Material:
A 500W / 127V drill, a 12V battery, a 12V / 127V inverter and a bell switch.
Motor:
It would be a drill 500W / 127V / 2800rpm
As 1rpm = 0.105 rad/s and W = Nm x rad/s:
500 = Nm x 2800x0.105, So I would have 1.7 Nm of torque.
By connecting a long shaft to the drill chuck and rolling it...