Gear Ratio
| Item | Formula | Source / Standard |
|---|---|---|
| Transmission ratio | i = z2 / z1 = n1 / n2 | ISO 21771 cylindrical involute gears |
| Total ratio of gear train | i_total = product of stage ratios | GB/T 10063 gear drive terminology |
| Output speed | n2 = n1 / i | ISO 21771 gear geometry |