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©2018 Hubbell Incorporated | Chance
®
Capstan Hoist Operating Instructions
Ten Safety Recommendations (Cont.)
NEVER OPERATE A HOIST WITHOUT THE FOOT
CONTROL.
The hoist is started and stopped by a foot operated control.
Stepping on the control starts the drum turning and
releasing pressure on the control stops the hoist.
FIVE
THREE VERY IMPORTANT THINGS TO REMEMBER
ABOUT TURNS OF ROPE ON THE DRUM:
Never add or remove turns of rope while a load is
suspended. Use the same number of turns to lower a load
as is required to raise the load. And, never use so many
turns of rope that no pull is required on the fall line to
activate the load.
If any of the above rules are broken, the operator could lose
control, or drop the load.
After the hoist, bracket, and foot control are properly
installed, you are ready to start lifting or pulling. Bring the
rope from the load through the necessary blocks and to the
capstan drum. All Chance® hoist drums rotate in a counter-
clockwise direction when viewed from the drum end. Wrap
the pulling rope around the drum in this direction starting
with the load line nearest the motor end of the drum. The
number of turns of rope around the drum is determined by
the load to be lifted.
The chart to the left illustrates the advantage of the hoist
based on the number of turns of rope on the drum. On
the left side find 3.5 turns, follow the horizontal line to the
graphed line, then vertically down to the bottom which falls
at 30. This means for every pound of pull on the fall line,
the hoist applies 30 lb. to the load line. Thus, a 600 lb. load
can be lifted with 20 lb. pull on the fall line using 3.5 turns
of rope on the drum. Select the number of turns which will
allow control of the load with 20 to
40 lb. pull on the fall line.
The graph and diagram at the left shows the capstan
principle in action. Operator effort remains low for typical
loads simply by adding wraps on the capstan drum. Very
little effort is required, any crew member can run the hoist.
Control is highly accurate, loads can be moved fractions of
an inch.
Example: 4 wraps of rope = 1:44 ratio. That is, 1 lb. pull on
fall line develops 44 lb. on load line. Therefore, 20 lb. of pull
develops 880 lb. of lift.
SIX
T1
(Load Line)
T2
(Fall Line)
