Craftsman 101.07301 Spindle Thread Question

[william3954]

Hello,
Does anyone know what size thread is on the end of the spindle (circled in red)?
Thanks in advance

 

[LF_WS]

Mine looks to be 16 TPI, with diameter of the spindle at tops of the threads of ~3/4" This threaded end of the spindle is made to accept collar M6-32.
I see there's a standard fine (NF) thread of 3/4-16, for what that's worth.

 

[benmychree]

It appears that the parts sheet is for a anti friction bearing, the one pictured is a plain bearing machine (if that matters).

 

[mickri]

Welcome to the forum.

The outer end of the spindle on my craftsman 12x36, model 101-28910 is 1.250 x 20 tpi.

edit: Oops. Me bad I didn't realize you had a 6" craftsman lathe.

 

[RJSakowski]

The unthreaded portion of the spindle on my Atlas/Craftsman 6x18 measures .750" Over the threads, I measure .728" A 3/4-16 tap will start but not get past the taper on the collar and I can't start a 3/4-16 die on the spindle thread. .728" seems undersized for a 3/4-16 thread. The definitive procedure would be to measure the pitch diameter.

 

[RJSakowski]

I double checked the thread o.d. under the gear and it measured .7486". I also confirmed a 16 tpi pitch.My lathe model is 101.214 and the parts diagram is the same as in post #2 above.

 

[LF_WS]

William3954 - Just out of curiosity, why did you inquire about the size of the outboard thread? Are you missing collar M6-32 and trying to replace or fabricate it, or? Inquiring minds and all that...

 

[wa5cab]

RJ,

Minor point but there should be 4 or 5 digits following the period or decimal point in the model number, not 3.