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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
| Description | U50R CPLG 3/8X1/2 N/KW BE |
|---|---|
| Hub Style | Regular |
| Type | Shaft-to-Shaft |
| Material | Steel |
| Weight | 0.36 lb |
| Color | Gray/Metallic |
| Bore Type | Finished Bore |
Dimensional Data
| Bore Size | 3/8 x 1/2 in |
|---|---|
| Hub Size | U50R |
| Set Screw Thread Size (Dimension T) | 1/4-20 |
| Keyway Size (W x D) | No Keyway |
| Dimension HD | 1.040 in26.42 mm |
| Overall Length | 2.500 in63.50 mm |
| Pin Location (Dimension SL) | 0.310 in |
| Length thru Bore | 0.640 in16.26 mm |
| Min. Bore (Dimensions ID1/ID2) | 0.313 in8.00 mm |
| Max. Bore (Dimensions ID1/ID2) | 0.500 in12.70 mm |
| Cubic inches | 2.70400 in³ |
Performance Data
| Operating Temperature Range | -40 to 250 ºF |
|---|---|
| Max. Torque | 82 in·lb |
| Max. Speed | 30000.00 rpm |
| Axial Misalignment (∆ Ka) | 0.035 in0.89 mm |
| Max. Parallel Misalignment | 0.021 in0.53 mm |
| Wind-Up Angle at Nominal Torque | 1.82 º |
| Wind-Up Angle at Max. Torque | 4.5 º |
| Rated HP at 100 rpm | 0.13 hp |
| # of Set Screws Required per Hub | 1 |
Coupling 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
Total backlash is approximately 1/3 of windup at maximum torque – consult Lovejoy Engineering for more information.
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+ 1/8 inch. |
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