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    181 Products

    Single U-Joints

    Image of Product. Side1 orientation. U-Joints. Single U-Joints, Pin-and-Block Joint.
    Image of Product. Front orientation. U-Joints. Single U-Joints, Ball-and-Socket Joint.

    Pin-and-Block Joint

    Ball-and-Socket Joint

    Image of Attribute. Front orientation. Contains Annotated. Single U-Joints, Pin-and-Block Joint.
    Image of Attribute. Front orientation. Contains Annotated. Single U-Joints, Ball-and-Socket Joint.

    Pin-and-Block Joint

    Ball-and-Socket Joint

    Connect and transfer torque between two shafts that are misaligned at an angle. Your shafts’ misalignment will affect the speed and torque these U-joints will be able to transmit. The more the shafts are misaligned, the less speed and torque they’ll be able to transmit.
    Pin-and-Block Joint—Pin-and-block U-joints handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots).
    Ball-and-Socket Joint—Ball-and-socket U-joints rotate in any direction, just like your shoulder. They have an oil reservoir that holds lubricant and feeds it slowly to the ball and socket.
    Steel—Steel U-joints are strong and handle more torque than zinc alloy U-joints.
    Zinc Alloy—Zinc alloy U-joints are for hand-powered, low-speed applications. They are more corrosion resistant than steel U-joints.
    For Keyed Shafts—U-joints for keyed shafts connect to shafts with set screws. Unlike U-joints that use spring pins, there’s no drilling required.
    For Round Shafts—U-joints for round shafts connect to shafts with spring pins (included with some U-joints).
    Spring Pins Not Included— U-joints without spring pins require you to drill holes through both the U-joint and your shafts.
    Spring Pins Included—U-joints with spring pins already have holes, so you only need to drill holes through your shafts.
    For
    Shaft
    Torque
    Dia.
    Dp.
    Joint Dia.
    Overall
    Lg.
    OD
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Shaft Mount
    Type
    Spring Pins
    Included
    Each
    Pin-and-Block Joint
     
    Steel—For Keyed Shafts
    3/8" × 1/4"15/16"3/4"2 11/16"45°1,0001,250336 in·lbf @ 300 rpm101 in·lbf @ 300 rpmSet Screw6443K2110000000
    1/2"1"1"3 3/8"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpmSet Screw8285K33000000
    1/2" × 3/8"1 3/16"1"3 3/8"45°1,0002,250608 in·lbf @ 300 rpm183 in·lbf @ 300 rpmSet Screw6443K209000000
    9/16"1"1"3 3/8"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpmSet Screw8285K11000000
    5/8"1"1 1/8"3 1/2"25°1,7502,880785 in·lbf @ 300 rpm260 in·lbf @ 300 rpmSet Screw8285K13000000
    5/8" × 1/2"1 1/4"1 1/4"3 3/4"45°1,0005,200942 in·lbf @ 300 rpm282 in·lbf @ 300 rpmSet Screw6443K208000000
    3/4"1 1/16"1 1/4"3 3/4"25°1,7505,220980 in·lbf @ 300 rpm330 in·lbf @ 300 rpmSet Screw8285K15000000
    3/4" × 1/2"1 3/8"1 1/2"4 1/4"45°1,00010,0001,453 in·lbf @ 300 rpm436 in·lbf @ 300 rpmSet Screw6443K207000000
    3/4" × 5/8"1 3/8"1 1/2"4 1/4"45°1,00010,0001,453 in·lbf @ 300 rpm436 in·lbf @ 300 rpmSet Screw6443K206000000
    7/8"1 3/8"1 3/4"5"25°1,75010,6802,005 in·lbf @ 300 rpm675 in·lbf @ 300 rpmSet Screw8285K25000000
    1"1 3/8"1 3/4"5"25°1,75010,6802,005 in·lbf @ 300 rpm675 in·lbf @ 300 rpmSet Screw8285K18000000
    1" × 1/2"1 5/8"1 3/4"5"45°1,00014,5002,002 in·lbf @ 300 rpm601 in·lbf @ 300 rpmSet Screw6443K205000000
    1" × 5/8"1 5/8"1 3/4"5"45°1,00014,5002,002 in·lbf @ 300 rpm601 in·lbf @ 300 rpmSet Screw6443K204000000
    1" × 3/4"1 5/8"1 3/4"5"45°1,00014,5002,002 in·lbf @ 300 rpm601 in·lbf @ 300 rpmSet Screw6443K203000000
    1 3/16"1 1/2"2"5 7/16"25°1,75015,6002,635 in·lbf @ 300 rpm885 in·lbf @ 300 rpmSet Screw8285K31000000
    1 1/4" × 1"2 1/16"2 1/2"7"45°1,00032,0003,964 in·lbf @ 300 rpm1,189 in·lbf @ 300 rpmSet Screw6443K20200000000
    1 1/4" × 1 1/8"2 1/16"2 1/2"7"45°1,00032,0003,964 in·lbf @ 300 rpm1,189 in·lbf @ 300 rpmSet Screw6443K20100000000
    1 1/2"2"2 1/2"7"25°1,75033,1203,950 in·lbf @ 300 rpm1,330 in·lbf @ 300 rpmSet Screw8285K22000000
    1 13/16"2 3/4"3"9 1/16"25°1,75065,4005,750 in·lbf @ 300 rpm1,940 in·lbf @ 300 rpmSet Screw8285K2400000000
     
