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The Timken ® Syber ® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

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A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

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  • RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
  • RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial-2
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.
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Bore Size  (in)

Keyway Size

Part Number

Description 

Bore Size 

Keyway Size

Overall Length

Max. Torque

N/A RRU50-HUB-7/16-NKW N/A 7/16 in N/A No Keyway N/A 3.520 in89.41 mm N/A 82 in·lb
N/A RRU50-HUB-3/8-NKW N/A 3/8 in N/A No Keyway N/A 3.520 in89.41 mm N/A 82 in·lb
N/A RRU75-HUB-3/8-NKW N/A 3/8 in N/A No Keyway N/A 4.270 in108.46 mm N/A 175 in·lb
N/A RRU87-HUB-1/2-NKW N/A 1/2 in N/A No Keyway N/A 4.840 in122.94 mm N/A 346 in·lb
N/A RRU125-HUB-1/2-NKW N/A 1/2 in N/A No Keyway N/A 5.840 in148.34 mm N/A 755 in·lb
N/A RRU137-HUB-5/8-NKW N/A 5/8 in N/A No Keyway N/A 6.530 in165.86 mm N/A 1260 in·lb
N/A RRU150-HUB-7/8-NKW N/A 7/8 in N/A No Keyway N/A 7.660 in194.56 mm N/A 1890 in·lb
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