Posted by LJD on December 14, 2011 at 14:02:29 from (75.213.57.247):
In Reply to: OT winch on trailer posted by S2710 on December 14, 2011 at 12:14:23:
That crank winch has a low-range ratio of around 24 to 1, and a high-range ratio of 4 to 1. To use a 6 amp drill, you'd need at least a 70 to 1 ratio and they would not be fully useful. A typical 5000 lb. pull 12 volt winch is geared at 265 to 1 and draws 150 amps at 12 volts, not 60 amps at 12 volts like your electric drill will.
I've got the same winch on my trailer and love it. You hand crank that winch in low range at maybe 40-50 RPM until you get tire and the load pulls hard - then maybe 20 RPM per minute?
6 amp drill will run on a good quality 1000 watt continuous/2000 watt surge inverter.
I've had my winch in low-range pulling a tractor up the ramps and it took some arm power using the 14" long hand-crank in low range. Note that the crank has 14" of leverage and a drill turning the drum in the center will not. If you put a 14" pulley on the drum at least equal to the offset of your crank - you'd be getting closer.
What you probably need is an electric motor up in the 2000-3000 watt range to work well. At 12 volts that's going to be 250-300 amps - like a typical automotive starter motor.
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