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    22 Products

    Keyless Locking Rigid Shaft Couplings for Overhung Loads

    Support the weight of a motor and transfer torque to another shaft at the same time with these couplings. Often used to hang motors from conveyor belts and other driven equipment, or to connect long sections of shafts, these couplings eliminate the need for support brackets. Use a torque arm to prevent hanging motors from spinning.
    The clamping screws on the coupling face squeeze two outer collars against an inner ring, pressing it tight against shafts to lock them together. This ring-locking mechanism leaves no room for backlash, meaning that all of the turning force created by the motor is passed on to the second shaft. These couplings grip shafts of any shape, so you can install them onto existing keyways and splines without using a key.
    To install these couplings, use a torque wrench to tighten each screw to the fastener tightening torque listed for each coupling size. To remove, gradually loosen each screw in sequence until you can slide the coupling on the shaft. Warning: Do not remove any clamping screws from the coupling until the outer collars are separated from the inner ring. The ring is under tension, and a sudden release of the collars can cause serious injury.
    Overhung load capacity is the amount of downward force that a coupling can withstand from a motor or other object that it is supporting. To calculate the overhung load, measure the distance from the center of the coupling to the center of gravity of the motor. Multiply that distance by the combined weight of the motor and the portion of the shaft between the coupling and the motor. Do not exceed the overhung load capacity for a coupling.
    Steel
    Image of Product. Front orientation. Rigid Shaft Couplings. Keyless Locking Rigid Shaft Couplings for Overhung Loads .
    For Shaft
    Dia.
    Overall
    Lg.
    OD
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Fastener Tightening
    Torque, in·lbf
    Overhung Load
    Cap., in·lbf
    For Rotary Motion
    Each
    For Keyed, Round, and Splined Shafts
    1 1/4"1 7/8"3"10,0008,4351042,105Forward/Reverse, Start/Stop, Continuous3456N110000000
    1 3/8"1 7/8"3"10,0009,2851042,320Forward/Reverse, Start/Stop, Continuous3456N12000000
    1 1/2"2 3/16"3 3/4"8,00017,1602644,290Forward/Reverse, Start/Stop, Continuous3456N13000000
    1 3/4"2 3/16"3 3/4"8,00020,0252645,005Forward/Reverse, Start/Stop, Continuous3456N14000000
    2"2 11/16"4 7/16"7,70032,6852648,170Forward/Reverse, Start/Stop, Continuous3456N15000000
    2 1/4"3 1/16"4 3/4"7,50044,13526411,030Forward/Reverse, Start/Stop, Continuous3456N16000000
    2 1/2"3 1/16"4 3/4"7,50049,04026412,260Forward/Reverse, Start/Stop, Continuous3456N17000000
     

    Spider Couplings

    Image of System. Front orientation. Contains Annotated. Flexible Shaft Couplings. Spider Couplings.
    With two hubs gripping a rubbery spider in the center, these couplings damp vibration and transfer torque while flexing to handle misaligned shafts. The metal hubs never touch each other, so there's no need for lubrication. Also known as Lovejoy® couplings. For a complete coupling, select two hubs and one spider or two hubs, one split spider, and one retaining ring. Choose components with the same trade size to ensure they'll fit together.
    Hubs
    Image of Product. Front orientation. Flexible Shaft Couplings. Spider Couplings, Hubs.
    The metal body mounts onto shafts to transmit torque from one shaft to the other through the flexible center.
    Splined—Grooves on the hub fit with splines on a shaft.
    Iron—Best for dry environments, since moisture will cause these hubs to rust.
    Clamp-On Shaft Mount—Grip shafts evenly without marring them and hold tighter than set screws. Tighten the clamping screws to secure.
    OD
    Shaft Coupling
    Trade Size
    Overall
    Lg.
    Shaft Mount
    Type
    Choose a Shaft Dia.
    Each
    Splined
     
    Iron
    2 7/64"L0902 3/16"Clamp On
    		A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754")9843T1000000
    2 7/64"L0952 9/16"Clamp On
    		A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754")9843T200000
    2 17/32"L0992 7/8"Clamp On
    		A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877")9843T300000
    2 17/32"L1003 1/2"Clamp On
    		A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877")9843T400000
    3 21/64"L1104 1/4"Clamp On
    		A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877"), C (X 1 1/4", Y 1.087")9843T5000000
    3 3/4"L1504 1/2"Clamp On
    		A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877"), C (X 1 1/4", Y 1.087"), D (X 1 3/4", Y 1.506"), E (X 1 3/4", Y 1.506")9843T6000000
     

    Splined-to-Keyed Spider Couplings

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

    Diameter

    Connect heavy duty machinery with splined shafts to components with keyed shafts—a hydraulic pump and an electric motor, for example. A central spider damps vibration, absorbs shock, and adjusts for misalignment. No lubrication required. For a complete coupling, select two hubs and one spider. Choose components of the same trade size to ensure they'll fit together.
    Hubs
    Image of Product. Front orientation. Flexible Shaft Couplings. Splined-to-Keyed Spider Couplings, Hubs.
    The metal body mounts onto shafts to transmit torque from one shaft to the other through the flexible center.
    Iron—Best for dry environments, since moisture will cause these hubs to rust.
    Hubs
    Keyed Hubs
    OD
    Shaft Coupling
    Trade Size
    Overall
    Lg.
    Choose a Shaft Dia.
    Each
    Choose a Shaft Diameter
    Each
    Iron
    2 7/64"L0902 3/16"A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754")9843T1010000003/8", 1/2", 5/8", 3/4", 1"3451N801000000
    2 17/32"L0992 7/8"A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877")9843T301000001/2", 5/8", 3/4", 1", 1 1/8"3451N80200000
    3 3/4"L1504 1/2"A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877"), C (X 1 1/4", Y 1.087"), D (X 1 3/4", Y 1.506"), E (X 1 3/4", Y 1.506")9843T6010000005/8", 3/4", 1", 1 1/8", 1 1/4", 1 1/2", 1 3/4"3451N80300000
     
    Spiders
    Misalignment
    Capability
    For Hub OD
    Shaft Coupling
    Trade Size
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Each
    Buna-N
    2 7/64", 54 mmL090, L0959,0001400.015"1°6408K75000000
    2 17/32", 2 35/64", 65 mmL099, L1007,0003150.015"1°6408K7700000
    3 3/4", 96 mmL1505,0001,2400.015"1°6408K8100000
     
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