Introduction ® TRASCO ES Zero Backlash Jaw Couplings ® TRASCO ES is the zero backlash coupling designed to compensate for misalignment and vibration dampening for indexing applications. The compact ® design of TRASCO ES makes it the right choice for all precise motion applications. Description® The TRASCO ES consists of two hubs, which are either made of high-strength aluminum (up to the 38/45 size) or steel (from size 42) that are connected with ® an elastic element. The precise dimensional characteristics of TRASCO ES are obtained through our accurate machining process. The special compound polyurethane elastic element, developed through extensive research and laboratory testing, is made through a press-forming process which guarantees high dimensional accuracy. The element is available in 4 different hardnesses: 80 Sh. A (blue), 92 Sh. A (yellow), 98 Sh. A (red), 64 Sh. D (green). Coupling performance depends on the type of element selected Other hardness values for coupling elements are available upon request to meet special (see “Technical characteristics, page 3”). operating conditions, such as high temperatures and/or high torques, and for providing a high degree of vibration damping capability. Please contact jbj Techniques Limited technical office, telephone +44 (0)1737 767493 or email: info@jbj.co.uk for help in selecting the appropriate element hardness. Spider Elements The gear ring is made of a particular polyurethane resin which shows great advantages in comparison to the standard polyurethanes available on the market. The urethane compound of these coupling elements offers resistance to aging, hydrolysis, fatigue, and abrasion making it suitable for even the most demanding applications in high humidity conditions. It is self-dampening and shows a great resistance to the main chemical agents, acids, oils, and ozone. Special types of gear rings are available in order to provide the right solution for each specific application covering a large range of temperatures and resisting specific chemical agents. Hub Spider 1 www.jbj.co.uk/couplings.html #DriveLineHarmony
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