Nord Lock

Description

Our products are based on leading wedgelocking technology and are recognized for their ability to safely secure bolted joints exposed to severe vibration and dynamic loads.

Nord-Lock wedge-locking Technology:

Nord-Lock washers secure bolted joints with tension instead of friction. The system is comprised of a pair of washers with cams on one side and radial teeth on the opposite side. Since the cam angle ‘α’ is greater than the thread pitch ‘β’ a wedge effect is created by the cams, preventing the bolt from rotating loose

Product Benefits

Maintains high clamp load and thereby ensures the function of the joint
Quick and easy to install and remove with standard tools
Locking function not affected by lubrication
Defined and uniform friction conditions which result in a more accurate preload
Same temperature characteristics as standard bolt / nut
Reusable in addition,Nord-Lock washers do not affect the reusability of fasteners
The washers are hardened and can support and distribute great loads

Using Nord-Lock Washers

Nord-Lock washers secure bolted joints with tension instead of friction. The system is comprised of a pair of washers with cams on one side and radial teeth on the opposite side. Since the cam angle is greater than the thread pitch ‘β’ a wedge effect is created by the cams, preventing the bolt from rotating loose

Installing the Washers

The pre-assembled washers are installed in pairs, cam face to cam face. Nord-Lock recommends lubrication when possible

Tightening

Tighten Nord-Lock washers with standard tools according to the guidelines (on page 9-11). Tightening guidelines for other bolt grades are available through your Nord-Lock representative.

Untightening

Untightening Nord-Lock washers is as simple as tightening. Note that since the locking function is not based on increased friction, the untightening torque is generally lower than the tightening torque. Therefore it is not possible to measure offtorque as verification of locking function.

Reusing Nord-Lock

Nord-Lock washers can normally be reused. As with all fasteners, they should be inspected for wear before reassembly. Make sure that the washers are reinstalled correctly cam face to cam face. Nord-Lock recommends lubrication of fasteners before reuse in order to minimize changes in friction conditions..

NORD LOCK