Cable-Laying Pulley0 pages

I n d u s t r i a l
P U L L E Y
S Y ST E M S
Cable-Laying Pulleys (Blocks)
Harken Cable-Laying Pulleys are being used by
oceanographic research vessels to safely lead
cable overboard and to deploy instruments.
Because fiber-optic cable has a large bend radius,
Harken Cable-Laying Pulleys have diameters to
suit. The aluminum sideplates and Nylatron® selflubricating sheave materials are very lightweight
and strong, optimizing cable tracking.
Uses
The sheave’s durable, lightweight Nylatron® material has high
mechanical strength and stiffness, resists static electricity,
and has excellent wear resistance.
Harken C6989, C8355, and C9417 pulleys are used for
oceanographic cable, including fiber-optic; designed to
withstand corrosive marine environments.
The sheave’s wide diameter and Nylatron’s® exceptional
self-lubricating and wear characteristics deliver cable
without damage.
FEATURES
Delrin® roller bearings are housed in a center cage to keep them
parallel for low-friction efficiency. Captive Torlon® ball bearings
handle side loads.
OPTIONS
The pulley’s large center hole moves the center of gravity toward the
shackle, improving the pulley’s ability to align with the cable under tow.
The pulley’s wide throat allows passage of wire terminals.
MATERIALS
One Allen wrench is the only tool needed
to disassemble the pulley.
UV-stabilized 6061 aluminum sideplates are deep-saturation,
Hardkote-anodized for maximum protection; Teflon®-impregnated
for a smooth, slippery surface.
All bearings are captive so there is no
worry about losing parts.
The use of Helicoils® and isolating materials between aluminum
and stainless steel components minimizes corrosion.
Sheave
Ø
Description
Cable-laying pulley
Cable-laying pulley
Cable-laying pulley
in
20.00
20.00
29.53
MAINTENANCE
Flushing with fresh water after each use
will keep the self-lubricating bearings
free rolling.
Pulleys accommodate line counter instrumentation.
Part
No.
C6989
C8355
C9417
Available in 500 mm and 750 mm sheave diameters.
Can be designed to suit your specific requirements.
Caged roller bearings
Cable
Ø
mm
508
508
750
in
5/16
3/8
3/4
Weight
mm
8
10
19
lb
42.5
42.5
143.3
kg
19.3
19.3
65.1
Maximum
working load
lb
kg
10000
4535
10000
4535
20000
9070
Breaking
load
lb
20000
20000
40000
kg
9091
9091
18182
Maximum working loads are 4:1 coefficient ratio of the breaking load. Human suspension applications require 10:1 ratio.
WARNINGS AND INSTRUCTIONS. You must carefully read, understand, and follow all of the warnings and instructions in the User Manual provided by Harken in order to
avoid an accident. Never, under any circumstances, exceed the maximum rated load.
1251 E. Wisconsin Ave., Pewaukee, WI 53072 USA • Tel: 262-691-3320 • Fax: 262-691-3008 • Email: harken@harken.com • Web: www.harkenindustrial.com • 031210