A dozen models of selftailing or standard winches with solid bronze drums and gearwheels, stainless steel axles and bearings. Also wire halyard winches in three sizes and other bronze hardware.
Winchrite a real cordless lightweight powered winch handle
You can use a right-angle cordless drill with this hexagonal bit to power your winches, or so say the makers.
It's not cheap, but it can sure lighten the load. The waterproof electric handle puts out a torque of 52 foot pounds, using up to 100 amps. You hold the outer end, and it does the grinding. 9-foot cord to 12-volt control box. Handles 2-speed winches. Not in Scandvik's catalog but can be found at retailers.
Powered winch handle consisting of a stainless steel socket driver combined with a high-power rechargeable drill. Makes it possible to operate a manual winch by pushing against the handle but not moving it.