HP & Rotation

  • Mechanical Hp = Torque (ft-lb) x RPM / 5252
  • Typical gearbox efficiency can be assumed as 90%

Motor/pump shaft rotation is determined by
looking at the shaft end of the device
Two shafts pointing the same direction, when
coupled with belt and pulleys, need to turn in
the same direction
When coupling two devices with shaft couplers
one shaft must turn counterclockwise (CCW)
while the other must turn clockwise (CW)
Standard four-cycle gasoline and diesel engine
shafts turn counterclockwise (CCW)