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All Product Types > INDUSTRIAL MOTION PRODUCTS > Couplings & Power Transmission Parts Catalog > Specialty Products - Deltaflex, Uniflex, Saga, Rigid Sleeve, Shaft Collars > Uniflex Couplings > RRU Type Hubs without Keyway - Inch (Imperial) Bores > Part Number 68514446489  
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Part Number 68514446489, RRU Type Hubs without Keyway - Inch (Imperial) Bores


RRU Type - Drop-Out Style
    The RRU Type Uniflex coupling is designed for fast, easy installation and removal without disrupting the connected shafts. This is ideal when servicing impellers, bearings and seals. The design consists of two steel hubs fastened with cap screws to a Uniflex double flange coupling (UF Type). The RRU is easily disassembled by simply removing the cap screws and sliding out the UF center spring section.
    This design offers “quick disconnect” for drop out requirements. It can also accommodate a slightly larger shaft diameter than the standard U Type.
    Note: A complete RRU Type coupling is comprised of 2 hubs, 2 hardware kits, and a UF Type center drop out section.



Unit of Measure: Imperial Metric Both

Specifications  · Dimensional Data  · Performance Data  · Coupling Design  · Notes

Specifications

Description 
RRU125-HUB-1/2-NKW

Hub Style
RRU Hub

Coupling Type
Drop-Out

Material
Steel

Color
Gray/Metallic

Bore Type
Finished Bore

Weight
3.50 lb


Dimensional Data

Bore Size 
1/2 in

Coupling
RRU125

Set Screw Thread Size (Dimension T)
3/8-16

Keyway Size (W x D)
No Keyway

Overall Length
5.840 in
148.34 mm

Min. Bore (Dimensions ID1/ID2)
0.625 in
15.88 mm

Max. Bore (Dimensions ID1/ID2)
1.625 in
41.28 mm

Dimension BC
3.120 in
79.25 mm

Dimension D
3.560 in
90.42 mm

Dimension FD
3.680 in
93.47 mm

Dimension FL
0.500 in
12.70 mm

Dimension FL1
0.500 in
12.70 mm

Dimension HD
2.750 in
69.85 mm

Dimension HL
1.620 in
41.15 mm

Dimension S
2.620 in
66.55 mm

Pin Location (Dimension SL)
0.560 in

Pin Size
5/16 in

Cubic inches
21.93869 in³


Performance Data

Max. Torque
755.00 in·lb

Max. Speed
6000 rpm

Max. Recommended End Play
0.040 in
1.02 mm

Max. Parallel Offset
0.044 in
1.12 mm

Max. Angular Offset
4.50 º

Wind-Up Angle at Max. Torque
1.85 º

Rated HP at 100 rpm
1.21 hp

# of Set Screws Required per Hub
1

Max. Torque
755 in·lb


Coupling Design
Flexible Spring Type Coupling with Exclusive Triple Wound Spring 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

Notes 
  • OAL Tolerance + .19 inch.
  • Total backlash is approximately 1/3 of windup at maximum torque – consult Lovejoy Engineering for more information.


 DOWNLOADS 

Specialty Products Catalog
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Uniflex Installation Instructions
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