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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

Specifications

Description 

 N/A RRU125-HUB-1/2-NKW

Hub Style

 N/A RRU Hub

Coupling Type

 N/A Drop-Out

Material

 N/A Steel

Color

 N/A Gray/Metallic

Bore Type

 N/A Finished Bore

Weight

 N/A 3.50 lb

Dimensional Data

Bore Size 

 N/A 1/2 in

Coupling

 N/A RRU125

Set Screw Thread Size (Dimension T)

 N/A 3/8-16

Keyway Size (W x D)

 N/A No Keyway

Overall Length

 N/A 5.840 in148.34 mm

Min. Bore (Dimensions ID1/ID2)

 N/A 0.625 in15.88 mm

Max. Bore (Dimensions ID1/ID2)

 N/A 1.625 in41.28 mm

Dimension BC

 N/A 3.120 in79.25 mm

Dimension D

 N/A 3.560 in90.42 mm

Dimension FD

 N/A 3.680 in93.47 mm

Dimension FL

 N/A 0.500 in12.70 mm

Dimension FL1

 N/A 0.500 in12.70 mm

Dimension HD

 N/A 2.750 in69.85 mm

Dimension HL

 N/A 1.620 in41.15 mm

Dimension S

 N/A 2.620 in66.55 mm

Pin Location (Dimension SL)

 N/A 0.560 in

Pin Size

 N/A 5/16 in

Cubic inches

 N/A 21.93869 in³

Performance Data

Max. Torque

 N/A 755.00 in·lb

Max. Speed

 N/A 6000 rpm

Max. Recommended End Play

 N/A 0.040 in1.02 mm

Max. Parallel Offset

 N/A 0.044 in1.12 mm

Max. Angular Offset

 N/A 4.50 º

Wind-Up Angle at Max. Torque

 N/A 1.85 º

Rated HP at 100 rpm

 N/A 1.21 hp

# of Set Screws Required per Hub

 N/A 1

Max. Torque

 N/A 755 in·lb

Coupling Design

Coupling Design

 N/A 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 

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