Gear Reducer Formulas

Output torque, speed and horsepower

Gear Output Torque

Mo = Mi r μ 

where 

Mo = output torque (in. lb.- ft)

Mi = input torque (in. lb.- ft)

r = gear reducer ratio

μ = gear efficiency (%)

Gear Output Speed

So = Si  μ / r 

where 

So = output speed (rpm)

Si = input speed (rpm)

Gear Output Horsepower

Po = Pi  μ 

where 

Po = output horsepower (hp)

Pi = input horsepower (hp)

Related Topics

  • Mechanics - Kinematics, forces, vectors, motion, momentum, energy and the dynamics of objects

Related Documents

  • Gears - Gears and effort force
  • Gear Trains - A simple gear train is used to transmit rotary motion

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