• Step 2 - Calculating horsepower using graphs provided
By interpolating the maximum allowable force in Table 1
tangential force = 400 N
H.P. =
TANGENTIAL FORCE X PULLEY DIA. X rpm
14.34 X 10-6
H.P. =
400 X 49.49 X 1750
14.34 X 10-6
H.P. = 2.41
therefore belt/pulley selection can transmit:
3/4 H.P. with a theoretical safety factor of 3.21
1800
1600
1400
1200
1000
800
600
400
200
rpm
TANGENTIAL FORCE VS. rpm
FOR 2-ROW BELT & PULLEY SYSTEMS
0
1000
2000
1750
3000
4000
5000
24
12
8
16
2022
14
10
18
NUMBER OF TEETH ENGAGED PER
ROW ON SMALLEST PULLEY (DRIVER)
6
• Table 1
2-TMP011 3-19-07 JC
