Odd Spindle Thread Size Identity ???

[clm1899]

Hello all, I purchased a box full of tools at a yard sale this past weekend and there's a lathe chuck backing plate with an odd size. It is 7/8" x 10 tpi and is 5" in diameter. I'm curious as to who made a lathe with this spindle size. A 5" chuck seems awfully large for such a small spindle. Thanks

 

[twhite]

Could be from a wood lathe


Cutting oil is my blood.

 

[clm1899]

Here’s a couple photos of it.

 

[twhite]

Good thing is you can make a backplate and have a 5” chuck for your lathe. I really think it is from a wood lathe.


Cutting oil is my blood.

 

[benmychree]

That was also my thought, wood lathe.

 

[RJSakowski]

The Atlas/Craftsman 6 x 18 has a 1"-10 tpi spindle. The root diameter of the thread is close to 7/8".

 

[twhite]

The Atlas/Craftsman 6 x 18 has a 1"-10 tpi spindle. The root diameter of the thread is close to 7/8".

You are probably correct.


Cutting oil is my blood.

 

[clm1899]

no, its definitely not for a 1" spindle. I guess I'll post on a woodworking forum.

 

[markba633csi]

If the unthreaded section is 1" then yeah, Atlas. Otherwise not

 

[clm1899]

Just to prove to myself (which I didn’t have to do). I turned a scrap piece of aluminum 7/8” or .875” and then single point 10 tpi into it, and voila. It fit like a snug bug in a rug. So now if anyone knows what lathe spindle this will fit, it’s available.