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  • U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial
  • U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial-2
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.
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Bore Size    (in)

Keyway Size

Part Number

Description 

Bore Size   

Keyway Size

Dimension HD

Overall Length

Max. Torque

N/A U18-CP-1/4X1/4-NKW BE N/A 1/4 x 1/4 in N/A No Keyway N/A 0.610 in15.50 mm N/A 1 in25.4 mm N/A 18.00 in·lb
N/A U25R-CP-5/16X5/16-NKW BE N/A 5/16 x 5/16 in N/A No Keyway N/A 0.730 in18.54 mm N/A 1.500 in38.10 mm N/A 34.00 in·lb
N/A U25R-CP-1/4X1/4-NKW BE N/A 1/4 x 1/4 in N/A No Keyway N/A 0.730 in18.54 mm N/A 1.500 in38.10 mm N/A 34.00 in·lb
N/A U37R-CP-1/4X1/4-NKW BE N/A 1/4 x 1/4 in N/A No Keyway N/A 0.860 in21.84 mm N/A 2.060 in52.32 mm N/A 39.00 in·lb
N/A U37R-CP-3/8X3/8-NKW BE N/A 3/8 x 3/8 in N/A No Keyway N/A 0.860 in21.84 mm N/A 2.060 in52.32 mm N/A 39.00 in·lb
N/A U37R-CP-1/4X3/8-NKW BE N/A 1/4 x 3/8 in N/A No Keyway N/A 0.860 in21.84 mm N/A 2.060 in52.32 mm N/A 39.00 in·lb
N/A U50R-CP-1/2X1/2-NKW BE N/A 1/2 x 1/2 in N/A No Keyway N/A 1.040 in26.42 mm N/A 2.500 in63.50 mm N/A 82 in·lb
N/A U50R-CP-3/8X3/8-NKW BE N/A 3/8 x 3/8 in N/A No Keyway N/A 1.040 in26.42 mm N/A 2.500 in63.50 mm N/A 82 in·lb
N/A U50R-CP-3/8X1/2-NKW BE N/A 3/8 x 1/2 in N/A No Keyway N/A 1.040 in26.42 mm N/A 2.500 in63.50 mm N/A 82 in·lb
N/A U50R-CP-5/16X5/16-NKW BE N/A 5/16 x 5/16 in N/A No Keyway N/A 1.040 in26.42 mm N/A 2.500 in63.50 mm N/A 82 in·lb
N/A U62R-CP-5/16X5/16-NKW BE N/A 5/16 x 5/16 in N/A No Keyway N/A 1.420 in36.07 mm N/A 2.720 in69.09 mm N/A 126.00 in·lb
N/A U62R-CP-3/8X3/8-NKW BE N/A 3/8 x 3/8 in N/A No Keyway N/A 1.420 in36.07 mm N/A 2.720 in69.09 mm N/A 126.00 in·lb
N/A U75R-CP-3/8X3/8-NKW BE N/A 3/8 x 3/8 in N/A No Keyway N/A 1.420 in36.07 mm N/A 3.310 in84.07 mm N/A 175 in·lb
N/A U150R-CP-1/2X1/2-NKW BE N/A 1/2 x 1/2 in N/A No Keyway N/A 2.980 in75.69 mm N/A 6.280 in159.51 mm N/A 1890 in·lb
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