Calculation
M₂ = M₁ · i · η
Reduction increases torque with ratio; losses reduce usable output.
M₂ = M₁·i·η
Gearbox output torque
Reduction increases torque with ratio; losses reduce usable output.
MINTSI
02
Result
Select a target and calculate.
Understand the inputs
- Output torque M₂ — Usable output shaft torque.
- Input torque M₁ — Torque at input shaft.
- Gear ratio i — Speed ratio n₁/n₂.
- Efficiency η — Fraction of ideal power transmitted.
Example
100 N·m · 2.5 · 95% = 237.5 N·m.
Assumptions and limits
Constant ratio; load peaks and gear-face factors are excluded.
Sources