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  1. gringeltaube

    Garwood 20K winch mounted in frame

    It seems correct to me... 3427 in-lb /12 = 286 ft-lb.
  2. gringeltaube

    Garwood 20K winch mounted in frame

    Assuming that the rated pulling capacity (20.000 lbs) was only for the first layer of wire rope on the drum, then the required torque on the drum shaft would be 20,000 / 12 * 3.3 = 5,500 ft-lb And considering the worm gear type reduction plus all other friction losses combined, the efficiency...
  3. gringeltaube

    Garwood 20K winch mounted in frame

    I firmly believe that that winch is basically the same as the 5-tons front winch (#7412382). If so, then the (bare)drum diameter is 6 inches and the reduction ratio, 29:1. That means, for a cable speed of say 15 ft per minute (1st layer), the drum has to turn at ~9 rpm and the input shaft at...
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