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Axle Shaft Thread Restoration

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D13

10-20-2001 18:20:06




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My Allis B has about a 1 1/2" diameter axle. The wheel and bull gear mount to the axle via tapered splines, and are locked to the spline by a lock washer and nut. The threads and nuts on the bull gear side run in oil. These nuts came right off (after making a thing wrench that size!) and the threads looknperfect, I can spin the nuts from the bull gear or wheel side onto the threads with no trouble.
The axle side required Mr. Acetylene Torch, 3' pipe wrench, 3' cheater, 225# me, and much cussin' before they came off. I ruined 2 of the 4 (I'm swapping final drive parts to make a good tractor from 2 wrecks). The threads on 2 of the axles are so corroded past the nut htat they are not worth saving. The other two are still threaded but the nuts will not thread on. Below the nut they obviously have corrosion.

How do I get my threads back without buying a die for this monsterously large thread? I did find hex nuts in this size - should I notch them, use the inside of the junk axles to retrue the threads, and try to use them as dies? Help! Otherwise I'll have to use the torch to put them on and my nice shiny wheels are not going to survive the experience...

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Kelvin

10-26-2001 13:03:42




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 Re: Axle Shaft Thread Restoration in reply to D13, 10-20-2001 18:20:06  
I understand that the shaft is out of the tractor. Before I got real mean with it, I would take the shaft to a wire brush and get as much rust off the threads as I could. I would also take a wire brush and clean the threads on the nut and see if that does the trick. Penetrating oil that dissolves rust would help, too.



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Chris C.

10-24-2001 16:50:18




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 Re: Axle Shaft Thread Restoration in reply to D13, 10-20-2001 18:20:06  
Snap On makes a nice little knife style thread file ground at the proper 60 deg. angle. It works on metric and SAE threads and is great for really big threads that the little square thread files don't have the correct pitch for.



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Dick L

10-24-2001 07:41:14




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 Re: Axle Shaft Thread Restoration in reply to D13, 10-20-2001 18:20:06  
I use an 8" knife file for that type of reworking threads. A little 6" knife file will work as well but is a little harder to hold the correct angle. I have the thread files but only use them on small dings. For the real bad threads, I trace the threads on a lathe.



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CJ

10-21-2001 15:36:26




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 Re: Axle Shaft Thread Restoration in reply to D13, 10-20-2001 18:20:06  
Get yourself a thread file and clean up the threads. The file is square with each side made to match a different pitch thread. Another way is to thread on the nut as far as it will go then tap hard with a hammer on each flat. The thread will reshape to match the nut. Then turn it on a little further. Keep doing this till you get the nut all the way on.



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Alberta Mike

10-20-2001 20:37:52




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 Re: Axle Shaft Thread Restoration in reply to D13, 10-20-2001 18:20:06  
Had a '51 Dodge pickup about 10 years ago and the outer threads on the rear axel shaft were toasted. Got out the shaft and like the other post, took it to a machine shop. He couldn't rethread the original size (not enough steel left) but went to the next size down which happened to be metric so he threaded a metric size and that one side had a metric nut. When I sold the truck, I made sure that the new owner was informed about the size change.

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Chums5

10-20-2001 18:37:50




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 Re: Axle Shaft Thread Restoration in reply to D13, 10-20-2001 18:20:06  

Hey there D13.....I had the same problem on an F-30 restoration only the threaded shaft was 2" fine threads.....check out you local machine shops.....the one I found was ready to turn new threads on the lathe and the owner found a die to chase them...but did it on lathe so they were true and straight.....and got away for only $35..... .Good Luck....



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bob

10-21-2001 17:59:48




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 Re: Re: Axle Shaft Thread Restoration in reply to Chums5 , 10-20-2001 18:37:50  
thread file will work real good another thing with nut and hammer you can get some lapping compound and keep moving nut back and forth but don,t get rammy as you can seize it. if threaded shaft is undersized you can get machine shop to spray and then cut new threads on lathe



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