John Doe wrote:

What might be the typical rpm of a cordless drill motor?

Or what is the typical gear ratio?

Some single speed spin up to about 700 rpm at the chuck.
Dual speed usually go up to about 400 and 1400 rpm at the chuck.

Thanks.
I think you'll find it to be more like
no more than 400 on torque mode and maybe
900 or so on speed mode at the chuck..





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