Depending on the stress on the screw and how badly it's stripped, I would consider some Loctite; especially if you only need to do it once. Otherwise, Dave and Larry have it quite right. Don
Larry Snyder > Without having had the benefit of seeing what you're working with, > this would be the way I'd lean as well. > -ls- > > > > Dave Powers <dave.pow...@att.net> wrote: >> Howdy Corby - >> >> just a couple of thoughts. I grew up in a machine shop and am an >> aircraft mechanic. >> >> If you haven't used them before, Helicoils require a larger hole to be >> drilled and tapped, because you basically install a large threaded >> spacer into the original location with the right size inside threads >> for your original screw. It takes a somewhat expensive drill & special >> tap and insert tool to complete. >> >> Another solution - especially with metric - is to tap the holes ( only >> bad - or all - so that they all match) to the next larger Metric size >> - of the same thread pitch as original - so as not to cut across the >> original threads, but just cut the same thread pitch to the >> next size, such as from 5mm to 5.5mm or 6mm. Then you only have to buy >> a standard - not too expesive - metric tap - and some new slightly >> larger hardware. >> >> You can also consider tapping the original holes to the next larger >> SAE - probably National Fine thread - but your new threads will cut >> across the original threads slightly. >> >> It really depends on how much room you have to do the work - and how >> much strength you need - >> >> Hope this helps >> >> Dave Powers - KA0KCI >> >> >> >> >> >> >> ________________________________ >> From: Corby Dawson <cdel...@juno.com> >> To: time-nuts@febo.com >> Sent: Tue, April 13, 2010 1:03:55 PM >> Subject: [time-nuts] repairing Maser threads >> >> Hi, >> >> It does not seem Time-Nutty but I need help repairing threads in a >> mounting hole. >> >> I recently installed a new ion pump in an EFOS2 Hydrogen maser and two >> of >> the mounting holes (metric M5) >> >> have damaged threads. >> >> The bolts go in fine but wont tighten and if you wiggle the bolt you >> can >> pull it out. >> >> I've looked at the various locktight and permatex stuff but am unsure >> that they will do what I want. >> >> I'm hoping someone has experience with these and can advise me. >> >> What I hope will happen with the right product is that I apply it to >> the >> threads, screw in the bolt until it just contacts the lock washer, >> wait >> until the goop cures, and then >> >> tighten until the lock washer is compressed and the bolt is tight. >> >> Just don't know what product to try! Want to be able to disassemble >> without special tools or heating. >> >> Any help is appreciated! >> >> Corby Dawson >> ____________________________________________________________ >> Gains 625% from Killer Penny Stocks! >> Sign up for FREE alerts on the next Killer Stock. >> http://thirdpartyoffers.juno.com/TGL3141/4bc4b2233fb333a8aem04duc >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -- Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.com _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
