Dimensions of rear spindle 1940

parkerm

Can anyone tell me the dimensions, i.e., diameter of the rear spindle on a 1940? I assume they were probably the same for several different years.
I put a digital caliper on mine and it read .75 or 3/4", but I need to confirm that is correct.

Thanks

bob ward

3/4'' is correct, the thread is finer than a standard UNF thread. 

Uncle Josh

3/4-20 Extra Fine NEF

ESSX28-1

I got mine from Rock Auto - look for spindle nut for 56 Olds

parkerm

Thanks guys, I appreciate this info. Uncle Josh, I need to repair the threads on the spindle and I am trying to find a thread chaser to fit. I have been speaking with Thread Tool Supply; I will ask if they have a thread chaser of that size.

Uncle Josh

https://www.amazon.com/s/ref=nb_sb_ss_i_4_7/131-7392932-5812942?url=search-alias=aps&field-keywords=3/4-20+die&sprefix=3/4-20+,aps,180&crid=2H02YXG2DWP60

35 Terraplane

You may be able to dress them with a thread file
https://www.mcmaster.com/#thread-repair-files/=186pcxa

bob ward

If the thread damage is severe and its hard to pick up the starting point on the thread, you may be better of with a 2 piece thread restoration die, you clamp the die onto the good thread and wind it off across the damaged thread. These were quite common once but the only seller I can find with a quick google is these guys https://www.jmeinnovations.com

A good old fashioned 20 tpi thread file may do the trick http://www.webbikeworld.com/motorcycle-tools/thread-file/

Or you can DIY your own split die. Buy a 3/4" x 20tpi hex die, cut it in half with a 1mm cutoff wheel and mount it on the good threads. A socket will hold the 2 halves together and give you a means of winding the die. Oil the threads first.