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    24 Products

    Rod Alignment Couplers

    Image of Product. Front orientation. Rod Alignment Couplers.
    Image of Attribute. Angle of Misalignment. Front orientation. Contains Annotated.

    Angle of Misalignment

    Increase cylinder life by fixing alignment problems between air or hydraulic cylinders and driven components. Couplers have a threaded end that moves to compensate for the angle of misalignment, reducing wear on cylinder bearings and seals. Couplers have a male and female end.
    Thread
    Size
    Body
    Material
    OD
    Overall
    Lg.
    Each
    5° of Misalignment
    5/16"-18
    		Steel1.56"2 1/4"6418T120000000
     

    Machinable-Bore Flexible Shaft Couplings

    Image of System. Hubs and Spider Shown Assembled. Front orientation. Contains Annotated. Flexible Shaft Couplings. Machinable-Bore Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Flexible Shaft Couplings. Machinable-Bore Flexible Shaft Couplings.

    Hubs and Spider Shown

    Assembled

    (Each Component Sold

    Separately)

    Customize the bore of these flexible couplings to align uncommon shaft sizes as well as shafts that have become undersized from wear or oversized from coatings. Also known as Lovejoy® couplings, these three-piece couplings 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 (all components sold separately). Fasten to your shaft with set screws (not included), which bite into the shaft for a secure hold. If the spider fails, the hubs will lock together, giving you time to shut down your equipment to prevent component damage and replace the spider. These couplings do not need lubrication.
    Iron Hubs and Buna-N Spiders
    Buna-N—Buna-N spiders are the most commonly used because they damp the most vibration, making them best for forward/reverse and start/stop motion. They resist oil and chemicals.
    Hubs
    Buna-N Spiders
    For Set
    Screw
    Misalignment Capability
    For Shaft Dia.
    Overall
    Lg.
    OD
    For Rotary Motion
    Fabrication
    Type
    Thread
    Size
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider
    Material
    Each
    7/16" to 1 1/8"2 1/2"2 7/64"Forward/Reverse, Start/StopSinteredCup Point5/16"-18
    		3530N1150000009,0001400.015"1°-40 to 212Buna-N
    		6408K75000000
    7/16" to 1 3/16"2 27/32"2 35/64"Forward/Reverse, Start/StopSinteredCup Point5/16"-18
    		3530N116000007,0003150.015"1°-40 to 212Buna-N
    		6408K7700000
    7/16" to 1 3/8"3 31/64"2 35/64"Forward/Reverse, Start/StopSinteredCup Point5/16"-18
    		3530N117000007,0003150.015"1°-40 to 212Buna-N
    		6408K7700000
    5/8" to 1 5/8"4 7/32"3 21/64"Forward/Reverse, Start/StopSinteredCup Point5/16"-18
    		3530N118000005,0007900.015"1°-40 to 212Buna-N
    		6408K7900000
    Iron Hubs and Polyurethane Spiders
    Polyurethane Rubber—Polyurethane spiders can run at a higher torque than Buna-N spiders, but do not offer as much vibration damping. Use them for continuous motion. Similar to Buna-N, they resist oil and chemicals.
    Hubs
    Polyurethane Spiders
    For Set
    Screw
    Misalignment Capability
    For Shaft Dia.
    Overall
    Lg.
    OD
    For Rotary
    Motion
    Fabrication
    Type
    Thread
    Size
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider Material
    Each
    7/16" to 1 1/8"2 1/2"2 7/64"ContinuousSinteredCup Point5/16"-18
    		3530N3150000003,6002100.015"1°-30 to 160Polyurethane Rubber
    		2410K13000000
    7/16" to 1 3/16"2 27/32"2 35/64"ContinuousSinteredCup Point5/16"-18
    		3530N316000003,6004750.015"1°-30 to 160Polyurethane Rubber
    		2410K1500000
    7/16" to 1 3/8"3 31/64"2 35/64"ContinuousSinteredCup Point5/16"-18
    		3530N317000003,6004750.015"1°-30 to 160Polyurethane Rubber
    		2410K1500000
    5/8" to 1 5/8"4 7/32"3 21/64"ContinuousSinteredCup Point5/16"-18
    		3530N318000003,6001,1850.015"1°-30 to 160Polyurethane Rubber
    		2410K17000000
    Iron Hubs and Hytrel Spiders
    Hytrel—Hytrel spiders operate at the highest torque, but are less flexible than Buna-N and polyurethane spiders so they have less misalignment and vibration damping capabilities. Use them for continuous motion. Compared to Buna-N and polyurethane, these have the best oil and chemical resistance.
    Hubs
    Hytrel Spiders
    For Set
    Screw
    Misalignment Capability
    For Shaft Dia.
    Overall
    Lg.
    OD
    For Rotary
    Motion
    Fabrication
    Type
    Thread
    Size
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider
    Material
    Each
    7/16" to 1 1/8"2 1/2"2 7/64"ContinuousSinteredCup Point5/16"-18
    		3530N2150000003,6004000.015"0.5°-55 to 245Hytrel6408K95000000
    7/16" to 1 3/16"2 27/32"2 35/64"ContinuousSinteredCup Point5/16"-18
    		3530N216000003,6007900.015"0.5°-55 to 245Hytrel6408K96000000
    7/16" to 1 3/8"3 31/64"2 35/64"ContinuousSinteredCup Point5/16"-18
    		3530N217000003,6007900.015"0.5°-55 to 245Hytrel6408K96000000
    5/8" to 1 5/8"4 7/32"3 21/64"ContinuousSinteredCup Point5/16"-18
    		3530N218000003,6002,2650.015"0.5°-55 to 245Hytrel6408K97000000

