All Product Types > INDUSTRIAL MOTION PRODUCTS > Couplings & Power Transmission Parts Catalog > Specialty Products - Uniflex, Saga, Rigid Sleeve, Shaft Collars > Uniflex Couplings > U Type with Keyway, Regular Version - Inch (Imperial) Bores > Part Number 68514413409  

Part Number 68514413409, U Type with Keyway, Regular Version - Inch (Imperial) Bores

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U Type Shaft-to-Shaft
    The U Type is the basis for all Uniflex couplings. It is a shaft-to-shaft flexible coupling with a simple one piece design, making it ideal for indexing, robotic or positioning applications. The U Type consists of a triple-wound flexible steel spring brazed to a steel hub at each end. This all steel design ensures optimum equipment protection in severe environments and/or high temperature applications. Regular and short versions are available for most sizes to accommodate different overall length requirements. Special hub or bore modifications are also possible. These units can be supplied with either pin holes or with keyways and set screws. Lovejoy does not recommend the reboring of uniflex couplings by customers due to potential damage to the brazed joint.
    This is a durable one-piece flexible coupling for general purpose shaft-to- shaft applications. It is the basis for all Uniflex coupling types.





Specifications  · Dimensional Data  · Performance Data  · Coupling Design  · Notes

Specifications

Description 
U87R-CP-7/8X7/8

Hub Style
Regular

Type
Shaft-to-Shaft

Material
Steel

Weight
1.32 lb

Color
Gray/Metallic

Bore Type
Finished Bore


Dimensional Data

Bore Size   
7/8 x 7/8 in

Hub Size
U87R

Set Screw Thread Size (Dimension T)
1/4-20

Keyway Size (W x D)
3/16 x 3/32 in

Dimension HD
1.730 in
43.94 mm

Overall Length
3.50 in
88.90 mm

Pin Location (Dimension SL)
0.44 in

Length thru Bore
0.840 in
21.34 mm

Min. Bore (Dimensions ID1/ID2)
0.438 in
11.13 mm

Max. Bore (Dimensions ID1/ID2)
0.875 in
22.23 mm

Cubic inches
10.47515 in³


Performance Data

Operating Temperature Range
-40 to 250 ºF

Max. Torque
346 in·lb

Max. Speed
10000 rpm

Axial Misalignment (∆ Ka)
0.040 in
1.02 mm

Max. Parallel Misalignment
0.035 in
0.89 mm

Wind-Up Angle at Nominal Torque
1.68 º

Wind-Up Angle at Max. Torque
4.5 º

Rated HP at 100 rpm
0.55 hp

# of Set Screws Required per Hub
1


Coupling Design
Flexible Spring Type Coupling with Exclusive Triple Wound Spring Design
    The Uniflex Coupling is an all steel, single piece coupling that solves a variety of application concerns including: high misalignment, space limitations, high temperature, and exceptionally low backlash/windup. The unique flexing center of the Uniflex consists of three opposingly wound square wire springs for forward or reverse operation. Two steel hubs are then brazed to the steel spring pack to create a durable one-piece flexible coupling.




Notes

Notes 
  • Total backlash is approximately 1/3 of windup at maximum torque – consult Lovejoy Engineering for more information.
  • OAL Tolerance: + 1/8 inch.


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