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: [email protected] • Web: www.harkenindustrial.com • 031210