What is thread size on a 1931 rear axle that hub bolts to.
 

Would like to find a die to chase the threads on a 31 rear axle. Over time the threads have been hit and need to chase then with a die. Know where I can purchase a die, thanks.

Re: What is thread size on a 1931 rear axle that hub bolts to.
 

You don't necessarily want a die. Using a die removes material on a thread that likely was made slightly "oversize" and to match the mating nut.

The threads were originally "rolled" to take advantage of the "grain" of the metal for strength. Cutting the thread removes/interrupts the grain and weakens the thread.

Instead you need to "reform" (press) the thread using a tool made for the purpose. Picture of this tool below. They appear on Ebay on occasion and if you are part of a club or have "contacts" someone may be able to help.

https://i.ebayimg.com/images/g/Gf4AA...ifO/s-l400.jpg

At least three seen on Ebay currently ranging in price from $23 to $49. Search term "antique thread restorer."

Joe K

Re: What is thread size on a 1931 rear axle that hub bolts to.
 

What Joe K said. But the thread size is 5/8-18

Re: What is thread size on a 1931 rear axle that hub bolts to.
 

This is the correct tool to chase the threads on an axle.
Start at the good threads and work out to the end of the axle.
https://www.ebay.com/itm/33606389231...NKKAZZ2DXRJTPF

Re: What is thread size on a 1931 rear axle that hub bolts to.
 

Yes 5/8-18, but also many back in the day were "fixed"by recutting to 9/16-18 so watch for that :)

Re: What is thread size on a 1931 rear axle that hub bolts to.
 

If it is still stock, you could use one of these:

https://www.langtools.com/sku-51-264...ng-die-5-8-18/

Re: What is thread size on a 1931 rear axle that hub bolts to.
 

Keep in mind that if the tool involves removal of metal - then you probably don't want to use it - my comment above.

There are more modern "thread reforming tools" that are probably available in a cardboard hung "bubble" at your local auto support store. Pictured below.

https://www.mcmaster.com/mvD/Content...=ImageNotFound


Joe K