Two pulleys one 450 mm diameter and the other 200 mm

diameter are on parallel shafts 1.95 m apart and are connected

by a crossed belt. Find the length of belt required and angle

of contact between belt and each pulley.

Estimate the power transmitted by belt when the larger pulley

rotates at 200 rpm. If the maximum tension in the belt is

1 kN and coeff of friction between belt and pulley is 0.25.

Two pulleys one 450 mm diameter and the other 200 mm diameter are on parallel shafts 1.95

m apart and are connected by a crossed belt. Find the length of belt required and angle of

contact between belt and each pulley. Estimate the power transmitted by belt when the

larger pulley rotates at 200 rpm. If the maximum tension in the belt is 1 KN and coefficient of

friction between belt and pulley is 0.25.

Given Data:

Crossed Belt Drive

D 1 = 450 mm = 0.45 m

D 2 =200 mm = 0.20 m

C = 1.95 m

N 1 = 200 rpm

μ = 0.25

T 1 = T max = 1 KN = 1000 N

L Cross = ?

Θs = ?

P = ?

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