Need 2-1/16" - 16 Thread Die to Repair Model 50 Crankshaft

del7317 · Oct 17, 2015

Anyone have a 2-1/16" - 16 thread die? I need one to repair thread damage on a JD model 50 crankshaft.

Thanks,
Daryl

LD1 · Oct 17, 2015

Depending on how bad the threads are, might try a thread file

SPYDERLK · Oct 17, 2015

A tool like this is what you need. Threadmaster. Works great. - Doesnt cut. ... Re forms the thread.

American made. Patent # 3.793.659 ... Unfortunately they apparently only made one size - covering 1/4 to 1" thread, and it didnt catch on. I think H&S Company is out of business.

Threadmaster 1/4"- 1" By The H&S Company for Sale - electronic-circuits-diagrams.com

... ... Progress integrated over time = zero

ruffdog · Oct 17, 2015

If the damage is extensive, a machine shop with a large lathe can recut the threads to match the existing threads. Match the pitch behind the damage and single point cut toward the end.

del7317 · Oct 18, 2015

I tried a thread file with no luck. The shaft is just to hard for a file to repair the damage thread. I actually found a thread die on Ebay the correct size but it was a 12 TPI instead of 16. I am trying to avoid pulling the crankshaft out, but that may be the only way to get it repaired. I am not 100% sure a thread die will clear the threads up but wanted to try that before pulling the crankshaft. Thanks for the replies.

Daryl

LD1 · Oct 18, 2015

IF a thread file isnt touching it a die wont either. Was this a good brand thread file? or a cheapy HF?

Cranks shouldnt be too hard to cut with a file.

SPYDERLK · Oct 18, 2015

del7317 said:
I tried a thread file with no luck. The shaft is just to hard for a file to repair the damage thread. I actually found a thread die on Ebay the correct size but it was a 12 TPI instead of 16. I am trying to avoid pulling the crankshaft out, but that may be the only way to get it repaired. I am not 100% sure a thread die will clear the threads up but wanted to try that before pulling the crankshaft. Thanks for the replies.

Daryl

These silicon carbide/Crystolon stones will cut it. Check triangle shape - product # 4346A22

McMaster-Carr

Tractor Seabee · Oct 18, 2015

I have a pretty extensive catalog of machine tools and their accessories. 2 1/16-16 is a non-standard thread. 2 1/16-14 is. Are you sure of the thread OD and tpi? 2" OD comes in 8-12-16-and 20 TPI. A standard 2" die is $80 and jumps to $115 for a 2 1/16-14.

Do you have an industrial/machine production jobber/supplier in your city? They should be able to do a match up using the part with the female thread if it is a standard thread, otherwise it is a machine shop job. Around here just the set up fee for a one time job at a machine shop is $150-$200.

Ron

Ron