1933 craftsman wood lathe

If you think the thread is a 1" 8 tpi that is logical. You should count the threads for 8 or 10. Likely 8. Rare 10.

You should be able to find wood chucks with 1" 8 tpi at various woodworking stores.

Martin

Reverse thread would be expected on the outboard end (if there is an outboard end), very unlikely on the inboard end, as it would tend to unscrew in use unless the whole lathe is backwards. i.e. headstock to the right of the worker rather than the normal headstock to the left of the worker - and that would be extremely unusual to the point that I have never seen one. Possible that (if it is a double-ended headstock) someone "restored" it and put the headstock on (or spindle in) backwards?

Regardless, there are about a billion 1" x 8 LH, RH and L&R H (double-threaded) accessories available, as it was and is a dirt-common spindle size.

I had a Sears lathe when I started turning and it was 3/4"x16tpi. Graham

Thank you for all the help. I had the shaft slipped the spindle I need to attach a Chuck too is smooth with a notch for a set screw. I cannot find any slip on chucks or something I can turn pen blanks with

Chucks screw on and when the work is cutting it makes the chuck tighter on the shaft. I have a pre-WWII lathe that has a 1x10 thread and the chucks I found just screwed on and worked just fine. Only when going backwards would it screw off.

Someone likely put a screw 'hole' for a center and a DOG. The dog is attached to the center (or chuck...) by a tough screw and then to the threaded / and covered screw. The dog must rotate.

A tail stock dog latches onto the tail stock with an arm and cener/drill/etc with an angle and screw.

Suggest you look up some old manuals for how some of this stuff worked.

Old timers didn't have wood chucks or chucks other those made from wood.

Martin

You might try posting your question here-