Remove the allen bolt inside the Chuck first, then take the right angle portion off the drill before striking the tool (in your picture) so you do not wreck the gears in the drill. Then you can put the Chuck on the drill motor and use like a normal drill.
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We need to see the nameplate to determine the motor amperage draw. When wiring a motor only load, then #12 THHN can be loaded to 25 amps and not restricted to a 20 amp breaker.
If the amperage is not over 25 you can use #12 wire and put that on a 40 amp circuit breaker without issue. This...