Effective protection against self-loosening in large bolted connections Large bolted connections with a nominal size of ≥ M24 can only be pre-tensioned by hand with great effort. The torque required to tighten the connection is simply too high, which means that electrically, pneumatically, or hydraulically powered torque tools must be used. However, the use of…
Special equipment for industry
HEICO LOCK
Single-stage bolt tensioner with threaded puller
A feature of this bolt tensioner is its low profile. The single-bolt tensioning device is low-cost and thus has a short payback period. It is used in many different industrial applications.
Clamping stroke dependent version with spacer plate
The hydraulic nut consists essentially of an internally threaded cylinder, a piston and a splitted spacer plate. The hydraulic nut will be pressurized up to the desired pre-tensioning force. This creates a gap between the piston and cylinder corresponding to the elongation and compression of the components. In this calculated gap the corresponding spacer plate…
