application example bolt tensioners: torsion-free

1Application example: Bolt Tensioners: Torsion-free generation of tension force.Hydromechanical power clamping nut series HMP-HD.

2 Screwing ring nut (main nut) onto thread bolt by hand.

3 Put distance ring (support sleeve) over ring nut.

4 Screwing clamping nut onto thread bolt up to support sleeve by hand.

Section representation:Clamping nut HMP-HD with pressure piston in double row design and pull back spring.5

6 Hydraulic connection per quick-lock coupling.

Clamping act:Pressurization according to clamping force diagram – optional with path control.Axial screw extension through frictionless force generation.

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8 Tightening main nut through cut-out per lever.

9Release operation: Activate drain valve of the pump and discharge hydraulic pressure slowly.Pistons moves back to starting position by spring return.

10 Disconnect hydraulic pipe at pressureless status.

Unscrew HMP-HD clamping nut from thread bolt.11

Remove clamping nut and support sleeve.The preload tension force resists in the screw connection.12

The bolt tensioner can be used for further clamping connections.Loosening process in converse order.13