M85-CWLWP

This M85  precision machined and specially hardened and tempered spring steel wedge lock washer pair is re-usable and suitable for securing bolted connections in the most hostile of operational environments.

Loosening of a bolted assembly takes place when the fastened bolt/nut rotates "spontaneously", and often the slightest rotation of only a few degrees is sufficient for a bolted connection to lose all its preload. This rotational loosening is exacerbated when any part of the bolted assembly experiences slackening, the collective term for the various causes of non-rotational loosening.

Our Conical Wedge Lock Washer Pairs address both the rotational and non-rotational causes for loss of preload in a well-designed bolted connection, firstly (as the Safety Washer does) it uses CAM geometry and contact GRIPS to deal with spontaneous bolt loosening from shocks, vibrations, and dynamic loading and secondly, (which is where our improvement focuses) it addresses slackening due to settlement, creep, differential thermal expansion, relaxation and yielding, through the introduction of a Conical Disc Spring to the overall shape.

Our Conical Wedge Lock Washers are used in mating pairs, where the two inner bonding surfaces will interlock together because of the CAM surface symmetry. System movement is only possible between these two inside surfaces and because of this geometry, readjustment of the load force happens automatically as the inside surfaces move in relation to each other. In this manner, it is a geometry driven pre-load force rather than just friction alone that ensures a secure connection.

This M85 Conical Wedge Locking Pair is suitable for use with high tensile bolt classes 8.8, 10.9 & 12.9 as they have been heat treated, hardened & tempered to easily leave impressions in these bolt & nut assemblies, Please refer to the Torque & Preload table provided with your Wedge Lock Washers that provides you with a suggested target preload, and the corresponding torque to apply depending on your lubrication regime, for bolt classes 6.8 to 12.9.