[Mike Betts]

Jack,

There are many ways to skin a cat... Mike's relay diagram will work, however, I'd add a circuit breaker in series with the battery (at a minimum).

I agree with greencactus in that a drill motor draws over 100 amps at stall conditions. It sounds like a window or seat is more applicable.,, In fact, I'd recommend a pneumatic system for this task. It would be safer and very entertaining when the cylinder actuates.