smo Posted March 20, 2009 Share Posted March 20, 2009 I'm working on the D-Lander using lots of fittings however im having particular problems with my steel rivnuts (fitted with proper rivnut tool) and the stainless steel button head bolts. Even when screwed in by hand, 50% of them sieze solid - one managed this after just 30 seconds it was stuck so hard i sheared it off trying to remove it. WHY do they keep doing this, steel+stainless are compatible, im not putting them in tight, or cross threaded but they still sieze solid. HELP! Quote Link to comment Share on other sites More sharing options...
SIMEXSLAVE Posted March 20, 2009 Share Posted March 20, 2009 I'm working on the D-Lander using lots of fittings however im having particular problems with my steel rivnuts (fitted with proper rivnut tool) and the stainless steel button head bolts.Even when screwed in by hand, 50% of them sieze solid - one managed this after just 30 seconds it was stuck so hard i sheared it off trying to remove it. WHY do they keep doing this, steel+stainless are compatible, im not putting them in tight, or cross threaded but they still sieze solid. HELP! Hi I had the same problem until I put copper slip on the bolts, it seems that stainless likes lubrication going into any material !! Quote Link to comment Share on other sites More sharing options...
smo Posted March 20, 2009 Author Share Posted March 20, 2009 I normally do but i thought for a 20 second fit whilst i drilled another hole it would be ok...how wrong i was! Quote Link to comment Share on other sites More sharing options...
andyb Posted March 20, 2009 Share Posted March 20, 2009 it seems that stainless likes lubrication going into any material !! snigger I'm a complete copper ease junkie. Get Comma spray cans of the stuff from the local motor factor. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 20, 2009 Share Posted March 20, 2009 If there's grinder dust / metal in the threads it will pick up and jam. Quote Link to comment Share on other sites More sharing options...
Mark Posted March 20, 2009 Share Posted March 20, 2009 stainless can be a bit grabby as a material anyway, but is it worth checking your rivnut tool - it may be that you are slightly over compressing the rivnut, making it a tight thread? Might be worth running a tap down the rivnut before running the bolt into it? just a couple of thoughts... Mark Quote Link to comment Share on other sites More sharing options...
smo Posted March 20, 2009 Author Share Posted March 20, 2009 Cheers guys, i shall get out the copper grease, run a tap down them first and check the tool setting, i know they are dust free as they are coming out the box but will even blow them through first to make sure Quote Link to comment Share on other sites More sharing options...
51bigG Posted March 20, 2009 Share Posted March 20, 2009 I would agree with what others have said, tool might be a problem but always best to run a tap through the nut b4 you put in the bolt. Quote Link to comment Share on other sites More sharing options...
smo Posted March 20, 2009 Author Share Posted March 20, 2009 I've adjusted the tool slightly, got the tap out and found my copper grease....no siezed bolts this afternoon thankfully Quote Link to comment Share on other sites More sharing options...
jil6939 Posted March 20, 2009 Share Posted March 20, 2009 There is a name for this but i cant think what it is so thats no help really. I thought it only happened to ss/ss not to ss/mild and it happens when the top coat of the ss is rubbed off and causes it to "weld" to itself. Puting some lub on them should remove the problem. Quote Link to comment Share on other sites More sharing options...
Night Train Posted March 20, 2009 Share Posted March 20, 2009 I found this problem as well when I first used rivnuts and SS screws. Copper grease sorted it then too. I think it is a SS issue. Quote Link to comment Share on other sites More sharing options...
waveydave Posted March 20, 2009 Share Posted March 20, 2009 SS is a pain in the but to use. As above i always run a tap down the thread and i often run a die down the bolt as they can be just as bad. Make a construction with SS take a little longer but having dril and retap a cage takes even longer, but then as i no longer work for an ass with a stop watch who cares. Oh yes plenty of copper ease too. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted March 20, 2009 Share Posted March 20, 2009 There is a name for this but i cant think what it is so thats no help really. I thought it only happened to ss/ss not to ss/mild and it happens when the top coat of the ss is rubbed off and causes it to "weld" to itself. Puting some lub on them should remove the problem. Give that man a cigar! Smo, you are experiencing 'galling', one of the characteristics of s/s. Google it, there's loads to read. Quote Link to comment Share on other sites More sharing options...
smo Posted March 20, 2009 Author Share Posted March 20, 2009 Hmm, Galling huh, i had several names for it earlier and that wasnt one of them Quote Link to comment Share on other sites More sharing options...
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