base circle

pitch circle

prime circle

pitch curve

10 m/s

12.5 m/s

15 m/s

20 m/s

velocity of the belt

tension under which the belt is placed on the pulleys

arc of contact between the belt and the smaller pulley

all of the above

Bushed pin type coupling

Universal coupling

Oldham coupling

all of these

reduce vibration

reduce slip

ensure uniform loading

ensure proper alignment