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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  (in)

Part Number

Description 

Bore Size   

Keyway Size (W x D)

Dimension HD

Overall Length

Max. Torque

N/A U50S-CP-1/2X1/2 N/A 1/2 x 1/2 in N/A 1/8 x 1/16 in N/A 1.040 in26.42 mm N/A 1.820 in46.23 mm N/A 82 in·lb
N/A U37S-CP-1/4X3/8-NKW NSS PH RH N/A 1/4 x 3/8 in N/A 1/16 x 1/32 & Puller Hole in N/A 0.860 in21.84 mm N/A 2.060 in52.32 mm N/A 39.00 in·lb
N/A U62S-CP-1/2X1/2 N/A 1/2 x 1/2 in N/A 1/8 x 1/16 in N/A 1.420 in36.07 mm N/A 2.280 in57.91 mm N/A 126.00 in·lb
N/A U62S-CP-1/2X5/8 N/A 1/2 x 5/8 in N/A 1/8 x 1/16 & 3/16 x 3/32 in N/A 1.420 in36.07 mm N/A 2.280 in57.91 mm N/A 126.00 in·lb
N/A U62S-CP-5/8X5/8 N/A 5/8 x 5/8 in N/A 3/16 x 3/32 in N/A 1.420 in36.07 mm N/A 2.280 in57.91 mm N/A 126.00 in·lb
N/A U75S-CP-3/4X3/4 N/A 3/4 x 3/4 in N/A 3/16 x 3/32 in N/A 1.420 in36.07 mm N/A 2.720 in69.09 mm N/A 175 in·lb
N/A U75S-CP-5/8X5/8 N/A 5/8 x 5/8 in N/A 3/16 x 3/32 in N/A 1.420 in36.07 mm N/A 2.720 in69.09 mm N/A 175 in·lb
N/A U75S-CP-5/8X3/4 N/A 5/8 x 3/4 in N/A 3/16 x 3/32 in N/A 1.420 in36.07 mm N/A 2.720 in69.09 mm N/A 175 in·lb
N/A U87S-CP-7/8X7/8 N/A 7/8 x 7/8 in N/A 3/16 x 3/32 in N/A 1.730 in43.94 mm N/A 2.910 in73.91 mm N/A 346 in·lb
N/A U87S-CP-5/8X5/8 N/A 5/8 x 5/8 in N/A 3/16 x 3/32 in N/A 1.730 in43.94 mm N/A 2.910 in73.91 mm N/A 346 in·lb
N/A U87S-CP-3/4X3/4 N/A 3/4 x 3/4 in N/A 3/16 x 3/32 in N/A 1.730 in43.94 mm N/A 2.910 in73.91 mm N/A 346 in·lb
N/A U87S-CP-5/8X3/4 N/A 5/8 x 3/4 in N/A 3/16 x 3/32 in N/A 1.730 in43.94 mm N/A 2.910 in73.91 mm N/A 346 in·lb
N/A U87S-CP-5/8X7/8 N/A 5/8 x 7/8 in N/A 3/16 x 3/32 in N/A 1.730 in43.94 mm N/A 2.910 in73.91 mm N/A 346 in·lb
N/A U100S-CP-1"X1" N/A 1 x 1 in N/A 1/4 x 1/8 in N/A 2.11 in53.59 mm N/A 3.560 in90.42 mm N/A 565 in·lb
N/A U100S-CP-5/8X1" N/A 5/8 x 1 in N/A 3/16 x 3/32 & 1/4 x 1/8 in N/A 2.11 in53.59 mm N/A 3.560 in90.42 mm N/A 565 in·lb
N/A U125S-CP-1-1/4X1-1/4 N/A 1 1/4 x 1 1/4 in N/A 1/4 x 1/8 in N/A 2.170 in55.12 mm N/A 3.75 in95.25 mm N/A 755 in·lb
N/A U125S-CP-1"X1" N/A 1 x 1 in N/A 1/4 x 1/8 in N/A 2.170 in55.12 mm N/A 3.75 in95.25 mm N/A 755 in·lb
N/A U125S-CP-1"X1-1/4 N/A 1 x 1 1/4 in N/A 1/4 x 1/8 in N/A 2.170 in55.12 mm N/A 3.75 in95.25 mm N/A 755 in·lb
N/A U125S-CP-5/8X5/8 N/A 5/8 x 5/8 in N/A 3/16 x 3/32 in N/A 2.170 in55.12 mm N/A 3.75 in95.25 mm N/A 755 in·lb
N/A U137S-CP-7/8X7/8 N/A 7/8 x 7/8 in N/A 3/16 x 3/32 in N/A 2.54 in64.52 mm N/A 4.120 in104.65 mm N/A 1260 in·lb
N/A U137S-CP-1-3/8X1-3/8 N/A 1 3/8 x 1 3/8 in N/A 5/16 x 5/32 in N/A 2.54 in64.52 mm N/A 4.120 in104.65 mm N/A 1260 in·lb
N/A U137S-CP-7/8X1-3/8-KW LH N/A 7/8 x 1 3/8 in N/A 1/4 x 1/8 & 5/16 x 5/32 in N/A 2.54 in64.52 mm N/A 4.120 in104.65 mm N/A 1260 in·lb
N/A U150S-CP-1-1/2X1-1/2 N/A 1 1/2 x 1 1/2 in N/A 3/8 x 3/16 in N/A 2.980 in75.69 mm N/A 5.00 in127.00 mm N/A 1890 in·lb
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