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CJ Series Hubs - Steel, B Style, Metric Bores
Couplings & Power Transmission Parts Catalog
Curved Jaw Couplings
CJ Series (Standard Curved Jaw) Components
Item # 68514476181
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Item # 68514476181, Curved Jaw Coupling Hub w/o Keyway
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.
The Curved Jaw Design
CJ 28/38B HUB STL 24MM N/KW
Curved Jaw Coupling Hubs
Set Screw Style Coupling Size (Dimension T)
Set Screw Style Coupling Location Size (Dimension SL)
Length thru Bore (Dimensions LTB1/LTB2)
Overall Coupling Length
Spider Inside Diameter
Spider Outside Diameter
Spider Thickness (Dimension W)
Min. Bore (Dimensions ID1/ID2)
Max. Bore (Dimensions ID1/ID2)
Distance between Spider and Hub Face (Dimension CL)
Normal Temperature Range (with 80 Shore A, 92 Shore A, and 95/98 Shore A spiders)
-40 to 212
Max. Temperature Range (with 80 Shore A, 92 Shore A, and 95/98 Shore A spiders)
-50 to 248
Nominal Torque (with 92 Shore A spider)
Max Torque (with 92 Shore A spider)
Max. Angular Displacement (∆ Ka), n=1500 [1/min]
Max. Axial Displacement (∆ Ka)
Max. Radial Displacement (∆ Kr)
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 www.lovejoy-inc.com for assembly instructions of the curved jaw coupling.
CJ Series Installation & Misalignment Capabilities
CJ Series Displacement
Curved Jaw Catalog
Standard Curved Jaw Installation Instructions
Standard Curved Jaw Installation Video
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