Lovejoy RRU-75 Drop-Out Style Uniflex Coupling Hub 1-1/4 In Bore w Kw
Lovejoy 68514413750 RRU-75 Drop-Out Style Uniflex Coupling Hub , 1-1/4″ Bore, 2.50″ OD, 4.27″ Overall Coupling Length, 1/4″ x 1/8″ Keyway
Dimensional Data
Bore Size | 1 1/4 in |
Coupling | RRU75 |
Set Screw Thread Size (Dimension T) | 1/4-20 |
Keyway Size (W x D) | 1/4 x 1/8 in |
Overall Length | 4.270 in 108.46 mm |
Min. Bore (Dimensions ID1/ID2) | 0.375 in 9.53 mm |
Max. Bore (Dimensions ID1/ID2) | 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 HL | 1.250 in 31.75 mm |
Dimension S | 1.810 in 45.97 mm |
Pin Location (Dimension SL) | 0.620 in |
Pin Size | 1/8 in |
Cubic inches | 7.81250 in³ |
Performance Data
Max. Torque | 175.00 in·lb |
Max. Speed | 20000.00 rpm |
Max. Recommended End Play | 0.040 in1.02 mm |
Max. Parallel Offset | 0.028 in0.71 mm |
Max. Angular Offset | 4.50 º |
Wind-Up Angle at Max. Torque | 1.82 º |
Rated HP at 100 rpm | 0.28 hp |
# of Set Screws Required per Hub | 1 |
Normal Temperature Range | -40 to 240 ºF |
Max. Torque | 175 in·lb |
Coupling Design
Coupling Design | Flexible Spring Type Coupling with Exclusive Triple Wound Spring Design
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Lovejoy RRU-75 Drop-Out Style Uniflex Coupling Hub 1-1/4 In Bore w Kw
This Lovejoy RRU steel coupling hub can be fastened with cap screws to both ends of a Uniflex double flange coupling for connecting rotating shafts and providing low backlash/windup.
The hub has a quick disconnect design to meet drop out requirements. This hub is made of steel for strength and durability, has a finished bore that fits onto shaft without the need for machining, and requires no lubrication.
It is resistant to oil, grease, dirt, and most industrial chemicals and can withstand temperatures up to 250 degrees F.
A keyway prevents the shaft from rotating in the hub. This hub can be used with couplings 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.
