Advice on TIG weld shaft worn by bushing

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I'll get a pic in the near future, but I have an old snowmobile where the rear pully shaft on one side was worn about an 3/16" off (guesstimate). Temporarily I just threw some JB weld on it. I'd like to do a more permanent fix when I get fairly comfortable (relative) with TIG.Right now the shaft is not worn all the way around. It looks as though someone sat there with a file and just filed directly down.I'm guessing what I need to do is add beads on top of each other until I am beyond the diameter of the shaft, then run on a lathe.Would like some advice, though. I am guessing the full diameter of the shaft is at least 3/4" if not an inch.Part of the worn area is right at the end of the shaft, but there is about 1/8" left (of full diameter) before the edge. I'm doing a pretty bad job describing this .I guess I don't even know what to ask other than tell you I have no idea what I'm doing . I'll go search for a pic...
Reply:I know what your describing and you have the idea right. Clean, weld, clean, weld, turn on the lath, go sledding!
Reply:Originally Posted by VPTI know what your describing and you have the idea right. Clean, weld, clean, weld, turn on the lath, go sledding!
Reply:If it's that close to the end, just weld the end too and then you don't even have to worry about warpage.  Or, you could pull a ZAP and shrink fit a sleeve.  No welding involved.My name's not Jim....
Reply:I did think of that as well but didn't mention it. Turn down the shaft some and sleeve it.
Reply:Originally Posted by VPTI did think of that as well but didn't mention it. Turn down the shaft some and sleeve it.
Reply:I agree.You're reducing the actual working diameter of the shaft although the sleeve makes it "full" diameter."Any day above ground is a good day"http://www.farmersamm.com/
Reply:Where I used to work, we got electric pump and motor shafts spray welded to build up damaged seal surfaces and journals for bearings. They machined and ground the shafts before returning  This might be an option to get done. I recon it was reasonably priced.
Reply:Originally Posted by puddytatA recipe for disaster....when you turn the shaft down there will be no integrity between the sleeve and the shaft....10 to 1 the shaft will snap off at the corner of the turned down part.........weld it up to over diam and turn it to size.Make sure you have a fixed steady on your lathe so that you can re-centre the end of the shaft which could be either wothout a centre or distorted needing to be re-cut.Ian.
Reply:Here ya go puddy..http://weldingweb.com/vbb/showthread.php...ghlight=shrinkSleeve on a crankshaft..No welding.Maybe you will learn something.Start at post # 5.....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:What is the shaft made, of welding is OK depending on material and how you maintain the integrity of the material after you weld it.  I think, as it was said, turn the shaft now then sleeve it.
Reply:Maybe there's something I'm not visualizing correct but how does a pulley shaft get worn on one quarter or one half ? Is it bent and hitting on something ?"The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:Originally Posted by SandyMaybe there's something I'm not visualizing correct but how does a pulley shaft get worn on one quarter or one half ? Is it bent and hitting on something ?
Reply:A bad bearing in a idler wheel on a snowmobile can wear just part of the shaft because it has side loads.I think people are mentioning bent/fail shafts after sleeving because they instantly think you are turning the shaft down to half its original size or something before sleeving. Most of the time the sleeve is only hundredths of an inch thick.Also there is very little force on the idlers of a snowmobile. In fact they can be totally removed and the track can just run on the slides.Weld it and turn it, sleeve it, drill it out and put a new stud in, pretty much anything will be fine in this situation.I have been abusing snowmobiles for years, I have been threw it all with a sled. Great stuff!Couple of my sleds. The 700 was the first year prototype that wasn't supposed to be sold.