Greenlee Super Tugger 6000 Series Instruction Manual page 15

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 struc-
tures illustrated.
The resultant amount of force depends on the angle of
the change in direction. A brief table is provided here;
for more details, see IM 1363 (99929988).
Greenlee Tools, Inc.
6000-Series Super Tugger
Resultant Force Table for the Super Tugger
(28.9 kN or 6500 lb Maximum Pulling Force)
Illustration
135°
Resultant Force =
22.3 kN (5005 lb)
Typical Resultant Force at Sheave
15
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
Cable Pullers
®
Angle of Change
in Direction
180°
150° 15 (3380)
135° 22.3 (5005)
120° 28.9 (6500)
90° 40.8 (9165)
60° 50.0 (11,245)
45° 53.5 (12,025)
30° 55.8 (12,545)
0° 57.8 (13,000)
R
0 (0)