    Steel—For Round Shafts
    1/4"5/8"1/2"2"25°1,750375150 in·lbf @ 300 rpm51 in·lbf @ 300 rpmSpring PinNo6443K24000000
    5/16"11/16"5/8"2 1/4"25°1,750540245 in·lbf @ 300 rpm83 in·lbf @ 300 rpmSpring PinNo6443K46000000
    3/8"7/8"3/4"2 11/16"25°1,750765330 in·lbf @ 300 rpm110 in·lbf @ 300 rpmSpring PinNo6443K27000000
    7/16"7/8"7/8"3"25°1,7501,175445 in·lbf @ 300 rpm150 in·lbf @ 300 rpmSpring PinNo6443K28000000
    1/2"1"1"3 3/8"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpmSpring PinNo6443K49000000
    9/16"1"1 1/8"3 1/2"25°1,7502,880785 in·lbf @ 300 rpm260 in·lbf @ 300 rpmSpring PinNo6443K39000000
    5/8"1 1/16"1 1/4"3 3/4"25°1,7505,220980 in·lbf @ 300 rpm330 in·lbf @ 300 rpmSpring PinNo6443K62000000
    3/4"1 3/16"1 1/2"4 1/4"25°1,7507,9201,425 in·lbf @ 300 rpm480 in·lbf @ 300 rpmSpring PinNo6443K65000000
    7/8"1 3/8"1 3/4"5"25°1,75010,6802,005 in·lbf @ 300 rpm675 in·lbf @ 300 rpmSpring PinNo6443K74000000
    1"1 1/2"2"5 7/16"25°1,75015,6002,635 in·lbf @ 300 rpm885 in·lbf @ 300 rpmSpring PinNo6443K75000000
    1 1/4"2"2 1/2"7"25°1,75033,1203,950 in·lbf @ 300 rpm1,330 in·lbf @ 300 rpmSpring PinNo6443K76000000
    1 1/2"2 3/4"3"9 1/16"25°1,75065,4005,750 in·lbf @ 300 rpm1,940 in·lbf @ 300 rpmSpring PinNo6443K7700000000
    10 mm7/8"7/8"3"25°1,7501,175445 in·lbf @ 300 rpm150 in·lbf @ 300 rpmSpring PinNo6443K102000000
    12 mm7/8"3/4"2 11/16"25°1,750765330 in·lbf @ 300 rpm110 in·lbf @ 300 rpmSpring PinNo6443K101000000
    14 mm1"1"3 3/8"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpmSpring PinNo6443K103000000
    20 mm1 1/16"1 1/4"3 3/4"25°1,7505,220980 in·lbf @ 300 rpm330 in·lbf @ 300 rpmSpring PinNo6443K106000000
    16 mm × 20 mm1 1/16"1 1/4"3 3/4"25°1,7505,220980 in·lbf @ 300 rpm330 in·lbf @ 300 rpmSpring PinNo6443K105000000
     
    Zinc Alloy—For Round Shafts
    1/4"9/16"9/16"2"15°Not Rated150Not RatedNot RatedSpring PinNo6445K100000
    5/16"9/16"9/16"2"15°Not Rated125Not RatedNot RatedSpring PinNo6445K200000
    3/8"7/8"13/16"2 7/8"15°Not Rated75Not RatedNot RatedSpring PinNo6445K300000
    1/2"7/8"13/16"2 7/8"15°Not Rated75Not RatedNot RatedSpring PinNo6445K400000
    5/8"15/16"1 1/8"3 1/4"15°Not Rated500Not RatedNot RatedSpring PinNo6445K500000
    3/4"15/16"1 1/8"3 1/4"15°Not Rated500Not RatedNot RatedSpring PinNo6445K600000
     
    Ball-and-Socket Joint
     
    Steel—For Round Shafts
    3/8"9/16"9/16" × 11/16"2"3/4"30°1,800635Not RatedNot RatedSpring PinYes6441K2000000
    5/8"15/16"15/16" × 1 5/32"3 13/32"1 1/4"30°1,8002,930Not RatedNot RatedSpring PinYes6441K4000000
     

    High-Torque Single U-Joints

    Image of Product. Front orientation. U-Joints. High-Torque Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. High-Torque Single U-Joints.
    With a maximum torque of at least 11,600 in.-lbs., these U-joints handle more torque than any other U-joint in our offering. They’re single U-joints, meaning they connect and transfer torque between shafts that are misaligned at an angle. Often found in continuously running applications, they operate at higher speeds and last longer than other types of joints, thanks to their needle bearings.
    Connect these U-joints to shafts using the included set screws. Unlike U-joints that use spring pins, there’s no drilling required. All have a grease fitting, so you can use a grease gun to lubricate all of the bearings at once.
    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.
    Steel—Steel U-joints are stronger and handle more torque than iron U-joints.
    For
    Shaft
    Overall
    Keyway
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Ht.
    Lg.
    Wd.
    Dp.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Includes
    Each
    Iron with Steel Bearings
    3/4"1 13/64"1 5/8"2 3/8"5"3/16"3/32"45°1,00011,6001,260 in·lbf @ 1,000 rpm720 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6452K10000000
    7/8"1 13/64"1 5/8"2 3/8"5"3/16"
    1/4"
    3/32"
    1/8"
    45°1,00011,6001,260 in·lbf @ 1,000 rpm720 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6452K3000000
    1"1 13/64"1 5/8"2 3/8"5"3/16"
    1/4"
    3/32"
    1/8"
    45°1,00011,6001,260 in·lbf @ 1,000 rpm720 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6452K5000000
    1 1/8"1 5/32"2 1/4"2 5/16"5"1/4"
    5/16"
    1/8"
    5/32"
    45°1,00011,6001,260 in·lbf @ 1,000 rpm720 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6452K6000000
    1 1/4"1 5/32"2 1/4"2 5/16"5"1/4"
    5/16"
    1/8"
    5/32"
    45°1,00011,6001,260 in·lbf @ 1,000 rpm720 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6452K7000000
     
