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All Product Types > INDUSTRIAL MOTION PRODUCTS > Couplings & Power Transmission Parts Catalog > Curved Jaw Couplings > CJ Series (Standard Curved Jaw) Components > CJ Series Hubs - Powder Metal, A Style, Metric Bores > Part Number 68514472004  
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Part Number 68514472004, Curved Jaw Coupling Hub w/ 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.



Unit of Measure: Imperial Metric Both

Notes  · Specifications  · Dimensional Data  · Performance Data  · The Curved Jaw Design

Notes

Disclaimer
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.

Notes 
  • 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.


Specifications

Description 
CJ38A-HUB-PM-30MMH7-8X3.3MMKW

Hub Style
A

Type
Curved Jaw Coupling Hubs

Hub Material
Powder Metal

Style
Bored

Color
Metallic

Coupling Type
Jaw

Weight
2.66 lb


Dimensional Data

Bore Size
30.00 mm

Coupling Size
38

Set Screw Style Coupling Size (Dimension T)
5/16-18

Set Screw Style Coupling Location Size (Dimension SL)
0.590 in
14.99 mm

Keyway Size
8 X 3.3 mm

Length thru Bore (Dimensions LTB1/LTB2)
1.770 in
44.96 mm

Outside Diameter
3.150 in
80.00 mm

Overall Coupling Length
4.490 in
114.05 mm

Spider Outside Diameter
3.150 in
80.00 mm

Spider Inside Diameter
1.500 in
38.00 mm

Spider Thickness (Dimension W)
0.710 in
18.00 mm

Min. Bore (Dimensions ID1/ID2)
0.470 in
12.00 mm

Max. Bore (Dimensions ID1/ID2)
1.5 in
38 mm

Dimension G
0.940 in
23.88 mm

Dimension HD
2.600 in
66.04 mm

Dimension U
1.460 in
37.08 mm

Distance between Spider and Hub Face (Dimension CL)
0.120 in
3.05 mm

Cubic inches
11.96520 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)
1680 in·lb
190 N·m

Max Torque (with 92 Shore A spider)
3360 in·lb
380.00 N·m

Max. Speed
7100 rpm

Angular Displacement
0.070 in

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

Max. Axial Displacement (∆ Ka)
0.0700 in

Max. Radial Displacement (∆ Kr)
0.0110 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


 MORE IMAGES 

·  CJ Series Installation & Misalignment Capabilities

·  CJ Series Displacement



 DOWNLOADS 

Curved Jaw Catalog
(PDF, 0KB)

Standard Curved Jaw Installation Instructions
(PDF, 0KB)

Standard Curved Jaw Installation Video


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