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    52 Products

    Set Screw Flexible Shaft Couplings

    Image of System. Hubs, Split Spider, and Retaining Ring Shown Assembled. Front orientation. Contains Annotated. Flexible Shaft Couplings. Set Screw Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Contains Annotated. Flexible Shaft Couplings. Set Screw Flexible Shaft Couplings.

    Hubs, Split Spider, and

    Retaining Ring Shown

    Assembled

    (Each Component Sold

    Separately)

    Image of System. Hubs and Spider Shown Assembled. Front orientation. Contains Annotated. Flexible Shaft Couplings. Set Screw Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Exploded view. Contains Annotated. Flexible Shaft Couplings. Set Screw Flexible Shaft Couplings.

    Hubs and Spider Shown

    Assembled

    (Each Component Sold

    Separately)

    Each hub includes a set screw (unless noted), which bites into your shaft to hold the coupling in place. 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, or two hubs, one split spider, and one retaining ring (all components sold separately). Split spiders are easier to install and replace than standard spiders because there’s no need for tools or removing your hubs. Twist-lock them in place using a retaining ring.
    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 and split spiders provide fair vibration damping and good chemical resistance.
    Hubs
    Buna-N Spiders
    Hytrel Spiders
    Polyurethane Spiders
    Polyurethane Split Spiders
    347 Stainless Steel
    Retaining Rings
    Misalignment Capability
    Misalignment Capability
    Misalignment Capability
    Misalignment Capability
    Overall
    Lg.
    OD
    For Shaft
    Type
    For Rotary Motion
    For Shaft
    Dia.
    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
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Temp. Range,
    ° F
    Spider Material
    Each
    Each
     
    Iron Hubs
    1 23/32"1 5/64"KeyedForward/Reverse, Start/Stop9/16"6408K110000018,000260.015"-40 to 212Buna-N
    6408K840000018,000500.015"0.5°-55 to 245Hytrel6408K91000000———0———0———0
    1 63/64"1 23/64"KeyedForward/Reverse, Start/Stop9/16"6408K120000014,000430.015"-40 to 212Buna-N
    6408K7300003,6001100.015"0.5°-55 to 245Hytrel6408K9300000———0———0———0
    2 1/8"1 3/4"KeyedForward/Reverse, Start/Stop9/16"6408K130000011,000900.015"-40 to 212Buna-N
    6408K74000003,6002250.015"0.5°-55 to 245Hytrel6408K94000003,6001350.015"-30 to 160Polyurethane Rubber
    2410K11000000———0———0
    2 5/32"2 7/64"KeyedForward/Reverse, Start/Stop9/16"6408K14000009,0001400.015"-40 to 212Buna-N
    6408K75000003,6004000.015"0.5°-55 to 245Hytrel6408K95000003,6002100.015"-30 to 160Polyurethane Rubber
    2410K13000009,2006700.03"-30 to 200Polyurethane Rubber
    2393K330000002393K23000000
    2 1/2"2 7/64"KeyedForward/Reverse, Start/Stop9/16"6408K15000009,0001400.015"-40 to 212Buna-N
    6408K75000003,6004000.015"0.5°-55 to 245Hytrel6408K95000003,6002100.015"-30 to 160Polyurethane Rubber
    2410K13000009,2006700.03"-30 to 200Polyurethane Rubber
    2393K33000002393K2300000
    2 27/32"2 35/64"KeyedForward/Reverse, Start/Stop9/16"6408K16000007,0003150.015"-40 to 212Buna-N
    6408K77000003,6007900.015"0.5°-55 to 245Hytrel6408K960000003,6004750.015"-30 to 160Polyurethane Rubber
    2410K15000007,7001,1100.03"-30 to 200Polyurethane Rubber
    2393K340000002393K2400000
    3 31/64"2 35/64"KeyedForward/Reverse, Start/Stop9/16"6408K17000007,0003150.015"-40 to 212Buna-N
    6408K77000003,6007900.015"0.5°-55 to 245Hytrel6408K960000003,6004750.015"-30 to 160Polyurethane Rubber
    2410K15000007,7001,1100.03"-30 to 200Polyurethane Rubber
    2393K340000002393K2400000
     

    Shaft Collars

    Image of Product. Front orientation. Shaft Collars.
    Slide these collars from one end of your shaft and tighten the clamping screw. They grip firmly and evenly without marring the shaft, so you can reposition or remove them later.
    Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
    Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.
    303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.
    316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.
    Aluminum—One-third the weight of steel and corrosion resistant.
    Clamping
    Screw
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Black-Oxide Carbon Steel
    9/16"1 5/16"7/16"Socket Head16435K5400000
     
    Zinc-Plated Carbon Steel
    9/16"1 5/16"7/16"Socket Head19961K180000
     
    303 Stainless Steel
    9/16"1 5/16"7/16"Socket Head16435K6400000
     
    316 Stainless Steel
    9/16"1 5/16"7/16"Socket Head19421T800000
     
    Aluminum
    9/16"1 5/16"7/16"Socket Head16157K340000
     

    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
    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 A2456K160000000
     

    Single U-Joints

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

    Pin-and-Block Joint

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

    Pin-and-Block 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).
    Steel—Steel U-joints are strong and handle more torque than zinc alloy 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.
    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
    Shaft Mount
    Type
    Spring Pins
    Included
    Each
    Pin-and-Block Joint
     
    Steel—For Keyed Shafts
    9/16"1"1"3 3/8"25°1,7501,560595 in·lbf @ 300 rpm200 in·lbf @ 300 rpmSet Screw8285K110000000
     
    Steel—For Round Shafts
    9/16"1"1 1/8"3 1/2"25°1,7502,880785 in·lbf @ 300 rpm260 in·lbf @ 300 rpmSpring PinNo6443K39000000
     

    Two-Piece Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Two Piece, For Round Shafts.