    Steel with Steel Bearings
    3/4"1 29/64"2"2 5/8"5 1/2"3/16"3/32"45°1,00022,7002,220 in·lbf @ 1,000 rpm1,260 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6472K31000000
    7/8"1 29/64"2"2 7/16"5 1/2"1/4"1/8"45°1,00022,7002,220 in·lbf @ 1,000 rpm1,260 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6472K16000000
    1"2"2 1/16"2 5/8"7"1/4"
    3/16"
    1/8"
    3/32"
    45°1,00022,7002,220 in·lbf @ 1,000 rpm1,260 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6472K21000000
    1 1/4"1 3/16"2 1/4"2 5/8"5 1/2"1/4"1/8"45°1,00022,7002,220 in·lbf @ 1,000 rpm1,260 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6472K25000000
    1 1/2"1 3/16"2 1/4"2 5/8"5 1/2"3/8"3/16"45°1,00022,7002,220 in·lbf @ 1,000 rpm1,260 in·lbf @ 1,000 rpmNeedle BearingKeyedGrease Fitting6472K33000000
     
    Replacement U-Joint Bearings

    Precision Single U-Joints

    Image of Product. Side1 orientation. U-Joints. Precision Single U-Joints, Pin-and-Block Joint.

    Pin-and-Block

    Joint

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

    Ball-Bearing Joint

    Image of Attribute. Front orientation. Precision Single U-Joints, Pin-and-Block Joint.

    Pin-and-Block Joint

    Image of Attribute. Front orientation. Contains Annotated. Precision Single U-Joints, 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.
    Pin-and-Block Joint—Pin-and-block U-joints work well in most applications since they handle higher torque at lower speeds than joints with ball bearings.
    Ball-Bearing Joint—Ball-bearing U-joints operate with less friction than pin-and-block joints, so they run at higher speeds.
    Acetal—Acetal U-joints weigh less than metal U-joints. They protect components in your system from stray electrical currents by blocking the flow of electricity between your shafts.
    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.
    Spring-Pin Shaft Mount—U-joints that connect with spring pins require you to drill holes through both the U-joint and your shafts. Spring pins are not included.
    Lubricated—Lubricated U-joints don’t require lubrication during installation.
    Lubrication Not Required—U-joints that don’t require lubrication are often used with optical devices and other sensitive equipment because they're less likely to attract dust and debris compared to lubricated U-joints. They’re also easier to maintain.
    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
    Pin-and-Block Joint
     
    Acetal
    1/8"3/8"5/16"1.07"45°1,0004Not RatedNot RatedSet ScrewNot Required60625K84000000
    3/16"1/2"7/16"1.48"45°1,00017Not RatedNot RatedSet ScrewNot Required60625K8500000
    1/4"5/8"9/16"1.82"45°1,00040Not RatedNot RatedSet ScrewNot Required60625K8600000
    3/8"7/8"11/16"2.66"45°1,00060Not RatedNot RatedSet ScrewNot Required60625K8700000
    1/2"25/32"1 1/8"2 15/16"40°1,000301Not RatedNot RatedSpring PinNot Required6441K1600000
    5/8"27/32"1 7/16"3 3/8"40°1,000637Not RatedNot RatedSpring PinNot Required6441K1700000
    3/4"27/32"1 7/16"3 3/8"40°1,000637Not RatedNot RatedSpring PinNot Required6441K1800000
     
    Ball-Bearing Joint
     
    303 Stainless Steel
    3/32"11/32"3/16"1"30°4,00010.9 in·lbf @ 1,500 rpm0.8 in·lbf @ 1,500 rpmSpring PinNot Required60075K7400000
    1/8"3/16"3/16"1"30°4,00010.9 in·lbf @ 1,500 rpm0.8 in·lbf @ 1,500 rpmSpring PinNot Required60075K7500000
    3/16"7/16"9/32"1 3/8"30°4,00043.6 in·lbf @ 1,500 rpm3.2 in·lbf @ 1,500 rpmSpring PinNot Required60075K7600000
    1/4"1/2"3/8"1 3/4"30°4,0001614.4 in·lbf @ 1,500 rpm12.8 in·lbf @ 1,500 rpmSet ScrewNot Required60075K7700000
    3/8"3/8"3/4"2"1 3/8"20°2,0003024.9 in·lbf @ 1,000 rpm19.9 in·lbf @ 1,000 rpmSet ScrewLubricated6441K11000000
    1/2"7/8"1"2 5/8"1 7/8"20°2,0007562.5 in·lbf @ 1,000 rpm49.9 in·lbf @ 1,000 rpmSet ScrewLubricated6441K12000000
    5/8"7/8"1"2 5/8"1 7/8"20°2,0007562.5 in·lbf @ 1,000 rpm49.9 in·lbf @ 1,000 rpmSet ScrewLubricated6441K13000000
    3/4"7/8"1"2 5/8"1 7/8"20°2,0007562.5 in·lbf @ 1,000 rpm49.9 in·lbf @ 1,000 rpmSet ScrewLubricated6441K14000000
    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 ScrewLubricated6441K15000000
     

