Jaw Type Couplings, LovejoyThe 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.

Jaw Type Couplings, LovejoyApplications include power transmission to industrial equipment such as pumps, gear boxes, compressors, blowers, mixers, and conveyors. Lovejoy’s Jaw Type couplings are available in 24 sizes from a minimum torque rating of 3.5 in–lbs (0.4 Nm) to a maximum torque rating of 170,004 in–lbs (19209 Nm) and a bore range of .125 inches (4.45mm) to 7 inches (178mm). Lovejoy’s standard bore program covers AGMA, SAE, and DIN bore/keyway and spline bore combinations.

Lovejoy Jaw Type couplings generally consist of two hubs (available in sintered metal, aluminum, bronze, steel, stainless steel, and ductile iron), and an elastomer element, known as a spider or cushion (materials available include NBR SOX rubber, Urethane, Hytrel®, and Bronze).

  • Fail-safe - will still perform if elastomer fails

  • No metal to metal contact

  • Resistant to oil, dirt, sand, moisture and grease

  • More than 850,000 combinations of bore sizes

  • Most types available from stock in 24 hours

Jaw Type Coupling
Stainless Steel Jaw
L-LOC Clamp Feature Sheet

Jaw Type Couplings, Lovejoy

L Type – Standard Jaw Coupling

  • Industry’s standard shaft coupling

  • Fail-safe (will still perform if elastomeric “spider” fails)

  • Max Bore: 2.875 inches (73 mm)

  • Max Torque: 12,500 in-lbs (1412 Nm)

Jaw Type Couplings, Lovejoy

AL Type – Aluminum Jaw Coupling

  • Lightweight aluminum version of the standard shaft coupling

  • Corrosion resistant (finished bores passivated for added protection)

  • Max Bore: 1.875 inches (48 mm)

  • Max Torque: 2,268 in-lbs (256 Nm)

Jaw Type Couplings, Lovejoy

SS Type – Stainless Steel Jaw Coupling

  • Stainless steel version of the industry standard shaft coupling

  • Interchangeable with L and AL line of hubs (except AL150)

  • Max Bore: 1.875 inches (48 mm)

  • Max Torque: 3,708 in-lbs inches (419 Nm)

Jaw Type Couplings, Lovejoy

SW Type - Radially Removable Elastomer

  • Standard L type coupling with radially removable elastomer

  • Fail-safe; plus open center allows for minimal shaft separation

  • 1,750 RPM limit (see LC type for higher limit)

  • Max Bore: 2.125 inches (55 mm)

Jaw Type Couplings, Lovejoy

LC Type – Radially Removable Elastomer

  • Standard L type coupling with radially removable elastomer

  • Higher RPM limit (compared to SW) of 3,600 RPM

  • Fail-safe; plus open center allows for minimal shaft separation

  • Max Bore: 2.625 inches (65 mm)

Jaw Type Couplings, Lovejoy

RRS/RRSC Type – Radially Removable Spacer Coupling

  • Spacer coupling with “drop out” center for proper separation

  • Radially removable elastomers (easy installation & maintenance)

  • US and European industry standard pump/motor shaft separations

  • Spacer made of glass reinforced plastic, cast iron, or aluminum

Jaw Type Couplings, Lovejoy

RRC Type – Radially Removable Spacer Coupling

  • Larger version of RRS/RRSC type couplings

  • Spacer coupling with “drop out” center for proper separation

  • Radially removable elastomers (easy installation & maintenance)

  • Spacer made of glass reinforced plastic, cast iron, or aluminum

Jaw Type Couplings, Lovejoy

C Type – Higher Torque Jaw Coupling

  • Greater torque and bore capacity (compared to L type)

  • Fail-safe; plus radially removable elastomeric cushions

  • Max Bore: 4.000 inches (102mm)

  • Max Torque: 37,800 in-lbs (4271 Nm)

Jaw Type Couplings, Lovejoy

H Type – Highest Torque Jaw Coupling

  • Highest torque and bore capacity jaw coupling (more than L & C types)

  • Fail-safe; plus radially removable elastomeric cushions

  • Max Bore: 7.000 inches (178 mm)

  • Max Torque: 170,000in-lbs (19209 Nm)