Thread Lock Question

[G7PSK]

Touch up paint pens work very well for locking threads while showing evidence of tamper, I used to use car touch up paint of the bottle and brush variety for locking IF can slugs,worked very well. Whatever you do don't use the yellow loctite used to be called bearing fit, it never comes undone unless heated to high temperature, I have seen 50mm shafts wring off with the stuff.

Loctite 603, used to hold bearings in place inside an oil bath. Removal is normally fatal to the bearing. I used some to hold in keyways, and they never rattled, even with a less than perfect fit. Held some gears onto a shaft as well, in addition to the section of tin can used to get the 2mm too large clearance between gear and shaft down to interference fit. Last I heard it is still running. Needed it working NOW.
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I used it on a 16 ton truck to fix the propshaft flange on the gearbox when the splines striped half way up a Spanish mountain as a get me home it was still holding several years later when I sold the truck. Great stuff.

[GreyWoolfe]

I agree with GK.  I use a propane torch to loosen set screws on laminator assembly gears that are used in our specialized printers.  There is no other way as the set screws are small and it is easy to tear up hex drivers.