General Machine Products 15472 Fiber Optic Mid-Assist Capstan 25 in., 32 in. and 40 in. - Manual (Page 2)

Setting Up for Pulling
First, mount the capstan to the 2-7/16 in. (62 mm)
drive shaft. Because of the combined weight of
the drive section and the capstan drum assembled
(see summary chart below) it is recommended
that two people mount the assembled unit.
Push the drive spindle onto the drive shaft and
rotate it counter-clockwise 1/8 turn until the bayo-
net pin locks.
Now wrap the pulling rope or tape around the
working surface of the capstan four turns in an
over-wind direction. This dissipates the pulling
tension of the pulling line across the capstan's sur-
face area. When the appropriate signal comes to
begin the pull slowly start the driving shaft, rotat-
ing the capstan clockwise and gradually increas-
ing the shaft speed until the desired line speed is
obtained.
Observe the lay of the pulling line on the capstan
surface for any binding that might occur as the
tape or rope enters and leaves the capstan. If bind-
ing begins to occur the line exiting the capstan
should be manually peeled off of the capstan.
Binding can often be minimized by changing the
angle of approach of the pulling line to the cap-
stan. It is usually best to have the pulling line ap-
proach the capstan close to the inboard flange. As
the capstan rotates, the tape will move outward
along the working surface and exit the capstan.
If the pulling line tends to slip on the capstan sur-
face due to excessive lubricant, make additional
wraps until slippage stops.
Torque Limiting Models P/N 15472; 15479, 70351
& 70381
The torque limiter is cali-
brated at the factory.
This pre-set value is
stamped onto the serial
number plate. It is rec-
ommended that the unit
be subjected to a static
line pull periodically to
cause the capstan to stall
and the torque limiter to slip
for about 30 seconds only.
This will verify that the torque limiter is function-
ing and has not become frozen due to lack of use.
This is best accomplished with a dynamometer
installed in line to verify the torque limiter set-
ting. If the capstan stalls occasionally during pull-
ing due to elevated tension levels this is sufficient
to assure the user that it is working properly
Re-calibration of the Capstan Torque Limiter
The simplest and most certain way to have the
unit re-calibrated is to return it to the
factory. Here it can be disassembled
by competent mechanics with the
proper tools, the parts evaluated
for excessive wear and replaced
or reconditioned as needed and
the re-calibration performed on
our certified test stand. Please
remove and return the clutch and
spindle assembly for calibration.
Include your contact information
and the size capstan the unit is to be
calibrated for. Factory turn around
will be within 5 working days or
sooner if your needs dictate.
Summary of Model Features
How To Reach Us
Our support lines are open every USA business
day from 8:00 a.m. to 5:00 p.m. eastern time.
To reach technical support call 1-800-345-6009.
Outside of the continental U.S. call 1-215-357-
5500 ext. 409
Our FAX is always available at 1-215-357-6216.
Our email address is [email protected]
General Machine Products Co., Inc.
3111 Old Lincoln Hwy
Trevose, PA 19053
Working Dia Pull Weight
P/N In. mm Lbs-
force
new-
tons
lbs kgs
15472 25 635 600 2669 80 34
15479 25 635 1000 4448 100 45
15470 25 635 n/a* n/a* 86 39
70351 32 813 600 2669 80 37
70381 32 813 750 3336 80 37
70471 32 813 1000 4448 80 37
70472 32 813 n/a* n/a* 86 39
70473 40 1016 600 2669 135 61
70475 40 1016 1000 4448 135 61
70478 40 1016 n/a* n/a* 100 45
*Models less torque limiter: Max rated load 1500 lbs 6672 N
GMP Manual
P/N 09208