    For Round Shafts

    Image of Product. Front orientation. Shaft Collars. Two Piece, For Keyed Shafts.

    For Keyed Shafts

    Attach these collars anywhere along your shaft, which helps when other components are already installed or you can't access the end. They clamp firmly and evenly without marring the shaft, so you can reposition or remove collars later.
    Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
    Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.
    303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.
    316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.
    Aluminum—One-third the weight of steel and corrosion resistant.
    For Round Shafts
    For Keyed Shafts
    Clamping
    Screw
    Keyway
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Wd.
    Dp.
    Each
    Black-Oxide Carbon Steel
    9/16"1 5/16"7/16"Socket Head26436K530000001/8"1/16"3357K23000000
     
    Zinc-Plated Carbon Steel
    9/16"1 5/16"7/16"Socket Head22380K1800000———0
     
    303 Stainless Steel
    9/16"1 5/16"7/16"Socket Head26436K6300000———0
     
    316 Stainless Steel
    9/16"1 5/16"7/16"Socket Head29633T1200000———0
     
    Aluminum
    9/16"1 5/16"7/16"Socket Head26436K13500000———0
     

    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
    9/16"1 1/8"3/4"2 3/4"10 1/4"136°1:1Not RatedNot RatedGearedRound6450K30000000
     

    Face-Mount Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Face-Mount Shaft Collars.
    Mount components into the tapped holes on the face of these collars. They slide from one end of a shaft and clamp firmly and evenly to prevent marring, so you can reposition or remove them later.
    Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
    303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.
    Clamping
    Screw
    Mounting
    Holes
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Mounting Fasteners
    Included
    Thread
    Size
    No.
    of
    Each
    Black-Oxide Carbon Steel
    9/16"1 5/16"7/16"Socket Head1No10-24
    29677T22000000
     
    303 Stainless Steel
    9/16"1 5/16"7/16"Socket Head1No10-24
    25631T1200000
     

    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
    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 C2457K160000000
     

    Oversized Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Oversized Shaft Collars.
    Wider and thicker with a larger clamping screw, these shaft collars deliver a stronger grip than standard collars. Slide them from one end of your shaft and tighten the screw. They clamp firmly and evenly without marring the shaft, so you can reposition or remove them later.
    Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
    Clamping
    Screw
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Black-Oxide Carbon Steel
    9/16"1 1/2"1/2"Socket Head19951K36000000
     

    Oversized Two-Piece Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Oversized Two-Piece Shaft Collars, For Round Shafts.

    For Round Shafts

    Wider and thicker with larger clamping screws, these deliver a more powerful hold than standard two-piece collars. Attach them anywhere along a shaft when other components are already installed or you can't access the ends. They grip evenly without marring the shaft, so you can reposition or remove them later.
    Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
    Clamping
    Screw
    For Round Shafts
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Black-Oxide Carbon Steel
    9/16"1 1/2"1/2"Socket Head28386K36000000
     

    Plastic Set Screw Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Plastic Set Screw Shaft Collars.
    Lightweight alternatives to traditional metal collars for weight-sensitive applications. The set screw digs into shafts for a secure hold, but one that leaves a gouge.
    Nylon—Will swell and weaken when exposed to moisture, so they're best for dry environments.
    Set
    Screw
    Each
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    1-19
    20-Up
    Nylon
    9/16"1 1/8"1/2"Hex Socket160475K690000000000
     

    Quick-Disconnect (QD) Bushings

    Image of Product. Front orientation. Pulley and Sprocket Bushings. Quick-Disconnect (QD) Bushings, Clamp-On Shaft Mount.
    Image of Attribute. Side1 orientation. Contains Annotated. Quick-Disconnect (QD) Bushings.

    Clamp-On Shaft Mount

    The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing trade number. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.
    Keyway
    Overall
    Wd.
    Wd.
    Dp.
    Fastener Tightening
    Torque, in·lbf
    Material
    Includes
    For Shaft
    Dia.
    Each
    Clamp-On Shaft Mount
     
    Bushing Trade Number JA
    1"1/8"1/16"60Sintered SteelClamping Screws9/16"6086K118000000
     
    Bushing Trade Number SDS
    1 3/8"1/8"1/16"108Sintered SteelClamping Screws9/16"6086K13100000
     

    Set Screw Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Set Screw Shaft Collars.
    Slide these traditional collars from one end of the shaft and tighten the set screw. They dig into the shaft for a secure hold, but one that leaves a gouge. For maximum holding power, make sure the set screw is harder than the shaft.
    Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
    Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.
    303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.
    316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.
    Aluminum—One-third the weight of steel and corrosion resistant.
    Set
    Screw
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Black-Oxide Carbon Steel
    9/16"1"7/16"Hex Socket19414T1200000
     
    Zinc-Plated Carbon Steel
    9/16"1"7/16"Hex Socket16432K220000
     
    303 Stainless Steel
    9/16"1"7/16"Hex Socket16462K220000
     
    316 Stainless Steel
    9/16"1"7/16"Hex Socket19943K2200000
     
    Aluminum
    9/16"1"7/16"Hex Socket19946K160000
     
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