Lovejoy UF-75 Flange-to-Flange Uniflex Center Dropout.
UPC 68514413929.
Lovejoy UF-75 Uniflex center-dropout coupling connects two flanged shaft ends while allowing the center section to be removed without disturbing either flange — a maintenance-friendly design for driveline service and alignment work.
The UF-75 is built for setups where technicians need to pull a driveshaft or perform maintenance without unbolting both connected shafts. Its flange-to-flange design with a removable center section speeds up service on pumps, blowers, and other flanged industrial drives where downtime matters.
Dimensional Data
Coupling | UF75 |
Set Screw Thread Size (Dimension T) | No Setscrew |
Length (Dimension S) | 1.81 in |
Min. Bore (Dimension ID) | 0.375 in 9.53 mm |
Max. Bore (Dimensions ID) | 1.25 in 31.75 mm |
Dimension BC | 2.000 in 50.80 mm |
Dimension D | 2.380 in 60.45 mm |
Dimension FD | 2.500 in 63.50 mm |
Dimension FL1 | 0.380 in 9.65 mm |
Dimension HD | 2.500 in 63.50 mm |
Dimension S | 1.810 in 45.97 mm |
Pin Location (Dimension SL) | 0.620 in |
Pin Size | 1/8 in |
Mounting Screw Thread Size | 1/4-20 |
Cubic inches | 26.68750 in³ |
Performance Data
Max. Torque | 175.00 in·lb |
Max. Speed | 20000.00 rpm |
Max. Recommended End Play | 0.040 in 1.02 mm |
Max. Parallel Offset | 0.028 in 0.71 mm |
Max. Angular Offset | 4.50 º |
Wind-Up Angle at Max. Torque | 1.82 º |
Rated HP at 100 rpm | 0.28 hp |
Coupling Design
Coupling Design | Flexible Spring Type Coupling with Exclusive Triple Wound Spring Design
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Notes
Notes |
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Flexible couplings are used to link two rotating shafts that are not aligned in order to transmit the rotational power, known as torque, from one shaft to the other. Most flexible couplings consist of two hubs and a middle assembly; each hub attaches to a shaft while the middle assembly flexes between the hubs to accommodate the misalignment of the two shafts. Shaft misalignments are generally either parallel or angular and cause complications to transmitting rotational power from one shaft to another in the form of stresses, loads, vibrations, and other forces, which vary from one type of misalignment to another.
Flexible couplings are used in a broad range of applications, such as in motor vehicles, conveyors, escalators, agricultural, forestry and mining equipment, aeronautics, robotics and space exploration, among others.
Lovejoy manufactures flexible couplings, universal joints, variable speed drives, and other transmission and mechanical power products. The company, founded in 1900, is headquartered in Downers Grove, IL.
Lovejoy UF-75 Flange-to-Flange Uniflex Center Dropout.
Who This Fits
Maintenance teams on industrial equipment with flanged shaft connections who need faster teardown for inspection, lubrication, or driveshaft swaps. A good fit anywhere a standard rigid flange coupling makes routine service too slow.
What to Check Before Buying
Verify both mating flange bolt patterns and bore sizes match your existing equipment before ordering — flange couplings are not universal fits. Also confirm UPC 68514413929 matches the packaging you receive, since this is the manufacturer identifier already listed on the product page.
Lovejoy, a Timken company, has manufactured couplings and universal joints for industrial power transmission since 1907, and its components are used worldwide across agricultural, industrial, and heavy-duty driveline applications.
See more options in our Industrial Power Transmission Couplings guide.
