what is the technique for a stripped thread in hardened material?, how to re-tap a pinion shaft threads / Tranny problems |
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what is the technique for a stripped thread in hardened material?, how to re-tap a pinion shaft threads / Tranny problems |
brant |
Oct 22 2020, 09:21 AM
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#1
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914 Wizard Group: Members Posts: 11,639 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Ok...
so I had a big transmission failure this box was built by a friend, at a clinic I'm guessing the 30mm Bolt (for the speedo drive) was not torqued correctly? apparently it came loose the stack slid and drove the brass angle drive through the back of the tail cone the little button in the picture is the plug from the magnesium tail cone but as you can see the bolt threads were heavily damaged I have a replacement bolt with good threads but the threads inside the pinion shaft received some damage also I have the correct tap but the material of the pinion shaft is so hard, that I can't get the tap to start What is the technique to thread something hardened? I'm betting the process involved heat, and softening the metal then rehardening... which may not be a good idea with a pinion shaft so I may need to build a different transmission but if I could tap this thread, I'd be willing to give this box a shot. any metal experts out there.. or machinist know if this is possible? thanks in advance brant Attached thumbnail(s) |
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