lathe spindle size

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Will Bradbury

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Will
I recently bought an old atlas/craftsman lathe. I am trying to find a chuck for it and I have measured the spindle which is 1" with 9 tpi. Have any of you heard of this size? I can't find a chuck that size. Or did I count threads wrong. I have found a ton of 1" with 8 tpi. I am away from the house so I can't recount right now. Thanks, Will
 

Gunslinger

New User
Mike
Place your ruler at one of the teeth, that is your 0 point. You do not count that tooth since it is not within the inch. If you do count it then you should get 9 for a 8 tpi. Some people count the valleys between the peaks which would again give you 8 if the peaks start and stop at an inch.
This threw me also before someone explained it to me. Now it makes sense.
 

aplpickr

New User
Bill
Go to any good hardware store. Buy a 1" x 8 nut for about $2. Take it home and try to screw it on. This is a cheap test and will remove ALL doubt. :gar-La;
 
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