    Precision Double U-Joints

    Image of Product. Front orientation. U-Joints. Precision Double U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Precision Double U-Joints.
    Since these U-joints have zero backlash (no play), there’s no motion lost when your shafts change direction, so machines move smoothly with more accurate, repeatable motion. As double U-joints, they connect and transfer torque between two shafts that are either parallel to each other or are misaligned at an angle. They also keep parallel shafts moving in sync by making the output shaft move at the same rate as the input shaft. And because their ball bearings operate with less friction than pin-and-block joints, they run at higher speeds. Made of stainless steel, these U-joints balance strength with good corrosion resistance.
    They come lubricated, so you won’t need to lubricate them during installation. Connect them to shafts using the included set screws. Unlike U-joints that use spring pins, there’s no drilling required.
    Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
    For
    Shaft
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall
    Lg.
    OD
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    5° Operating Angle
    10° Operating Angle
    Parallel Misalignment
    Capability
    Joint Type
    For Shaft
    Type
    Each
    303 Stainless Steel
    1"1 1/2"1 1/2"6 3/4"2 1/2"10°1,500600468.7 in·lbf @ 750 rpm374.9 in·lbf @ 750 rpm0.75"Ball BearingRound3945N15000000000
     

    Precision Single U-Joints

    Image of Product. Front orientation. U-Joints. Precision Single U-Joints, Ball-Bearing Joint.
    Image of Attribute. Front orientation. Contains Annotated. Precision Single U-Joints, Ball-Bearing Joint.

    Ball-Bearing Joint

    Ball-Bearing Joint

    A good choice when you need accurate and repeatable motion, these U-joints have zero backlash (no play), so there’s no motion lost when your shafts change direction. This keeps machines running smoothly. They’re single U-joints, so they connect and transfer torque between shafts that are misaligned at an angle.
    Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
    Ball-Bearing Joint—Ball-bearing U-joints operate with less friction than pin-and-block joints, so they run at higher speeds.
    303 Stainless Steel—303 stainless steel U-joints balance strength with good corrosion resistance.
    Set-Screw Shaft Mount—U-joints that connect with set screws don’t require you to drill any holes.
    Lubricated—Lubricated U-joints don’t require lubrication during installation.
    For
    Shaft
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall
    Lg.
    OD
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    5° Operating Angle
    10° Operating Angle
    Shaft Mount
    Type
    Lubrication
    Each
    Ball-Bearing Joint
     
    303 Stainless Steel
    1"1 1/2"1 1/2"4 1/2"2 1/2"10°1,500600468.7 in·lbf @ 750 rpm374.9 in·lbf @ 750 rpmSet ScrewLubricated6441K150000000
     
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