Question

A leather belt 9 mm × 250 mm is used to drive a cast iron pulley 900 mm in diameter at 336 r.p.m. If the active arc on the smaller pulley is 120° and the stress in tight side is 2 MPa, find the power capacity of the belt. The density of leather may be taken as 980 kg/m3, and the coefficient of friction of leather on cast iron is 0.35.

Option 1:
32.47kW

Option 2:
320kW

Option 3:
48kW

Option 4:
480kW​

Answer 1

Answebr:

Explanation:

Answer 2

37kW

Explanation:

Given

belt = 9mm x250mm

N = 336 rpm

∅ = 120 = 2.0943

μ = 0.35

D = 900mm

Transmitted

P = (T1-T2)x V

T1 and T2