Diomedes Posted August 16, 2008 Share Posted August 16, 2008 I guess I must be doing something stupid. I weld a threaded lug into/onto a tube, and let it cool. I then put a bolt *all the way into the lug with my fingers*, no resistance, but then when I go to take it out, it seizes and strips the thread. What the hell is going on here? Quote Link to comment Share on other sites More sharing options...
NCchris Posted August 16, 2008 Share Posted August 16, 2008 What the hell is going on here? Perhaps the welded nut was not as cool as the bolt and continued to cool and thereby contract after you inserted the bolt??? Also sounds like a stainless fastener, I've had them do that on a standard (not welded) application. Try using some anti-sieze compound. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted August 16, 2008 Share Posted August 16, 2008 first any welded part with threads needs to cool to room temp THEN have an oiled thread tap run thru the threads to chase them to spec. next "Try using some anti-sieze compound." or loctite or oil (depends on application)on all threads Quote Link to comment Share on other sites More sharing options...
Diomedes Posted August 17, 2008 Author Share Posted August 17, 2008 thanks, guys Quote Link to comment Share on other sites More sharing options...
blueovalz Posted August 17, 2008 Share Posted August 17, 2008 My practice is to place a bolt into the threads prior to welding, and then remove it just after the welding is finished. I've never had this situation cause the seizing of the bolt, and it protects the threads from an errant dingleberry attaching itself onto a thread not seen. Quote Link to comment Share on other sites More sharing options...
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