The Timken Company - RRU Type Hubs with Keyway - Inch (Imperial) Bores

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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.

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Unit of Measure

Items	68514444209 RRU Type Hubs with Keyway - Inch (Imperial) Bores	68514444210 RRU Type Hubs with Keyway - Inch (Imperial) Bores	68514446480 RRU Type Hubs with Keyway - Inch (Imperial) Bores	68514413750 RRU Type Hubs with Keyway - Inch (Imperial) Bores
Description	N/A RRU50-HUB-5/8-3/16X3/32KW	N/A RRU50-HUB-7/8-3/16X3/32KW	N/A RRU75-HUB-3/4-3/16X3/32KW	N/A RRU75-HUB-1-1/4-1/4X1/8KW
Bore Size	N/A 5/8 in	N/A 7/8 in	N/A 3/4 in	N/A 1 1/4 in
Hub Style	N/A RRU Hub
Coupling Type	N/A Drop-Out
Coupling	N/A RRU50	N/A RRU50	N/A RRU75	N/A RRU75
Material	N/A Steel
Set Screw Thread Size (Dimension T)	N/A 1/4-20
Keyway Size (W x D)	N/A 3/16 x 3/32 in	N/A 3/16 x 3/32 in	N/A 3/16 x 3/32 in	N/A 1/4 x 1/8 in
Overall Length	N/A 3.520 in89.41 mm	N/A 3.520 in89.41 mm	N/A 4.270 in108.46 mm	N/A 4.270 in108.46 mm
Color	N/A Gray/Metallic
Max. Torque	N/A 82.00 in·lb	N/A 82.00 in·lb	N/A 175.00 in·lb	N/A 175.00 in·lb
Bore Type	N/A Finished Bore
Min. Bore (Dimensions ID1/ID2)	N/A 0.375 in9.53 mm
Max. Bore (Dimensions ID1/ID2)	N/A 1.000 in25.40 mm	N/A 1.000 in25.40 mm	N/A 1.25 in31.75 mm	N/A 1.25 in31.75 mm
Max. Speed	N/A 30000.00 rpm	N/A 30000.00 rpm	N/A 20000.00 rpm	N/A 20000.00 rpm
Dimension BC	N/A 1.500 in38.10 mm	N/A 1.500 in38.10 mm	N/A 2.000 in50.80 mm	N/A 2.000 in50.80 mm
Dimension D	N/A 1.880 in47.75 mm	N/A 1.880 in47.75 mm	N/A 2.380 in60.45 mm	N/A 2.380 in60.45 mm
Dimension FD	N/A 2.000 in50.80 mm	N/A 2.000 in50.80 mm	N/A 2.500 in63.50 mm	N/A 2.500 in63.50 mm
Dimension FL1	N/A 0.250 in6.35 mm	N/A 0.250 in6.35 mm	N/A 0.380 in9.65 mm	N/A 0.380 in9.65 mm
Dimension HD	N/A 2.000 in50.80 mm	N/A 2.000 in50.80 mm	N/A 2.500 in63.50 mm	N/A 2.500 in63.50 mm
Dimension HL	N/A 1.000 in25.40 mm	N/A 1.000 in25.40 mm	N/A 1.250 in31.75 mm	N/A 1.250 in31.75 mm
Dimension S	N/A 1.560 in39.62 mm	N/A 1.560 in39.62 mm	N/A 1.810 in45.97 mm	N/A 1.810 in45.97 mm
Pin Location (Dimension SL)	N/A 0.500 in	N/A 0.500 in	N/A 0.620 in	N/A 0.620 in
Pin Size	N/A 1/8 in
Max. Recommended End Play	N/A 0.035 in0.89 mm	N/A 0.035 in0.89 mm	N/A 0.040 in1.02 mm	N/A 0.040 in1.02 mm
Max. Parallel Offset	N/A 0.021 in0.53 mm	N/A 0.021 in0.53 mm	N/A 0.028 in0.71 mm	N/A 0.028 in0.71 mm
Max. Angular Offset	N/A 4.50 º
Wind-Up Angle at Max. Torque	N/A 1.82 º
Rated HP at 100 rpm	N/A 0.13 hp	N/A 0.13 hp	N/A 0.28 hp	N/A 0.28 hp
# of Set Screws Required per Hub	N/A 1
Cubic inches	N/A 4.00000 in³	N/A 4.00000 in³	N/A 7.81250 in³	N/A 7.81250 in³
Normal Temperature Range	N/A -40 to 240 ºF
Max. Torque	N/A 82 in·lb	N/A 82 in·lb	N/A 175 in·lb	N/A 175 in·lb
Weight	N/A 0.60 lb	N/A 0.60 lb	N/A 0.90 lb	N/A 0.90 lb