doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Repairing sear's...

Is tig welding and re-fitting an approved way of rebuilding worn sear's ? ,the gun is a cheap Brazilian .410... garbage straight from the factory the sear's are so soft the arm's could be bent between finger and thumb,new part's have for a year and a half proven impossible to locate.

Any help apprciated

Don't repair them. Use them as patterns to make new ones out of good steel. If you can't make them, see a local machine shop or toolmaker. The problem is the tumblers might be soft too. This can start a chain reaction as the new hard parts wear out old originals. Good luck.

Newf:
An intriguing question, indeed. Kind of like asking how much money and effort one needs to expend in order to turn a Yugo into a Ferrari.

If it's your gun, I'd scrap it and put your resources into something more worthwhile.

Best, Kensal

nooooo its like asking how much it will cost to fix a yugo.check and see what conditon the related parts are in. then make new parts. you could try heating the parts red and quenching in water to see if the part hardens then draw the temper, this may be more complicated than your abilities but at least you would know where you stand.this isnt intriguing or diabolical its fixing a broken gun thats it

Does the part change shape/dimension from bending or is wear the problem? If bending, make a new one of SAE 1040, or better, steel. If wear, try through heat treating as above. If that doesn't work, then case harden. Soft on soft is not a good bearing arrangement. Hard on soft works if kept properly lubed; sear/tumbler should not be a high pressure application, so any decent lube should have sufficient film tension to avoid metal to metal contact.

Ditto what Mr. Hughes said.

What did he say, anyway?

Interesting checkering job. I've never seen chamber porting before.....is that proprietary?

I am usually simply amazed by Mr. Hughes' work. In fact, I still am!!
That work also is amazing, for different reasons.

I apoligize Mr.Hughes....I am puzzled by your response,in the meantime the repair was made before I asked the question and was sucessful,the tumbler's were indeed hardend the build up of metal was seamless and everthing work's quite well.....the gun was really only fit for part's but the owner wanted it up and running so I only fitted the part and reassembled the gun for him
Thank for all the reply's

Glad it worked out Newf. I've repaired some shakey stuff and learned a bit while doing it. If only we could always work on the really good stuff, but the good stuff rarely needs work.