Jaw Coupling
28Pages

■■ RRS and RRSC Types - Spacer ■■ C and H Type - Medium / Heavy Duty

Safety Warning When using Lovejoy products, you must follow these instructions and take the following precautions. Failure to do so may cause the power transmission product to break and parts to be thrown with sufficient force to cause severe injury or death. Refer to this Lovejoy Catalog for proper selection, sizing, horsepower, torque range, and speed range of power transmission products, including elastomeric elements for couplings. Follow the installation instructions included with the product, and in the individual product catalogs for proper installation of power transmission...

The Jaw Type couplings from Lovejoy are offered in the industry’s largest variety of stock bore/keyway combinations. These couplings require no lubrication and provide highly reliable service for light, medium, and heavy duty electrical motor and internal combustion power transmission applications. ■■No metal to metal contact ■■Fail-safe – will still perform if elastomer fails ■■Resistant to oil, dirt, sand, moisture and grease ■■Most types available from stock in 24 hours L Type ■■ oupling offers standard shaft-to-shaft connection for general industrial duty applications C The Lovejoy Jaw...

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 ■■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 ■■The open center design allows for the shafts of the...

Jaw Type Coupling Selection Process JW Selection Process Information necessary before a coupling can be selected: ■■Shaft sizes of driver and driven equipment and corresponding keyways Formulas: Nominal Torque = in-lb = (HP x 63025) RPM Nm = 9550) (KW x RPM ■■Application description Design Torque = Nominal Torque x Application Service Factor List of Charts provided for Selection: The selection process for determining the proper jaw coupling size and elastomer requires using the charts shown on the following pages. There are three components to be selected, two hubs and one elastomer. When...

Selection Example Step 7: Using the UPC number Selection table, locate the appropriate Lovejoy UPC numbers. The L Type Spider Table (page JW-10), and the L Type hub table (page JW-11), provides easy reference to the Lovejoy UPC numbers. Step 3: Calculate the Design Torque of your application: Design Torque = Nominal Torque x Application Service Factor = 700.28 x 1.25 = 875.35 in-lb Locate the L Type Spider Table (page JW-10). The spider is selected by scanning down the type column and locating the NBR (Solid) entry. Read across to the L190 column and locate the Lovejoy UPC number of 12274....

Application Service Factors Application Service Factors Reciprocating Engines* Steam Turbines & Engines w4 or more cyl* Electric Motor w/ Standard Torque Electric Motor w/ High Torque Service Factors Reciprocating Engines* Steam Turbines & Engines w4 or more cyl* Service Factors Electric Motor w/ Standard Torque Reciprocating Engines* Steam Turbines & Engines w4 or more cyl* Electric Motor w/ High Torque Electric Motor w/ Standard Torque Service Factors Caution: Applications involving reciprocating engines and reciprocating driven devices are subject to critical rotational speeds which may...

Misalignment Angular Degree Parallel Inch Dampening Capacity Temperature Range URETHANE – Urethane has greater torque capability than NBR (1.5 times), provides less dampening effect, and operates at a temperature range of -30° to 160° F (-34° to 71° C). Good resistance to oil and chemicals. Not recommended for cyclic or start/stop applications. VERY GOOD HYTREL® – Hytrel is a flexible elastomer designed for high torque and high temperature operations. Hytrel can operate in temperatures of -60° to 250° F (-51° to 121° C) and has an excellent resistance to oil and chemicals. Not recommended...

L Type Spiders / Hub Spline Bores L Type Coupling ■■Sizes range from L035 to L276 Item Selection SW Type Coupling ■■Sizes range from L090 to L190 ■■Ordering requires selecting UPC numbers for two standard L hubs and one snap wrap spider with snap ring ■■Ordering requires selecting UPC numbers for two standard L hubs and one standard open or solid center elastomer (spider) ■■Both L and SW Type couplings, select hubs from the standard bore and keyway chart (pages JW-11 and JW-12) maximum RPM for SW + Ring is 1,750 RPM Jaw In-Shear Coupling ■■Ordering requires selecting item numbers for two...

L Type Inch Bore / Keyway The L Type coupling consists of two standard L Type hubs and one spider. Refer to pages JW-11, JW-12, and JW-10. Notes: n Tolerances for bore and keyways are found in Engineering Data section (pages ED-10 and ED-11). All hubs supplied standard with one set screw. n Non-standard bores available – consult Lovejoy Engineering. n When referencing the Lovejoy UPC number in this table, include 685144 as a prefix to the number shown.

L Type Metric Bore / Keyway The L Type coupling consists of two standard L Type hubs and one spider. Refer to pages JW-10, JW-12, and JW-10. Item Selection L Type Hub - Metric Bore and Keyway UPC Number Selection Table No Keyway No Keyway No Keyway No Keyway No Keyway 3 x 1.4 No Keyway 3 x 1.4 4 x 1.8 No Keyway 4 x 1.8 No Keyway 5 x 2.3 No Keyway 5 x 2.3 5 x 2.3 5 x 2.3 6 x 2.8 No Keyway 6 x 2.8 6 x 2.8 6 x 2.8 8 x 3.3 8 x 3.3 No Keyway 8 x 3.3 8 x 3.3 No Keyway 10 x 3.3 No Keyway 10 x 3.3 10 x 3.3 12 x 3.3 12 x 3.3 14 x 3.8 No Keyway 14 x 3.8 No Keyway 14 x 3.8 No Keyway 16 x 4.3 No Keyway...