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Jaw

Elastomers

Overview

Elastomers In Compression

JW Lovejoy offers four types of elastomer designs to allow for additional flexibility in addressing specific application requirements. One piece designs are used in the “L” and “AL” models (referred to as spiders) and multiple part “load cushions” are used in the “C” and “H” model couplings. The load cushions are in sets of 6 to 14 pieces depending on coupling size. Solid Center Spider â–  The solid center design is commonly used design when shafts of the driver and driven equipment can be kept separate by a standard gap Open Center Spider â–  The open center design allows for the shafts of the driver and driven to be positioned within a short distanceOpen center spiders offer shaft positioning flexibility but have a lower â–  RPM capacity (1,750 RPM maximum for NBR, 3,600 maximum for Urethane/Hytrel
® ) Cushions â–  Used exclusively for the C and H Type couplings â–  Load cushions are held in place radially by a steel collar which is attached to one of the hubs

Spider Materials

SOX (NBR) Rubber Snap Wrap Flexible Spider â–  The standard material that is highly flexible material that is oil resistant â–  Design allows for easy removal of the spider without moving the hubs â–  Resembles natural rubber in resilience and elasticity, and operates â–  Allows for close shaft separation all the way up to the hubs maximum effectively in temperature ranges of -40° to 450° F (-40° to 232° C) bore Maximum RPM is 1,750 RPM with the retaining ring, but if used with the â–  Urethane LC Type (with collar) the normal RPM rating of the coupling appliesStyle is available in NBR and Urethane only, and in limited sizes â–  Has 1.5 times greater torque capacity than NBR â–  â–  Good resistance to oil and chemicals â–  Material provides less dampening effect and operates at a temperature range of -30° to 160° F Note: N Complete technical data for the new Jaw In-Shear elastomer is contained in the next section of this catalog, labeled “JIS” on the page tabs. Hytrel â–  Flexible elastomer designed for high torque and high temperature operationsOperates in temperatures of -60° to 250° F (-51° to 121° C) â–  Bronze â–  Rigid, porous, oil-impregnated metal insert exclusively for low speed (max 250 RPM) applications requiring high torque capabilitiesNot affected by water, oil, dirt, or extreme temperatures – operates in â–  temperatures of -40° to 450° F (-40° to 232° C) You must refer to page JW-2 (Page 14) for Important Safety Instructions and Precautions for the selection and use of these products. Failure to follow the instructions and precautions can result in severe injury or death.

WARNING

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