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Re: Old 3 in. CIM
If you search cd-media you should be able to find documents with motor specs from 06 and 07 (when they were legal).
From memory they were ~2700 rpm, and about 2/3 of a CIM in terms of power so ~ 450 oz-in of torque.
Andymark used to sell (maybe they have some left?) a 28T gear w/ the D shape for it.
I'd recommend using belt for the power transmission though.
The efficiency and duty cycle on them (like the CIMs) isn't great, so not sure they'd be a great choice for a continuous duty application like a lathe.
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