Calculations

Calculations

Transmission ratio "i," Computing

Transmission ratio

Transmission ratio = No. of teeth on driven gear : No. of teeth on drive gear

Ratios Formula

- IG = gear ratio ZG2 : ZG1

- IA = axle ratio ZA2 : ZA1

- IOV = overall ratio iG x iA

Example:

5th Gear Final drive

- Drive gear ZG1 = 38 ZA1 = 10

- Driven gear ZG2 = 30 ZA2 = 37

Calculating:

- IG = 30 : 38 = 0.789

- IA = 37 : 10 = 3.700

- IOV = (30 : 38) x (37 : 10) = 0.789 x 3.700 = 2.921