    Adjustable-Length Precision Double U-Joints

    Image of Product. Front orientation. U-Joints. Adjustable-Length Precision Double U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Adjustable-Length Precision Double U-Joints.
    Lengthen and shorten these telescoping U-joints to fit your application. They’re a good choice when you need accurate and repeatable motion because they have zero backlash (no play), so there’s no motion lost when your shafts change direction. This keeps machines running smoothly. 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. With ball bearings, there’s less friction than pin-and-block joints, so they run at higher speeds. Made of stainless steel, they balance strength without sacrificing corrosion resistance.
    Since they come lubricated, you won’t need to lubricate them during installation. Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    5° Operating Angle
    10° Operating Angle
    Parallel Misalignment
    Capability
    Joint Type
    Adjustment
    Movement
    For Shaft
    Type
    Each
    303 Stainless Steel
    1/4"3/8"3/8"2 3/4" to 3"30°4,0001614.4 in·lbf @ 1,500 rpm12.8 in·lbf @ 1,500 rpm0.7"Ball BearingTelescopeRound60075K970000000
     

    Constant-Velocity Single U-Joints

    Image of Product. Front orientation. U-Joints. Constant-Velocity Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Constant-Velocity Single U-Joints.
    To keep your shafts moving in sync, the flexible spring on these joints makes the output shaft move at the same rate as the input shaft. This spring also reduces vibration and compensates for more misalignment than standard single U-joints. However, these U-joints can’t handle as much torque. With zero backlash (no play), there’s no motion lost when you change direction. This keeps machines running smoothly with more accurate, repeatable motion. Made of stainless steel, these U-joints balance strength with good corrosion resistance.
    A good choice for optical devices and other sensitive equipment, these U-joints don’t require lubrication or gather dust and debris. They’re also easier to maintain than lubricated U-joints. They work well in assemblies that change frequently because you can quickly loosen their clamping screw to move them. This screw holds these U-joints in place without damaging your shafts. 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.
    Max. Rotation
    Speed
    Max. Torque,
    in·lbf
    3° Operating
    Angle
    10° Operating
    Angle
    Parallel Misalignment
    Capability
    Shaft Mount
    Type
    Each
    17-4 PH Stainless Steel
     
    30° Maximum Operating Angle
    1/4"5/16"3/4"1 1/2"Not Rated15Not RatedNot Rated0.063"Clamp On6970N110000000
    3/8"7/16"1"2"Not Rated38Not RatedNot Rated0.094"Clamp On6970N12000000
    1/2"9/16"1 1/4"2 1/2"Not Rated81Not RatedNot Rated0.125"Clamp On6970N13000000
     
    90° Maximum Operating Angle
    1/4"3/8"3/4"2 3/8"Not Rated15Not RatedNot Rated0.313"Clamp On6970N14000000
    3/8"7/16"1"2 7/8"Not Rated38Not RatedNot Rated0.375"Clamp On6970N15000000
    1/2"9/16"1 1/4"3 7/8"Not Rated81Not RatedNot Rated0.438"Clamp On6970N16000000
     

    Double U-Joints

    Image of Product. Front orientation. U-Joints. Double U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Double U-Joints.
    Connect and transfer torque between two shafts that are either parallel to each other or are misaligned at an angle. When shafts are parallel, these double U-joints keep them moving in sync by making the output shaft move at the same rate as the input shaft. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types, making them a good choice for most applications. Made of steel, they are strong and withstand a good amount of torque.
    To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots). Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Parallel Misalignment
    Capability
    Joint Type
    For Shaft
    Type
    Each
    Steel
    1/4"5/8"1/2"4"25°1,750375150 in·lbf @ 300 rpm51 in·lbf @ 300 rpm0.845"Pin and BlockRound6443K260000000
    5/16"11/16"5/8"4 1/2"25°1,750540245 in·lbf @ 300 rpm83 in·lbf @ 300 rpm0.951"Pin and BlockRound6443K56000000
    3/8"7/8"3/4"5 3/8"25°1,750765330 in·lbf @ 300 rpm110 in·lbf @ 300 rpm1.133"Pin and BlockRound6443K83000000
    1/2"1"1"6 3/4"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpm1.428"Pin and BlockRound6443K57000000
    5/8"1 1/16"1 1/4"7 1/2"25°1,7505,220980 in·lbf @ 300 rpm330 in·lbf @ 300 rpm1.585"Pin and BlockRound6443K85000000
    3/4"1 3/16"1 1/2"8 1/2"25°1,7507,9201,425 in·lbf @ 300 rpm480 in·lbf @ 300 rpm1.796"Pin and BlockRound6443K94000000
     

    Corrosion-Resistant Single U-Joints

    Image of Product. Side1 orientation. U-Joints. Corrosion-Resistant Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Corrosion-Resistant Single U-Joints.
    Use these U-joints in wet environments to connect and transfer torque between two shafts. Made of 303 stainless steel, they balance strength with good corrosion resistance. They’re single U-joints, so they join shafts that are misaligned at an angle. With a pin-and-block joint, they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications.
    To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots). Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Each
    303 Stainless Steel
    3/8"7/8"3/4"2 11/16"25°1,750510330 in·lbf @ 300 rpm110 in·lbf @ 300 rpmPin and BlockRound6443K510000000
    1/2"1"1"3 3/8"25°1,7501,040595 in·lbf @ 300 rpm200 in·lbf @ 300 rpmPin and BlockRound6443K53000000
    5/8"1 1/16"1 1/4"3 3/4"25°1,7503,480980 in·lbf @ 300 rpm330 in·lbf @ 300 rpmPin and BlockRound6443K78000000
    3/4"1 3/16"1 1/2"4 1/4"25°1,7505,2801,425 in·lbf @ 300 rpm480 in·lbf @ 300 rpmPin and BlockRound6443K79000000
    1"1 1/2"2"5 7/16"25°1,75010,4002,635 in·lbf @ 300 rpm885 in·lbf @ 300 rpmPin and BlockRound6443K82000000
     

