Quote:
Originally Posted by Sasha
We were not sure how efficient it is and wanted to explore other options.
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Thread locker is an excellent product for preventing fasteners from loosening, but has limits. If your set screw is loosening because of wear on the mating surface (e.g.: set screw digs into a round shaft and make a grove) thread locker will not solve the slipping problem. It doesn't take much of a flat on the shaft to prevent slipping. We always use thread locker on setscrews.
Also, have you seen the different types of setscrews? See the McMaster page:
http://www.mcmaster.com/#set-screws/=ve2e3b
I like the "extended dog" type with a shallow hole drilled on the shaft. It's bulletproof and on assembly, you can easily feel and see that the setscrew is seated; you can see by the depth of the tightened setscrew that it is engaged correctly.