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    A complete CJ Series coupling is comprised of two standard CJ hubs and one CJ spider. Four types of spiders are available for the CJ Series.
Unit of Measure



N/A Lovejoy: CAD Models are accurate envelope dimensions only. Features such as bore size and keyway are not rendered or are only representative. Contact Lovejoy Technical Support or refer to product catalogs for details.


  • Maximum bore may be achieved through the use of a shallow keyway.
  • Maximum bore refers to maximum straight bore with keyway allowed in hub.
  • Outside Diameter is equal to Dimension HD for B style aluminum sizes: 19, 24, and 28.
  • S = Solid hub with no bore
  • Spider Outside Diameter (Dimension A) is equal to Outside Diameter
  • The values regarding displacement are provided assuming normal operating conditions (i.e. temperature, torque with nominal rating of the coupling, speed/ RPM rating of the coupling, and misalignment).
    Careful installation (i.e. alignment) and periodic inspection should be provided to provide the optimum life of the coupling. Special consideration should be given as to the position of the shafts and the amount of axial movement the coupling will be exposed to.
    The more accurate the alignment of the coupling, will result in greater life of the elastomer. A coupling guard and rotating equipment safety procedures should always be followed.
    Please consult the Lovejoy web site at www.lovejoy-inc.com for assembly instructions of the curved jaw coupling.



N/A CJ 24A HUB PM 5/8 3/16X3/32K

Hub Style



N/A Curved Jaw Coupling Hubs

Hub Material

N/A Powder Metal


N/A Bored


N/A Metallic

Coupling Type

N/A Jaw


N/A 0.68 lb

Dimensional Data

Bore Size 

N/A 5/8 in

Coupling Size

N/A 24

Set Screw Style Coupling Size (Dimension T)

N/A 10-24

Set Screw Style Coupling Location Size (Dimension SL)

N/A 0.390 in9.91 mm

Keyway Size (W x D)

N/A 3/16 x 3/32 in

Length thru Bore (Dimensions LTB1/LTB2)

N/A 1.180 in29.97 mm

Outside Diameter

N/A 2.200 in55.88 mm

Overall Coupling Length

N/A 3.070 in77.98 mm

Spider Outside Diameter

N/A 2.160 in55.00 mm

Spider Thickness (Dimension W)

N/A 0.550 in14.00 mm

Min. Bore (Dimensions ID1/ID2)

N/A 0.470 in12.00 mm

Max. Bore (Dimensions ID1/ID2)

N/A 0.950 in24.00 mm

Dimension G

N/A 0.700 in17.78 mm

Dimension HD

N/A 1.57 in39.88 mm

Dimension U

N/A 0.940 in23.88 mm

Distance between Spider and Hub Face (Dimension CL)

N/A 0.080 in2.03 mm

Cubic inches

N/A 2.90858 in³

Performance Data

Normal Temperature Range (with 80 Shore A, 92 Shore A, and 95/98 Shore A spiders)

N/A -40 to 212 ºF

Max. Temperature Range (with 80 Shore A, 92 Shore A, and 95/98 Shore A spiders)

N/A -50 to 248 ºF

Nominal Torque (with 92 Shore A spider)

N/A 310.00 in·lb

Max Torque (with 92 Shore A spider)

N/A 620.00 in·lb

Max. Speed

N/A 10600.00 rpm

Angular Displacement

N/A 0.040 in

Max. Angular Displacement (∆ Ka), n=1500 [1/min]

N/A 0.90 º

Max. Axial Displacement (∆ Ka)

N/A 0.0550 in

Max. Radial Displacement (∆ Kr)

N/A 0.0090 in

The Curved Jaw Design

The Curved Jaw Design

  • Three piece design that is easy to assemble
  • The curved jaw design incorporates both radial and axial curvature (crowning) to the elastomer (spider)
  • Hubs are offered in sintered iron, steel, aluminum, cast iron and nodular iron materials
  • Three different urethane elastomers available
  • No metal to metal contact and no lubrication required
  • Fail safe design due to the jaw in compression design (continues to function after the elastomer fails)
  • The CJ series covers a torque range of 67 to 247,800 in-lbs
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