Lovejoy UFH-125R Flange-to-Shaft Uniflex Coupling , 3/4" Bore with 3/16" x 3/32" Keyway, 3.68" Flange Diameter, 3.75" Overall Length, 6000 RPM Maximum, 755 in-lbs Max Torque

                This Lovejoy UFH Type Uniflex coupling is an all-steel, single-piece coupling that connects flange mounted equipment to a shaft. The flexing center of the coupling consists of three opposingly wound square wire springs for forward or reverse operation, providing low backlash/windup. Its compact, single-piece design allows for placement in tight places, and its all-metal design is durable and requires no lubrication. This coupling is resistant to oil, grease, dirt, and most industrial chemicals and can withstand temperatures ranging from -40 to 450 degrees F. A keyway prevents the shaft from rotating in the hub. This coupling is suitable for applications such as printing and binding registration, robotics/positioning, conveyors, machine tools, centrifugal pumps, agricultural machinery, blowers, winding machines, and steering mechanisms.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.