The standard angle between the sides of a V belt is-

V - Belt drive

• V - belt drives are generally used when the distance between the shafts is too short for flat belt drives
• Owing to the wedge action between the belt and the sides of the groove in the pulley, the V belt is less likely to slip, hence more power can be transmitted
• The ‘V’ belts are classified into 5 groups as per IS.2494-1974 namely A, B, C, D  and E

• The nominal included angle of the V-belt shall be 40°

Advantages of V -belt drive

• It is compact, so installation is possible in limited space
• It is used when the centre distance between the drive and the driven pulleys is short
• Less vibration and noise
• Cushions the motor and bearing against load fluctuation
• Easy replacement and maintenance