The Timken Company - UF Type / RRU Drop Out

UF Type - Flange-to-Flange

This coupling is actually the center dropout section of the RRU Type, but it can be purchased separately for direct flange-to-flange mounting of the driving unit to the driven. The UF Type coupling compensates for high misalignment to protect connected equipment, yet it is also well-suited for applications which require negligible backlash or windup and reliability under high temperature conditions. Stock flange sizes are shown in the Dimensional Data table below, but other sizes can be provided to meet special mounting requirements.

This flange-to-flange type is designed to connect flange mounted equipment to another flange while compensating for misalignment. It is also the center drop out section of the RRU Type.

Note: The UF Type Drop Out does not come with assembly hardware. Assembly hardware must be purchased separately.

UF Type Uniflex Coupling Hubs, Flange-to-Flange Configuration - Imperial

UF Type Uniflex Coupling Hubs, Flange-to-Flange Configuration - Imperial-2

Unit of Measure

Items	68514413923 UF Type / RRU Drop Out	68514413929 UF Type / RRU Drop Out	68514413934 UF Type / RRU Drop Out	68514413938 UF Type / RRU Drop Out	68514413942 UF Type / RRU Drop Out
Description	N/A UF50-DROP OUT	N/A UF75-DROP OUT-S=1.81	N/A UF87-DROP OUT-S=2.12	N/A UF100-DROP OUT-S=2.18	N/A UF125-DROP OUT-S=2.62
Coupling	N/A UF50	N/A UF75	N/A UF87	N/A UF100	N/A UF125
Hub Style	N/A Drop Out
Coupling Type	N/A Flange-to-Flange
Material	N/A Steel
Set Screw Thread Size (Dimension T)	N/A No Setscrew
Length (Dimension S)	N/A 1.56 in	N/A 1.81 in	N/A 2.12 in	N/A 2.18 in	N/A 2.62 in
Color	N/A Gray/Metallic
Max. Torque	N/A 82.00 in·lb	N/A 175.00 in·lb	N/A 346.00 in·lb	N/A 565.00 in·lb	N/A 755.00 in·lb
Min. Bore (Dimension ID)	N/A 0.375 in9.53 mm	N/A 0.375 in9.53 mm	N/A 0.438 in11.13 mm	N/A 0.438 in11.13 mm	N/A 0.625 in15.88 mm
Max. Bore (Dimensions ID)	N/A 1.000 in25.40 mm	N/A 1.25 in31.75 mm	N/A 1.375 in34.93 mm	N/A 1.375 in34.93 mm	N/A 1.625 in41.28 mm
Max. 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
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 HD	N/A 2.000 in50.80 mm	N/A 2.500 in63.50 mm	N/A 2.870 in72.90 mm	N/A 2.310 in58.67 mm	N/A 2.750 in69.85 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
Pin Location (Dimension SL)	N/A 0.500 in	N/A 0.620 in	N/A 0.690 in	N/A 0.440 in	N/A 0.560 in
Pin Size	N/A 1/8 in	N/A 1/8 in	N/A 3/16 in	N/A 5/16 in	N/A 5/16 in
Mounting Screw Thread Size	N/A 1/4-20	N/A 1/4-20	N/A 1/4-20	N/A 5/16-18	N/A 5/16-18
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
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
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
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
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 3
Cubic inches	N/A 14.08000 in³	N/A 26.68750 in³	N/A 40.14490 in³	N/A 51.75625 in³	N/A 79.08762 in³
Weight	N/A 0.51 lb	N/A 0.33 lb	N/A 1.60 lb	N/A 2.10 lb	N/A 3.20 lb