The Timken Company - U Type with Keyway, Short Version - Metric 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.

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Items	68514476417 U Type with Keyway, Short Version - Metric Bores	68514476584 U Type with Keyway, Short Version - Metric Bores	68514476225 U Type with Keyway, Short Version - Metric Bores	68514476537 U Type with Keyway, Short Version - Metric Bores	68514476494 U Type with Keyway, Short Version - Metric Bores
Description	N/A U62S-CP-3/8X12MMH7	N/A U75S-CP-3/4X13MMH7	N/A U75S-CP-11MMH7X5/8	N/A U75S-CP-16MMH7X16MMH7-NKW RH	N/A U125S-CP-25MMH7X25MMH7-KW BE
Bore Size	N/A 3/8 in x 12 mm mm	N/A 3/4 in x 13 mm mm	N/A 11 mm x 5/8 in mm	N/A 16 x 16 mm	N/A 25 x 25 mm
Hub Style	N/A Short
Type	N/A Shaft-to-Shaft
Hub Size	N/A U62S	N/A U75S	N/A U75S	N/A U75S	N/A U125S
Material	N/A Steel
Set Screw Thread Size (Dimension T)	N/A 1/4-20 & M6 x 8	N/A 1/4-20 & M6 x 6	N/A M6 x 6 & 1/4-20	N/A M6 x 6	N/A 3/8-16
Keyway Size	N/A 3/32 x 3/64 in & 4 x 1.8 mm	N/A 3/16 x 3/32 in & 5 x 2.3 mm	N/A 4 x 1.8 mm & 3/16 x 3/32 in	N/A No Keyway & 5 x 2.3 mm	N/A 5/16 x 5/32 in
Weight	N/A 0.61 lb	N/A 0.71 lb	N/A 0.71 lb	N/A 0.71 lb	N/A 2.75 lb
Dimension HD	N/A 1.420 in36.07 mm	N/A 1.420 in36.07 mm	N/A 1.420 in36.07 mm	N/A 1.420 in36.07 mm	N/A 2.170 in55.12 mm
Overall Length	N/A 2.280 in57.91 mm	N/A 2.720 in69.09 mm	N/A 2.720 in69.09 mm	N/A 2.720 in69.09 mm	N/A 3.75 in95.25 mm
Pin Location (Dimension SL)	N/A 0.38 in	N/A 0.41 in	N/A 0.44 in	N/A 0.44 in	N/A 0.62 in
Color	N/A Gray/Metallic
Operating Temperature Range	N/A -40 to 250 ºF
Max. Torque	N/A 126.00 in·lb	N/A 175 in·lb	N/A 175 in·lb	N/A 175 in·lb	N/A 755 in·lb
Length thru Bore	N/A 0.840 in21.34 mm	N/A 0.840 in21.34 mm	N/A 0.840 in21.34 mm	N/A 0.840 in21.34 mm	N/A 1.100 in27.94 mm
Bore Type	N/A Finished Bore
Min. Bore (Dimensions ID1/ID2)	N/A 0.313 in7.95 mm	N/A 0.375 in9.53 mm	N/A 0.394 in10.00 mm	N/A 0.394 in10.00 mm	N/A 0.625 in16.00 mm
Max. Bore (Dimensions ID1/ID2)	N/A 0.625 in15.88 mm	N/A	N/A 0.748 in19.00 mm	N/A 0.748 in19.00 mm	N/A 1.260 in32.00 mm
Max. Speed	N/A 20000.00 rpm	N/A 20000.00 rpm	N/A 20000.00 rpm	N/A 20000.00 rpm	N/A 6000 rpm
Axial Misalignment (∆ Ka)	N/A 0.020 in0.51 mm
Max. Parallel Misalignment	N/A 0.019 in0.48 mm	N/A 0.019 in0.48 mm	N/A 0.019 in0.48 mm	N/A 0.019 in0.48 mm	N/A 0.030 in0.76 mm
Wind-Up Angle at Nominal Torque	N/A 0.85 º	N/A 1.12 º	N/A 1.12 º	N/A 1.12 º	N/A 1.22 º
Wind-Up Angle at Max. Torque	N/A 3.00 º
Rated HP at 100 rpm	N/A 0.20 hp	N/A 0.28 hp	N/A 0.28 hp	N/A 0.28 hp	N/A 1.21 hp
# of Set Screws Required per Hub	N/A 1
Cubic inches	N/A 4.59739 in³	N/A 5.48461 in³	N/A 5.48461 in³	N/A 5.48461 in³	N/A 17.65838 in³