The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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.
RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial-2
Unit of Measure
Items RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
68514452740
RRU Type Hardware 		RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
68514452741
RRU Type Hardware 		RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
68514452742
RRU Type Hardware 		RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
68514452743
RRU Type Hardware 		RRU Type Uniflex Coupling Hubs w/ Keyway, Drop-Out Style - Imperial
68514452744
RRU Type Hardware
Description  N/A RRU50-HDWR PKG N/A RRU75-HDWR PKG N/A RRU87-HDWR PKG N/A RRU100-HDWR PKG N/A RRU125-HDWR PKG
Height N/A 3.00 in
Depth N/A 1.00 in
Width N/A 5.00 in
Size N/A RRU50 N/A RRU75 N/A RRU87 N/A RRU100 N/A RRU125
Type N/A Drop-Out
Material N/A Steel
Set Screw Size N/A 1/4-20 N/A 1/4-20 N/A 1/4-20 N/A 1/4-20 N/A 3/8-16
Overall Length N/A 3.520 in89.41 mm N/A 4.270 in108.46 mm N/A 4.840 in122.94 mm N/A 4.900 in124.46 mm N/A 5.840 in148.34 mm
Pin Size N/A 0.125 in N/A 0.125 in N/A 0.188 in N/A 0.313 in N/A 0.313 in
Pin Location (Dimension SL) N/A 0.500 in N/A 0.62 in N/A 0.69 in N/A 0.44 in N/A 0.560 in
Max. Torque N/A 82.00 in·lb9.30 N·m N/A 175.00 in·lb19.80 N·m N/A 346.00 in·lb39.10 N·m N/A 565.00 in·lb63.80 N·m N/A 755.00 in·lb85.30 N·m
Min. Bore (Dimensions ID1/ID2) N/A 0.375 in10.00 mm N/A 0.375 in10.00 mm N/A 0.438 in11.00 mm N/A 0.438 in11.00 mm N/A 0.625 in16.00 mm
Max. Bore (Dimensions ID1/ID2) N/A 1.000 in25.00 mm N/A 1.25 in32.00 mm N/A 1.375 in35.00 mm N/A 1.375 in35.00 mm N/A 1.625 in41 mm
Speed N/A 30000.00 rpm N/A 20000.00 rpm N/A 10000 rpm N/A 6000 rpm N/A 6000 rpm
Dimension BC N/A 1.500 in38.10 mm N/A 2.000 in50.80 mm N/A 2.250 in57.15 mm N/A 2.680 in68.07 mm N/A 3.120 in79.25 mm
Dimension D N/A 1.880 in47.75 mm N/A 2.380 in60.45 mm N/A 2.750 in69.85 mm N/A 3.120 in79.25 mm N/A 3.560 in90.42 mm
Flange Diameter (Dimension FD) N/A 2.000 in50.80 mm N/A 2.500 in63.50 mm N/A 2.880 in73.15 mm N/A 3.250 in82.55 mm N/A 3.680 in93.47 mm
Dimension FL N/A N/A N/A N/A 0.500 in12.70 mm N/A 0.500 in12.70 mm
Dimension FL1 N/A 0.250 in6.35 mm N/A 0.380 in9.65 mm N/A 0.380 in9.65 mm N/A 0.380 in9.65 mm N/A 0.500 in12.70 mm
Dimension HL N/A 1.000 in25.40 mm N/A 1.250 in31.75 mm N/A 1.380 in35.05 mm N/A 1.380 in35.05 mm N/A 1.620 in41.15 mm
Dimension S N/A 1.560 in39.62 mm N/A 1.810 in45.97 mm N/A 2.120 in53.85 mm N/A 2.180 in55.37 mm N/A 2.620 in66.55 mm
Max. Angular Offset N/A 4.50 º N/A 4.50 º N/A 4.50 º N/A 3.00 º N/A 4.50 º
Max. Parallel Offset N/A 0.021 in0.53 mm N/A 0.028 in0.71 mm N/A 0.035 in0.89 mm N/A 0.030 in0.76 mm N/A 0.044 in1.12 mm
Wind-Up Angle at Max. Torque N/A 1.82 º N/A 1.82 º N/A 1.68 º N/A 1.03 º N/A 1.85 º
Max. Recommended End Play N/A 0.035 in0.89 mm N/A 0.040 in1.02 mm N/A 0.040 in1.02 mm N/A 0.040 in1.02 mm N/A 0.040 in1.02 mm
Rated HP at 100 rpm N/A 0.13 hp N/A 0.28 hp N/A 0.55 hp N/A 0.90 hp N/A 1.21 hp
# of Mounting Screws Required N/A 1
Cubic inches N/A 15.00000 in³
Weight N/A 0.05 lb N/A 0.06 lb N/A 0.05 lb N/A 0.10 lb N/A 0.10 lb