    Clamp-On Single U-Joints

    Image of Product. Side1 orientation. U-Joints. Clamp-On Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Clamp-On Single U-Joints.
    Ideal for use in assemblies that change frequently, these U-joints have clamping screws that can be quickly loosened when you need to move them. These screws hold these U-joints in place without damaging your shafts, and unlike U-joints that use spring pins, there’s no drilling required. They’re single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. With a pin-and-block joint, they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. Made of steel, they’re strong and handle a good amount of torque.
    To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots).
    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
    Keyway
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall
    Lg.
    Wd.
    Dp.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Each
    Steel
    1/4"13/16"5/8"2 1/4"45°1,0001515 in·lbf @ 300 rpm15 in·lbf @ 300 rpmPin and BlockRound4133N110000000
    3/8"15/16"3/4"2 11/16"45°1,0007070 in·lbf @ 300 rpm70 in·lbf @ 300 rpmPin and BlockRound4133N12000000
    1/2"1 3/16"1"3 3/8"45°1,000250250 in·lbf @ 300 rpm250 in·lbf @ 300 rpmPin and BlockRound4133N13000000
    5/8"1 1/4"1 1/4"3 3/4"3/16"5/64"45°1,0005,200942 in·lbf @ 300 rpm282 in·lbf @ 300 rpmPin and BlockKeyed4133N14000000
    3/4"1 3/8"1 1/2"4 1/4"15/64"3/32"45°1,00010,0001,453 in·lbf @ 300 rpm436 in·lbf @ 300 rpmPin and BlockKeyed4133N15000000
    1"1 11/16"2"5 1/2"1/4"7/64"45°1,00021,5002,454 in·lbf @ 300 rpm736 in·lbf @ 300 rpmPin and BlockKeyed4133N16000000
    1 1/4"2 1/16"2 1/2"7"1/4"7/64"45°1,00032,0003,964 in·lbf @ 300 rpm1,189 in·lbf @ 300 rpmPin and BlockKeyed4133N1700000000
     

    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
    1/4"1/2"3/8"2 1/2"30°4,0001614.4 in·lbf @ 1,500 rpm12.8 in·lbf @ 1,500 rpm0.45"Ball BearingRound60075K870000000
    3/8"3/8"3/4"2 7/8"1 3/8"20°2,0003024.9 in·lbf @ 1,000 rpm19.9 in·lbf @ 1,000 rpm0.4"Ball BearingRound3945N11000000
    1/2"7/8"1"3 7/8"1 7/8"20°2,0007562.5 in·lbf @ 1,000 rpm49.9 in·lbf @ 1,000 rpm0.5"Ball BearingRound3945N12000000
    5/8"7/8"1"3 7/8"1 7/8"20°2,0007562.5 in·lbf @ 1,000 rpm49.9 in·lbf @ 1,000 rpm0.5"Ball BearingRound3945N13000000
    3/4"7/8"1"3 7/8"1 7/8"20°2,0007562.5 in·lbf @ 1,000 rpm49.9 in·lbf @ 1,000 rpm0.5"Ball BearingRound3945N14000000
    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 BearingRound3945N1500000000
     

    Sealed Single U-Joints

    Image of Product. Front orientation. U-Joints. Sealed Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Sealed Single U-Joints.
    A cover (also known as a boot or bellows) seals out contaminants and seals in lubricant. These U-joints come lubricated, so you don’t need to lubricate them during installation. They're single U-joints, which means they connect and transfer torque between two shafts that are misaligned at an angle. A good choice for operations that run continuously, they operate at higher speeds and last longer than other types of joints, thanks to their needle bearings. Made of steel, they are strong and handle a good amount of torque.
    Connect these U-joints 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
    Keyway
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall
    Lg.
    OD
    Wd.
    Dp.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Bellows
    Material
    Joint Type
    For Shaft
    Type
    Each
    Steel with Steel Bearings
    3/8"15/16"3/4"2 11/16"1 3/8"3/32"3/64"35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K220000000
    1/2"1 3/16"1"3 3/8"1 1/2"1/8"1/16"35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K23000000
    5/8"1 1/4"1 1/4"3 3/4"1 7/8"3/16"3/32"35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K24000000
    3/4"1 3/8"1 1/2"4 1/4"2 1/4"3/16"3/32"35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K25000000
    1"1 11/16"2"5 1/2"2 11/16"1/4"1/8"35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K26000000
    10 mm24 mm19 mm68 mm35 mm3 mm11 mm35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K51000000
    12 mm30 mm25 mm86 mm38 mm4 mm14 mm35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K52000000
    16 mm32 mm32 mm95 mm48 mm5 mm18 mm35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K53000000
    20 mm36 mm38 mm108 mm57 mm6 mm23 mm35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K54000000
    25 mm43 mm51 mm140 mm68 mm8 mm28 mm35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmBuna-N
    Needle BearingKeyed8284K55000000
     

