Posted by Indiana Ken on November 09, 2012 at 05:01:37 from (66.249.234.243):
In Reply to: Pre-staked nuts posted by oldtanker on November 08, 2012 at 19:01:54:
There are various styles of locking nuts. The stover styles, flexloc nuts and nylon-insert locknuts are many times listed as reuseable. Another type referred to as centerlock are typically listed as not reuseable. Any good industrial supply company such as McMaster-Carr will carry the various types.
Either way, reuseable or not, you should always check the running torque during installation of any locking type nut. The running torque is the the torque required to turn the nut when it is has full thread engagement but before it begins to clamp against the mating part.
If you do not want the nuts to loosen the most important procedure is to torque the bolts at installation. If torque specifications are available for the machine use those, other wise use the standard value for the grade of bolt and thread type. Proper torque is also good (the best) insurance to prevent bolt breakage and the nuts from backing off.
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