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CJ 28/38B HUB PM 1-1/4 1/4KW

BRAND: LoveJoy | MODEL: 68514462018 | CONDITION: NEW | SKU: 1796806
CJ 28/38B HUB PM 1-1/4 1/4KW

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Actual product may vary
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Weight: 1.59 lbs UOM: EA

Additional Description

Technical Specifications

OD 2.560 in



  • 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.
Description  CJ 28/38B HUB PM 1-1/4 1/4KW
Hub Style B
Type Curved Jaw Coupling Hubs
Hub Material Powder Metal
Style Bored
Color Metallic
Coupling Type Jaw
Weight 1.59 lb
Dimensional Data
Bore Size  1 1/4 in
Coupling Size 28
Set Screw Style Coupling Size (Dimension T) 5/16-18
Set Screw Style Coupling Location Size (Dimension SL) 0.590 in14.99 mm
Keyway Size (W x D) 1/4 x 1/8 in
Length thru Bore (Dimensions LTB1/LTB2) 1.380 in35.05 mm
Outside Diameter 2.560 in65.02 mm
Overall Coupling Length 3.540 in89.92 mm
Spider Outside Diameter 2.560 in65.00 mm
Spider Thickness (Dimension W) 0.590 in15.00 mm
Min. Bore (Dimensions ID1/ID2) 0.870 in22.00 mm
Max. Bore (Dimensions ID1/ID2) 1.5 in38 mm
Dimension G 0.790 in20.07 mm
Dimension HD 2.560 in65.02 mm
Distance between Spider and Hub Face (Dimension CL) 0.100 in2.54 mm
Cubic inches 9.04397 in³
Performance Data
Normal Temperature Range (with 80 Shore A, 92 Shore A, and 95/98 Shore A spiders) -40 to 212 ºF
Max. Temperature Range (with 80 Shore A, 92 Shore A, and 95/98 Shore A spiders) -50 to 248 ºF
Nominal Torque (with 92 Shore A spider) 840.00 in·lb
Max Torque (with 92 Shore A spider) 1680.00 in·lb
Max. Speed 8500.00 rpm
Angular Displacement 0.050 in
Max. Angular Displacement (∆ Ka), n=1500 [1/min] 0.90 º
Max. Axial Displacement (∆ Ka) 0.0600 in
Max. Radial Displacement (∆ Kr) 0.0100 in
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
  • 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 for assembly instructions of the curved jaw coupling.