Describe Gear transmission: Component, application, advantage and disadvantage.

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Accepted Answer

## Answer

### Gear Transmission

**Components:** Pinion and gear (spur, helical, bevel, worm) meshing teeth on pitch circles. Velocity ratio $i=Z_2/Z_1$, torque $T_2=T_1 i \eta$.

**Working:** Teeth push, positive drive, no slip.

**Advantages:** High power, precise ratio, compact, high efficiency (95%), long life.

**Disadvantages:** Costly, noise, backlash, lubrication needed, fixed centers.

**Applications:** Robot gearbox, differential, CNC, automotive.

**Final:** Gear teeth positive drive $i=Z_2/Z_1$, precise high power but noisy and backlash.

Answer