Overall Transmission Ratio i, Calculating

Overall Transmission Ratio i, Calculating

Example:






i = Z2 : Z1 *

iG = gear ratio = ZG2 : ZG1 = 29: 39= 0.744

iA = axle ratio = ZA2 : ZA1 = 61 : 18 = 3.389

itotal = total ratio = iG x iA = 0.744 x 3.389 = 2.521

• * Z1= number of teeth on the drive gear, Z2= number of teeth on the driven gear