4024, 4036, and 4048 Conveyor Sheaves
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
4
Hook Load
Two variables interact with the sheave to produce a
resultant (total) force, or hook load. This load, repre-
sented by
R
in the formulas and illustrations, is exerted
on the hook, anchoring, and structural support.
R
T
T
R = the resultant force, or hook load; this force is
exerted on the hook, anchoring, and structural
support
θ
= the angle of change in rope direction
T = the tension exerted on the rope by the cable
puller
Sheave Forces
Reference Table
Illustration
θ
R
T
T
R = 0
180°
0
150°
0.52 x T
135°
0.77 x T
120°
1 x T
T
T
R = 1.41 x T
90°
1.41 x T
60°
1.73 x T
45°
1.85 x T
30°
1.93 x T
T
T
R = 2 x T
0°
2 x T