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When you have taken brake discs off would you reuse bolts, reuse bolts but add more loctite use new bolts or clean threads and use copper grease. Opinions/reasons please
After the first bit of loctite from new I tend to clean the threads and use some grease/anti seize and I've never had a problem with losing rotor bolts, never lost one.
i don't always bother using loctite. even at 6N/m torque I have never had one work loose.
A dab of Superglue can work as well as threadlock like loctite. superglue is very weak in shear so breaks easy enough when you want it to.
coppaslip for me to stop them seizing. never had a bolt come undone, I have had them seize
Grease is the word.
I re-use them and add a dab of loctite blue, seems to lubricate them to get in there smoothly, and then sets to stop them loosening...
I think the point is: ap long ap you use something, it doesn't really matter what.
I prefer copper grease with the Shimano triangular torx bolts with the aluminium paired-tab-washers. Never comes loose and the bolts never seize.
PaulD