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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Item #

Description 

Bore Size   

Keyway Size

Dimension HD

Overall Length

Max. Torque

N/A U18 CPLG 1/4X1/4 N/KW W/SS 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 CPLG 5/16X5/16 N/KW W/SS 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 CPLG 1/4X1/4 N/KW 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 CPLG 1/4X1/4 N/KW W/SS 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 CPLG 3/8X3/8 N/KW W/SS 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 CPLG 1/4X3/8 N/KW 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 CPLG 1/2X1/2 N/KW W/SS 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 CPLG 3/8X3/8 N/KW W/SS 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 CPLG 3/8X1/2 N/KW 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 CPLG 5/16X5/16 N/KW 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 CPLG 5/16X5/16 N/KW 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 CPLG 3/8X3/8 N/KW 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 CPLG 3/8X3/8 N/KW W/SS 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 CPLG 1/2X1/2 N/KW 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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