Gear Ratio Calculator: operating questions
Does the calculated ratio include gearbox losses?
No. Tooth count fixes the ideal kinematic ratio. Bearing, seal and mesh losses reduce transmitted power and torque efficiency but do not change the ideal speed ratio used here.
Can any tooth-count combination be manufactured?
No. Module, pressure angle, centre distance, undercut, contact ratio, profile shift, backlash and strength must be checked before releasing a gear pair.
Why can measured output speed differ from the result?
Motor slip, controller regulation, belt slip, tachometer uncertainty and additional stages can change the measured operating speed. Use speed and tooth counts from the same drive condition.
| Parameter | Unit | Example |
|---|---|---|
| Driver gear teeth | teeth | 20 |
| Driven gear teeth | teeth | 60 |
| Driver speed | RPM | 1440 |