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) |