    Corrosion-Resistant Mil. Spec. Machinable-Bore Single U-Joints

    Image of Product. Front orientation. U-Joints. Corrosion-Resistant Mil. Spec. Machinable-Bore Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Corrosion-Resistant Mil. Spec. Machinable-Bore Single U-Joints.
    Made to meet strict military standards for material and construction, these stainless steel U-joints also balance strength with good corrosion resistance. Customize their bores until they fit your shafts. They come apart and have a small, centered starter hole on each end to make drilling easy. Because they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications.
    Drill holes through the U-joint and your shafts and then connect using spring pins.
    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-Spring Oil Fitting—U-joints with a ball-spring oil fitting keep lubricant in the joint.
    Torque
    For Max.
    Shaft Dia.
    For Max.
    Shaft Dp.
    Joint
    Dia.
    Overall
    Lg.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Includes
    Mil. Spec.
    Each
    303 Stainless Steel
    7/32"11/16"3/8"1 3/4"35°1,500100Not RatedNot RatedPin and BlockRoundMIL-U-20625 Class C2457K310000000
    9/32"3/4"1/2"2"35°1,500375Not RatedNot RatedPin and BlockRoundMIL-U-20625 Class C2457K32000000
    3/8"13/16"5/8"2 1/4"35°1,500610Not RatedNot RatedPin and BlockRoundMIL-U-20625 Class C2457K33000000
    7/16"31/32"3/4"2 11/16"35°1,5001,000Not RatedNot RatedPin and BlockRoundMIL-U-20625 Class C2457K34000000
    1/2"1 1/32"7/8"3"35°1,5001,350Not RatedNot RatedPin and BlockRoundMIL-U-20625 Class C2457K35000000
    9/16"1 3/16"1"3 3/8"35°1,5001,900365 in·lbf @ 300 rpm235 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-U-20625 Class C2457K16000000
    5/8"1 7/32"1 1/8"3 1/2"35°1,5002,200Not RatedNot RatedPin and BlockRoundBall-Spring Oil FittingMIL-U-20625 Class C2457K36000000
    3/4"1 1/4"1 1/4"3 3/4"35°1,5003,600690 in·lbf @ 300 rpm450 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-U-20625 Class C2457K17000000
    7/8"1 5/16"1 1/2"4 1/4"35°1,5007,2001,385 in·lbf @ 300 rpm900 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-U-20625 Class C2457K18000000
    1"1 9/16"1 3/4"5"35°1,50010,700Not RatedNot RatedPin and BlockRoundBall-Spring Oil FittingMIL-U-20625 Class C2457K37000000
    1 3/16"1 5/8"2"5 7/16"35°1,50015,5002,980 in·lbf @ 300 rpm1,935 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-U-20625 Class C2457K21000000
     

    Quick-Change Adjustable-Length Double U-Joints

    Image of Product. Front orientation. U-Joints. Quick-Change Adjustable-Length Double U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Quick-Change Adjustable-Length Double U-Joints.
    A spring automatically lengthens or shortens these U-joints to fit your application, making them a good choice for assemblies with frequent changes. And since they connect to shafts using the included set screws, there’s no drilling required, unlike U-joints that use spring pins. 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. With a pin-and-block joint, they handle higher torque at lower speeds than other joint types, making them a good choice for most applications. Made of steel, they’re strong and withstand a good amount of torque.
    To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots).
    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
    Keyway
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall Lg.
    Wd.
    Dp.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Parallel Misalignment
    Capability
    Joint Type
    For Shaft
    Type
    Each
    Steel
    3/8"15/16"3/4"11 1/4" to 14 1/4"3/32"3/64"35°1,000600335 in·lbf @ 300 rpm100 in·lbf @ 300 rpm6.63"Pin and BlockKeyed4125N11000000000
    1/2"1 3/16"1"11 1/4" to 14 1/4"1/8"1/16"35°1,0001,450600 in·lbf @ 300 rpm180 in·lbf @ 300 rpm6.24"Pin and BlockKeyed4125N1200000000
    5/8"1 1/4"1 1/4"13 1/2" to 16 1/2"3/16"5/64"35°1,0002,800940 in·lbf @ 300 rpm280 in·lbf @ 300 rpm7.31"Pin and BlockKeyed4125N1300000000
    3/4"1 3/8"1 1/2"14 3/4" to 17 3/4"3/16"3/32"35°1,0004,3501,450 in·lbf @ 300 rpm435 in·lbf @ 300 rpm7.74"Pin and BlockKeyed4125N1400000000
    1"1 11/16"2"17 1/2" to 20 1/2"1/4"7/64"35°1,0007,3502,450 in·lbf @ 300 rpm735 in·lbf @ 300 rpm8.6"Pin and BlockKeyed4125N1500000000
     

    Corrosion-Resistant High-Speed Single U-Joints

    Image of Product. Front orientation. U-Joints. Corrosion-Resistant High-Speed Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Corrosion-Resistant High-Speed Single U-Joints.
    Choose these U-joints for applications that run continuously in wet environments. Their needle bearings handle higher speeds and last longer than other types of joints. Made of stainless steel, they balance strength without sacrificing corrosion resistance. Since they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle.
    These U-joints come lubricated, so you don't need to lubricate them during installation. To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots). Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Each
    303 Stainless Steel with Steel Bearings
    3/8"15/16"3/4"2 11/16"35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmNeedle BearingRound2455K720000000
    1/2"1 3/16"1"3 3/8"35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmNeedle BearingRound2455K73000000
    5/8"1 1/4"1 1/4"3 3/4"35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmNeedle BearingRound2455K74000000
    3/4"1 3/8"1 1/2"4 1/4"35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmNeedle BearingRound2455K75000000
    1"1 11/16"2"5 1/2"35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmNeedle BearingRound2455K76000000
    10 mm24 mm19 mm68 mm35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmNeedle BearingRound2455K31000000
    12 mm30 mm25 mm86 mm35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmNeedle BearingRound2455K32000000
    16 mm32 mm32 mm95 mm35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmNeedle BearingRound2455K33000000
    20 mm36 mm38 mm108 mm35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmNeedle BearingRound2455K34000000
    25 mm43 mm51 mm140 mm35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmNeedle BearingRound2455K35000000
     

