#### Three Gears or Pulleys Force Calculations and Equations

Use the following equation to determine the lifting force of the selected gear or pulley arrangement . A, B, C and D are the pitch circles of gears or pulleys. F = [ W x r x r W = [ F x R x R Where: W = Unknown weight (lbs, N) Let the pitch diameters of gears A, B, C and D be 30, 28, 12 and 10 inches, respectively. Then: R2 =
15; Then the force F required to lift a weight W of 2000 pounds, friction being neglected, is: 95 lbs 1 lbs = 4.4482216 Newtons Related:
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