The Timken Company - SC Type Spacer Coupling Hubs without Keyway, Standard Length - Inch (Imperial) Bores

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Specifically designed for the pump industry, this coupling accommodates industry standard as well as special pump/motor separation
This shaft separation facilitates easy pump repair of pump packing, bearings, and seals without disturbing pump or motor mounting and alignment
The SC Type coupling consists of two flanges, a sleeve and two shaft hubs

Quick Coupling Removal

The center drop out section consists of two flanges and the flexible sleeve
The flange is bolted to the shaft hub with four hex head cap screws
The center drop out section can be removed by removing the hex head cap screws
Flats on each hub provides a convenient grip for a wrench in order to facilitate loosening of the screws and, if desired, turning of the pump/motor shafts
Once the hub is removed from the pump shaft, maintenance on the pump can be done without disturbing equipment alignment

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Unit of Measure

Items	68514436710 SC Type Spacer Coupling Hubs without Keyway, Standard Length - Inch (Imperial) Bores	68514436712 SC Type Spacer Coupling Hubs without Keyway, Standard Length - Inch (Imperial) Bores	68514436714 SC Type Spacer Coupling Hubs without Keyway, Standard Length - Inch (Imperial) Bores	68514436718 SC Type Spacer Coupling Hubs without Keyway, Standard Length - Inch (Imperial) Bores	68514436721 SC Type Spacer Coupling Hubs without Keyway, Standard Length - Inch (Imperial) Bores
Description	N/A 5SCH-SPCR HUB-1/2-NKW	N/A 6SCH-SPCR HUB-5/8-NKW	N/A 7SCH-SPCR HUB-5/8-NKW	N/A 8SCH-SPCR HUB-3/4-NKW	N/A 9SCH-SPCR HUB-7/8-NKW
Bore Size	N/A 1/2 in	N/A 5/8 in	N/A 5/8 in	N/A 3/4 in	N/A 7/8 in
Coupling Type	N/A Coupling Hubs
Hub #	N/A 5SCH	N/A 6SCH	N/A 7SCH	N/A 8SCH	N/A 9SCH
Material	N/A Cast Iron
Thread (Dimension T)	N/A 5/16-18	N/A 5/16-18	N/A 5/16-18	N/A 3/8-16	N/A 3/8-16
Keyway Size (W x D)	N/A No Keyway
Outside Diameter	N/A 2.000 in50.80 mm	N/A 2.500 in63.50 mm	N/A 2.810 in71.37 mm	N/A 3.250 in82.55 mm	N/A 3.630 in92.20 mm
Color	N/A Gray
Nominal Torque (with EPDM Sleeve)	N/A 240 in·lb	N/A 450 in·lb	N/A 725 in·lb	N/A 1135 in·lb	N/A 1800 in·lb
Bore Type	N/A Finished Bore
Max. Bore	N/A 1.125 in	N/A 1.375 in	N/A 1.625 in	N/A 1.875 in	N/A 2.125 in
Max. Speed	N/A 7600.00 rpm	N/A 6000 rpm	N/A 5250.00 rpm	N/A 4500 rpm	N/A 3750.00 rpm
Dimension L	N/A 1.090 in27.69 mm	N/A 1.220 in30.99 mm	N/A 1.470 in37.34 mm	N/A 1.720 in43.69 mm	N/A 1.970 in50.04 mm
Dimension SL	N/A 0.540 in13.72 mm	N/A 0.630 in16.00 mm	N/A 0.710 in18.03 mm	N/A 0.660 in16.76 mm	N/A 1.170 in29.72 mm
Torsional Stiffness	N/A 916.00 in·lb/rad	N/A 1718.00 in·lb/rad	N/A 2769.00 in·lb/rad	N/A 4335.00 in·lb/rad	N/A 6875.00 in·lb/rad
Rated HP at 100 rpm	N/A 0.40 hp	N/A 0.70 hp	N/A 1.20 hp	N/A 1.80 hp	N/A 2.90 hp
Rated HP at 1,200 rpm	N/A 4.60 hp	N/A 8.60 hp	N/A 14.00 hp	N/A 22.00 hp	N/A 34.00 hp
Rated HP at 1,800 rpm	N/A 6.90 hp	N/A 12.90 hp	N/A 21.00 hp	N/A 32.00 hp	N/A 51.00 hp
Rated HP at 3,600 rpm	N/A 13.70 hp	N/A 25.70 hp	N/A 41.00 hp	N/A 65.00 hp	N/A 103.00 hp
# of Cap Screws Required	N/A 4
Cap Screw Required Size	N/A #10 - 1-1/2	N/A 1/4 - 1-3/4	N/A 1/4 - 1-7/8	N/A 5/16 - 2-1/4	N/A 3/8 - 2-3/4
Coupling Type	N/A S-Flex
Weight	N/A 0.96 lb	N/A 1.60 lb	N/A 2.42 lb	N/A 3.63 lb	N/A 5.30 lb
Cubic inches	N/A 4.36000 in³	N/A 7.62500 in³	N/A 11.60727 in³	N/A 18.16750 in³	N/A 25.95849 in³