    Extreme-Angle Geared Single U-Joints

    Image of Product. Front orientation. U-Joints. Extreme-Angle Geared Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Extreme-Angle Geared Single U-Joints.
    The gears on these U-joints transmit rotary motion between shafts that are misaligned at angles up to 136°, the widest angle of all our U-joints. Use them in hand-powered, low-speed applications. Drill holes through the U-joint and your shafts and then connect using spring pins.
    For
    Shaft
    Overall
    Dia.
    Dp.
    Joint
    Dia.
    Ht.
    Lg.
    Max. Operating
    Angle
    Speed
    Ratio
    Max. Rotation
    Speed
    Max.
    Torque
    Joint
    Type
    For Shaft
    Type
    Each
    Steel
    7/16"1 1/8"3/4"2 3/4"10 1/4"136°1:1Not RatedNot RatedGearedRound6450K10000000
    1/2"1 1/8"3/4"2 3/4"10 1/4"136°1:1Not RatedNot RatedGearedRound6450K2000000
    9/16"1 1/8"3/4"2 3/4"10 1/4"136°1:1Not RatedNot RatedGearedRound6450K3000000
     

    Machinable-Bore Single U-Joints

    Image of Product. Front orientation. U-Joints. Machinable-Bore Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Machinable-Bore Single U-Joints.
    Customize the bores of these U-joints to fit the exact dimensions of your shafts. To make drilling easy, they come apart and have a small, centered starter hole on each end. They’re single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. A good choice for most applications, all have a pin-and-block joint that handles higher torque at lower speeds than other joint types, such as those with needle bearings. Made of steel, they’re strong and handle a good amount of torque.
    To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots). Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Torque
    For Max.
    Shaft Dia.
    For Max.
    Shaft Dp.
    Joint
    Dia.
    Overall
    Lg.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Each
    Steel
    3/8"5/8"1/2"2"25°1,750375150 in·lbf @ 300 rpm51 in·lbf @ 300 rpmPin and BlockRound6443K12000000
    1/2"11/16"5/8"2 1/4"25°1,750540245 in·lbf @ 300 rpm83 in·lbf @ 300 rpmPin and BlockRound6443K4200000
    5/8"7/8"3/4"2 11/16"25°1,750765330 in·lbf @ 300 rpm110 in·lbf @ 300 rpmPin and BlockRound6443K1300000
     

    Mil. Spec. Machinable-Bore Single U-Joints

    Image of Product. Front orientation. U-Joints. Mil. Spec. Machinable-Bore Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Mil. Spec. Machinable-Bore Single U-Joints.
    Drill the bores to create custom U-joints that meet strict military standards for material and construction. These U-joints come apart and have a small, centered starter hole on each end to make drilling easy. Because they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. Made of steel with hardened yoke ears for added strength and durability, they handle a good amount of torque.
    Drill holes through the U-joint and your shafts and then connect using spring pins. They have a ball-spring oil fitting to keep lubricant in the joint.
    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.
    Torque
    For Max.
    Shaft Dia.
    For Max.
    Shaft Dp.
    Joint
    Dia.
    Overall
    Lg.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Includes
    Mil. Spec.
    Each
    Steel
    1/2"1"7/8"3"35°1,5001,800345 in·lbf @ 300 rpm225 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K150000000
    9/16"1 3/16"1"3 3/8"35°1,5003,050585 in·lbf @ 300 rpm380 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K16000000
    3/4"1 1/4"1 1/4"3 3/4"35°1,5005,5001,055 in·lbf @ 300 rpm685 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K17000000
    7/8"1 5/16"1 1/2"4 1/4"35°1,5009,0001,730 in·lbf @ 300 rpm1,125 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K18000000
    1"1 9/16"1 3/4"5"35°1,50014,0002,690 in·lbf @ 300 rpm1,750 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K19000000
    1 3/16"1 5/8"2"5 7/16"35°1,50022,0004,230 in·lbf @ 300 rpm2,750 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K21000000
    1 1/2"2 1/16"2 1/2"7"35°1,50032,0006,150 in·lbf @ 300 rpm4,000 in·lbf @ 300 rpmPin and BlockRoundBall-Spring Oil FittingMIL-DTL-20625 Class A2456K22000000
     

    Corrosion-Resistant Sealed Single U-Joints

    Image of Product. Front orientation. U-Joints. Corrosion-Resistant Sealed Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Corrosion-Resistant Sealed Single U-Joints.
    Ideal for wet environments, these U-Joints are stainless steel, so they have good corrosion resistance while also balancing strength. They have a heat- and water-resistant silicone cover (also known as a boot or bellows) to keep lubricant in and contaminants out. Since they come lubricated, you don’t need to lubricate them during installation. They're single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. A good choice for operations that run continuously, they work at higher speeds and last longer than other types of joints, thanks to their needle bearings.
    Connect these U-joints 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
    Keyway
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall
    Lg.
    OD
    Wd.
    Dp.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Bellows
    Material
    Joint Type
    For Shaft
    Type
    Each
    303 Stainless Steel with Steel Bearings
    3/8"15/16"3/4"2 11/16"1 3/8"3/32"3/64"35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K220000000
    1/2"1 3/16"1"3 3/8"1 1/2"1/8"1/16"35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K23000000
    5/8"1 1/4"1 1/4"3 3/4"1 7/8"3/16"3/32"35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K24000000
    3/4"1 3/8"1 1/2"4 1/4"2 1/4"3/16"3/32"35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K25000000
    1"1 11/16"2"5 1/2"2 11/16"1/4"1/8"35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K26000000
    10 mm24 mm19 mm68 mm35 mm3 mm11 mm35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K36000000
    20 mm36 mm38 mm108 mm57 mm6 mm23 mm35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K39000000
    25 mm43 mm51 mm140 mm68 mm8 mm28 mm35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed2455K41000000
     

