Question

The groove angle of the pulley for V-belt drive is usually

(a) 20° – 25°

(b) 25° – 32°

(c) 32° – 38°

(d) 38° – 45°

I have been asked this question in an interview for job.

This interesting question is from V-Belts in division Belt, Rope and Chain Drives of Machine Kinematics

Answer 1

Right option is (c) 32° – 38°

The best explanation: A small groove angle will require more force to pull the belt out of the groove which will result in loss of power and excessive belt wear due to friction and heat. Hence the selected groove angle is a compromise between the two. Usually the groove angles of 32° to 38° are used.