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    36 Products

    Splined Flexible Shaft Couplings

    Image of System. Components of a Coupling Shown Assembled. Front orientation. Contains Annotated. Flexible Shaft Couplings. Splined Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Exploded view. Contains Annotated. Flexible Shaft Couplings. Splined Flexible Shaft Couplings.
    Image of Specification. Diameter. Front orientation. Contains Annotated. Flexible Shaft Couplings. Splined Flexible Shaft Couplings.

    Components of

    a Coupling

    Shown Assembled

    (Each Component Sold

    Separately)

    Diameter

    For use with splined shafts, which are commonly found in gearboxes and pumps, these couplings are capable of transmitting more torque than couplings for round and keyed shafts. They have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment.
    A complete coupling consists of two hubs and one spider (each component sold separately). Hubs fasten onto your shafts without damaging them. Tighten the clamping screws to secure.
    Buna-N—Buna-N spiders provide good vibration damping and chemical resistance.
    Hytrel—Hytrel spiders provide fair vibration damping and excellent chemical resistance.
    Polyurethane Rubber—Polyurethane spiders provide fair vibration damping and good chemical resistance.
    Hubs
    Buna-N Spiders
    Hytrel Spiders
    Polyurethane Spiders
    Misalignment Capability
    Misalignment Capability
    Misalignment Capability
    Overall
    Lg.
    OD
    For Shaft
    Type
    Pitch
    Pressure
    Angle
    For Rotary Motion
    Choose an SAE Spline Size (Diameter X × Diameter Y)
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider
    Material
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider
    Material
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider Material
    Each
     
    Iron Hubs
    2 3/16"2 7/64"Splined0.5"30°Continuous, Forward/Reverse, Start/StopA (5/8" × 0.509"), B (7/8" × 0.754")9843T10000009,0001400.015"1°-40 to 212Buna-N
    		6408K750000003,6004000.015"0.5°-55 to 245Hytrel6408K950000003,6002100.015"1°-30 to 160Polyurethane Rubber
    		2410K13000000
    2 9/16"2 7/64"Splined0.5"30°Continuous, Forward/Reverse, Start/StopA (5/8" × 0.509"), B (7/8" × 0.754")9843T2000009,0001400.015"1°-40 to 212Buna-N
    		6408K75000003,6004000.015"0.5°-55 to 245Hytrel6408K95000003,6002100.015"1°-30 to 160Polyurethane Rubber
    		2410K1300000
    2 7/8"2 17/32"Splined0.5"30°Continuous, Forward/Reverse, Start/StopA (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877")9843T3000007,0003150.015"1°-40 to 212Buna-N
    		6408K77000003,6007900.015"0.5°-55 to 245Hytrel6408K960000003,6004750.015"1°-30 to 160Polyurethane Rubber
    		2410K1500000
    3 1/2"2 17/32"Splined0.5"30°Continuous, Forward/Reverse, Start/StopA (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877")9843T4000007,0003150.015"1°-40 to 212Buna-N
    		6408K77000003,6007900.015"0.5°-55 to 245Hytrel6408K960000003,6004750.015"1°-30 to 160Polyurethane Rubber
    		2410K1500000
    4 1/4"3 21/64"Splined0.5"30°Continuous, Forward/Reverse, Start/StopA (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087")9843T50000005,0007900.015"1°-40 to 212Buna-N
    		6408K79000003,6002,2650.015"0.5°-55 to 245Hytrel6408K970000003,6001,1850.015"1°-30 to 160Polyurethane Rubber
    		2410K17000000
    4 1/2"3 3/4"Splined0.5"30°Continuous, Forward/Reverse, Start/StopA (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087"), D (1 3/4" × 1.506"), E (1 3/4" × 1.506")9843T60000005,0001,2400.015"1°-40 to 212Buna-N
    		6408K81000003,6003,7050.015"0.5°-55 to 245Hytrel6408K980000003,6001,8600.015"1°-30 to 160Polyurethane Rubber
    		2410K19000000
     

    Splined-to-Keyed Flexible Shaft Couplings

    Image of System. Front orientation. Contains Annotated. Flexible Shaft Couplings. Splined-to-Keyed Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Exploded view. Contains Annotated. Flexible Shaft Couplings. Splined-to-Keyed Flexible Shaft Couplings.

    (Each Component Sold Separately)

    Image of Specification. Diameter. Front orientation. Contains Annotated. Flexible Shaft Couplings. Splined-to-Keyed Flexible Shaft Couplings.