    High-Speed Single U-Joints

    Image of Product. Front orientation. U-Joints. High-Speed Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. High-Speed Single U-Joints.
    Often found in continuously running applications, these U-joints operate at higher speeds and last longer than other types of joints, thanks to their needle bearings. They’re single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. Made of steel, they are strong and handle a good amount of torque.
    These U-joints come lubricated, so you don't need to lubricate them during installation. To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots). Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Joint Type
    For Shaft
    Type
    Each
    Steel with Steel Bearings
    3/8"15/16"3/4"2 11/16"35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmNeedle BearingRound8284K720000000
    1/2"1 3/16"1"3 3/8"35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmNeedle BearingRound8284K73000000
    5/8"1 1/4"1 1/4"3 3/4"35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmNeedle BearingRound8284K74000000
    Single U-Joint, High-Speed, for 5/8" Diameter x 1-1/4" Deep Shaft
    EachIn stock
    3/4"1 3/8"1 1/2"4 1/4"35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmNeedle BearingRound8284K75000000
    1"1 11/16"2"5 1/2"35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmNeedle BearingRound8284K76000000
     

    Machinable-Bore Double U-Joints

    Image of Product. Front orientation. U-Joints. Machinable-Bore Double U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Machinable-Bore Double U-Joints.
    Drill custom bore sizes to connect shafts that are either parallel to each other or are misaligned at an angle. These double U-joints come apart and have a small, centered hole on each end to make drilling easy. Besides transferring torque, they keep parallel shafts moving in sync by making the output shaft move at the same rate as the input shaft. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. Made of steel, they’re strong and handle a good amount of torque.
    To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots). Drill holes through the U-joint and your shafts and then connect using spring pins.
    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.
    Torque
    For Max.
    Shaft Dia.
    For Max.
    Shaft Dp.
    Joint
    Dia.
    Overall
    Lg.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Parallel Misalignment
    Capability
    Joint Type
    For Shaft
    Type
    Each
    Steel
    3/8"5/8"1/2"4"25°1,750375150 in·lbf @ 300 rpm51 in·lbf @ 300 rpm0.845"Pin and BlockRound6443K150000000
    1/2"11/16"5/8"4 1/2"25°1,750540245 in·lbf @ 300 rpm83 in·lbf @ 300 rpm0.951"Pin and BlockRound6443K52000000
    5/8"7/8"3/4"5 3/8"25°1,750765330 in·lbf @ 300 rpm110 in·lbf @ 300 rpm1.133"Pin and BlockRound6443K63000000
    3/4"1"1"6 3/4"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpm1.428"Pin and BlockRound6443K55000000
    1"1 1/16"1 1/4"7 1/2"25°1,7505,220980 in·lbf @ 300 rpm330 in·lbf @ 300 rpm1.585"Pin and BlockRound6443K29000000
    1 1/8"1 3/16"1 1/2"8 1/2"25°1,7507,9201,425 in·lbf @ 300 rpm480 in·lbf @ 300 rpm1.796"Pin and BlockRound6443K38000000
     

    Sanitary Sealed Single U-Joints

    Image of Product. Front orientation. U-Joints. Sanitary Sealed Single U-Joints.
    Image of Attribute. Front orientation. Contains Annotated. Sanitary Sealed Single U-Joints.
    Image of Product. Front orientation. Joint Covers. Sanitary Sealed Single U-Joints.

    Replacement Covers

    Often found in food, cosmetic, and pharmaceutical plants, these U-joints connect misaligned shafts in sanitary environments. Their stainless steel body won't corrode from frequent washdowns with harsh chemicals and is highly polished, so there's no crevices for bacteria to grow. Their lubricant is NSF registered H1 for incidental contact with food. A heat- and water-resistant silicone cover (sometimes called a boot or bellows) seals this lubricant in and keeps out contaminants.
    They’re single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. A good choice for applications that run continuously, they operate at higher speeds and last longer than other types of joints, thanks to their needle bearings. Since they come lubricated, 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.
    FDA Compliant 21 CFR 177.2600—FDA-compliant U-joints have a cover that is safe for direct contact with food.
    U-Joints
    Replacement
    Covers
    For
    Shaft
    Keyway
    Torque
    Dia.
    Dp.
    Joint
    Dia.
    Overall
    Lg.
    OD
    Wd.
    Dp.
    Max. Operating
    Angle
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    3° Operating Angle
    10° Operating Angle
    Bellows
    Material
    Joint Type
    For Shaft
    Type
    Each
    Each
    316 Stainless Steel with Steel Bearings
     
    FDA Compliant 21 CFR 177.2600 U-Joints
    3/8"15/16"3/4"2 11/16"1 3/8"3/32"3/64"35°6,0009528 in·lbf @ 1,000 rpm19 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed7376N1100000007376N16000000
    1/2"1 3/16"1"3 3/8"1 1/2"1/8"1/16"35°6,000215110 in·lbf @ 1,000 rpm77 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed7376N120000007376N1700000
    5/8"1 1/4"1 1/4"3 3/4"1 7/8"3/16"3/32"35°6,000700275 in·lbf @ 1,000 rpm185 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed7376N130000007376N1800000
     
    U-Joints
    3/4"1 3/8"1 1/2"4 1/4"2 1/4"3/16"3/32"35°6,0001,780545 in·lbf @ 1,000 rpm370 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed7376N140000007376N1900000
    1"1 11/16"2"5 1/2"2 11/16"1/4"1/8"35°6,0004,3001,050 in·lbf @ 1,000 rpm705 in·lbf @ 1,000 rpmSilicone Rubber
    Needle BearingKeyed7376N15000000007376N21000000
     
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