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Re: Antique Safe Wheel

Posted by Dave LaBarge, CPS-CML-CMS on August 22, 2010 at 09:18:42:

In Reply to: Antique Safe Wheel
posted by
Steve, Kansas City Area on July 28, 2010 at 20:14:28:


Set the safe on it's back and heat up the square bolts with a torch let cool and see if they loosen. If not try Kroil after it cools and let it set for a couple of days that may help.

Many older threads had much tighter tolerances due to being "hand chased". Modern screw threads only "catch" the surfaces about 75% compared to older "Full Threaded" bolts. A "Full Threaded" bolt can cause what machinists call "Body Bound" or having threads with a very tight fit...

Dave LaBarge, CPS-CML-CMS

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