    Diameter

    Connect splined shafts to keyed shafts. These couplings are commonly used to connect hydraulic pumps, compressors, and other heavy duty equipment, which often have splined shafts, to electric motors and other components that often have keyed shafts. They have a splined hub on one side and a keyed hub on the other. A spider cushion in the middle damps vibration, absorbs shock loads, and adjusts for misalignment. Because the hubs interlock with the spider, these couplings will continue to work even if the spider breaks or wears away. This fail-safe design gives you time to shut down your power source before damage occurs to other components. Lubrication is not required.
    A complete coupling consists of two hubs and one spider. All components are sold separately.
    Splined Iron Hubs and Buna-N Spiders—For Forward/Reverse, Start/Stop Motion
    Buna-N—Buna-N spiders are best for high-speed systems and jobs with frequent starting, stopping, and reversing. The most commonly used spider material, Buna-N absorbs vibration better than other materials but cannot handle as much torque. It won't break down when exposed to oil and chemicals.
    Hubs
    Keyed Iron Hubs
    Buna-N Spiders
    Misalignment Capability
    Overall
    Lg.
    OD
    Pitch
    Pressure
    Angle
    Choose an SAE Spline Size (Diameter X × Diameter Y)
    Each
    Choose a Shaft Diameter
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider
    Material
    Each
    2 3/16"2 7/64"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754")9843T1010000003/8", 1/2", 5/8", 3/4", 1"3451N8010000009,0001400.015"1°-40 to 212Buna-N
    		6408K75000000
    2 7/8"2 17/32"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877")9843T301000001/2", 5/8", 3/4", 1", 1 1/8"3451N802000007,0003150.015"1°-40 to 212Buna-N
    		6408K7700000
    4 1/2"3 3/4"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087"), D (1 3/4" × 1.506"), E (1 3/4" × 1.506")9843T6010000005/8", 3/4", 1", 1 1/8", 1 1/4", 1 1/2", 1 3/4"3451N803000005,0001,2400.015"1°-40 to 212Buna-N
    		6408K8100000
    Splined Iron Hubs and Polyurethane Rubber Spiders—For Continuous Motion
    Polyurethane Rubber—Use polyurethane spiders for high-torque, continuous-motion applications where vibration is a concern. They absorb vibration better than Hytrel spiders but are not as resistant to oil and chemicals. They're not for use in applications with frequent starting, stopping, and reversing.
    Hubs
    Keyed Iron Hubs
    Polyurethane Spiders
    Misalignment Capability
    Overall
    Lg.
    OD
    Pitch
    Pressure
    Angle
    Choose an SAE Spline Size (Diameter X × Diameter Y)
    Each
    Choose a Shaft Diameter
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider Material
    Each
    2 3/16"2 7/64"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754")9843T1020000003/8", 1/2", 5/8", 3/4", 1"3451N8040000003,6002100.015"1°-30 to 160Polyurethane Rubber
    		2410K13000000
    2 7/8"2 17/32"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877")9843T302000001/2", 5/8", 3/4", 1", 1 1/8"3451N805000003,6004750.015"1°-30 to 160Polyurethane Rubber
    		2410K1500000
    4 1/2"3 3/4"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087"), D (1 3/4" × 1.506"), E (1 3/4" × 1.506")9843T6020000005/8", 3/4", 1", 1 1/8", 1 1/4", 1 1/2", 1 3/4"3451N806000003,6001,8600.015"1°-30 to 160Polyurethane Rubber
    		2410K19000000
    Splined Iron Hubs and Hytrel Spiders—For Continuous Motion
    Hytrel—Hytrel spiders handle the highest torque of any of our spiders and have the best resistance to oil and chemicals. However, they don't compensate for as much misalignment and are not recommended for applications with frequent starting, stopping, and reversing.
    Hubs
    Keyed Iron Hubs
    Hytrel Spiders
    Misalignment Capability
    Overall
    Lg.
    OD
    Pitch
    Pressure
    Angle
    Choose an SAE Spline Size (Diameter X × Diameter Y)
    Each
    Choose a Shaft Diameter
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider
    Material
    Each
    2 3/16"2 7/64"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754")9843T1030000003/8", 1/2", 5/8", 3/4", 1"3451N8070000003,6004000.015"0.5°-55 to 245Hytrel6408K95000000
    2 7/8"2 17/32"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877")9843T303000001/2", 5/8", 3/4", 1", 1 1/8"3451N808000003,6007900.015"0.5°-55 to 245Hytrel6408K96000000
    4 1/2"3 3/4"0.5"30°A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087"), D (1 3/4" × 1.506"), E (1 3/4" × 1.506")9843T6030000005/8", 3/4", 1", 1 1/8", 1 1/4", 1 1/2", 1 3/4"3451N809000003,6003,7050.015"0.5°-55 to 245Hytrel6408K98000000
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