Greenlee G10 Tugger Manuel D'instructions page 35

Cable Pulling Principles (cont'd)
Cable Pulling Forces (cont'd)
At the Sheaves
Sheaves are used to change the direction of the pull.
A change in direction creates a new resultant force
that may be greater than the cable puller's maximum
pulling force. This new resultant force exerts itself on
the sheaves, sheave anchoring system, and support
structures illustrated.
The resultant amount of force depends on the angle of
the change in direction. A brief table is provided here;
For details on calculating the resultant force for any
angle, refer to Greenlee Sheave IM 1363 (99929988).
Greenlee Tools, Inc.
G10 Tugger™ Portable Cable Puller
Resultant Force Table
(44.5 kN or 10,000 lb Pulling Force)
135°
Resultant Force
27.4 kN (6160 lb)
Typical Resultant Force at Sheave
35
Angle of Change
Illustration
in Direction
180°
150°
135°
120°
90°
60°
45°
30°
0°
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Resultant Force
in kN (lb)
0 (0)
23.0 (5180)
34.0 (7650)
44.5 (10,000)
62.9 (14,100)
77.0 (17,300)
82.2 (18,500)
85.9 (19,300)
89.0 (20,000)