Trouble with set screws!

[redshift]

Originally Posted by bruce750i

Is it a myth that loc-tite sets up faster in a squeeze(threaded) rather than just sitting on the suface open to the air?

Loctite is anaerobic, it cures in the absence of air.

Blue- temporary
Red- semi-permanent
Green- permanent

Even though green is permanent, it will remove with heat.

The best method I've found is grinding a divit, so that the setscrew can 'fall into' it. Then you can get away with blue or red loctite. The best way to do that is with a diamond ball burr set for your Dremel. Just do a search for those, they're cheap and last a loong time.

[BrianG]

Originally Posted by redshift

...The best method I've found is grinding a divit, so that the setscrew can 'fall into' it. Then you can get away with blue or red loctite. The best way to do that is with a diamond ball burr set for your Dremel. Just do a search for those, they're cheap and last a loong time.

Also, to find the exact spot to grind, install the pinion so it meshes perfectly with the spur, and screw the set screw down. Then remove the pinion. The set screw should have left a tiny mark of some kind on the motor shaft you can use as a guage. Or, if that doesn't work, use a Sharpie and mark up the flat spot of the shaft. Then, install the pinion where it needs to go to and set the set screw, and then remove it. Where the screw was, the Sharpie marking should have been scuffed/removed at that spot.