Our hydraulic torque wrenches operate at 700 Bar maximum hydraulic pressure, incorporate a double acting heavy duty hydraulic piston for fast and easy operation, and can be used for accurately tightening or loosening nuts/bolts. A choice of standard square drive tools, suitable for use with a variety of sizes of torque wrench sockets, or hexagon drive cassette head tools that locate directly on to the nut/bolt are available.

2. Bolt Tensioning

Hydraulic bolt tensioners provide accurate method of applying tension using a hydraulic load cell and threaded puller, the securing nut is rotated using a short tommy bar, whilst the thread is being stretched, until
it is firmly tightened against the joint face. Immediately after the hydraulic press ( load ) is released, the bolt tension is retained. Hydraulic bolt tension can be linked together in multi- ples to ensure an even “ pull down “. or tension is applied to all bolts simul- tanseously.ensure an even “pull down” .