User:Sums2107/Design of multi speed gearbox

If gear box operates with more tha one speed ratio or gear ratio, it is called as multi-speed gearbox.

'''''''Need of Multi-speed gear box in machine tools:''''''

The machine tool need to operate with different spindle speeds. However, the prime mover, which is an alectric motor, operates at a single constant speed.

Therefore, for obtaining number of output speeds with a single input speed, the miulti-speed gearbox is required in machine tools.

Bsic considerations in design of multi-speed gear-box: