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    70 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
    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
     
    Iron Hubs
    4 1/2"3 3/4"KeyedForward/Reverse, Start/Stop1 7/8"6408K1900000005,0001,2400.015"-40 to 212Buna-N
    6408K810000003,6003,7050.015"0.5°-55 to 245Hytrel6408K9800000003,6001,8600.015"-30 to 160Polyurethane Rubber
    2410K190000000
    4 7/8"4 1/2"KeyedForward/Reverse, Start/Stop1 7/8"6408K210000005,0001,7250.015"-40 to 212Buna-N
    6408K82000005,0004,6800.015"0.5°-55 to 245Hytrel6408K99000000———0
    5 11/32"5"KeyedForward/Reverse, Start/Stop1 7/8"6408K220000004,2002,3400.015"-40 to 212Buna-N
    6408K62000004,2006,2250.015"0.5°-55 to 245Hytrel6408K64000000———0
     

    High-Speed Vibration-Damping Flexible Shaft Couplings

    Image of System. Front orientation. Contains Annotated. Flexible Shaft Couplings. High-Speed Vibration-Damping Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Exploded view. Contains Annotated, MultipleImages. Flexible Shaft Couplings. High-Speed Vibration-Damping Flexible Shaft Couplings.

    (Each Component Sold

    Separately)

    Use these gear-shaped couplings for high-speed and high-torque applications. A rubber center allows flexing so couplings can take on multiple types of misalignment while damping vibration and shock. With no metal-to-metal contact, there’s no need for lubrication. Fasten to your shafts by tightening the set screws, which bite into the shaft to hold it.
    A complete coupling consists of two hubs and one center (each component sold separately).
    Hubs have a keyway, except hubs for 1⁄4" and 3⁄8" shaft dia. do not have a keyway.
    Hubs
    Shaft Coupling Centers
    Misalignment Capability
    Overall
    Lg.
    OD
    For Rotary
    Motion
    For Shaft
    Dia.
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    Axial
    Temp. Range,
    ° F
    Material
    Each
    Cast Iron Hubs
    3 15/16"4 5/8"Continuous1 7/8"6507K50000005,2507250.02"0.125"-30 to 275TPE
    6507K74000000
    4 7/16"5 29/64"Continuous1 7/8"6507K12000004,5001,1350.02"0.125"-30 to 275TPE
    6507K7500000
    5 1/16"6 23/64"Continuous1 7/8"6507K70000003,7501,8000.025"0.125"-30 to 275TPE
    6507K7600000
    5 11/16"7 1/2"Continuous1 7/8"6507K80000003,6002,8750.025"0.125"-30 to 275TPE
    6507K77000000
    7 1/8"8 5/8"Continuous1 7/8"6507K90000003,6004,5300.032"0.125"-30 to 275EPDM
    6507K78000000
     

    High-Torque Set Screw Flexible Shaft Couplings

    Image of System. Front orientation. Contains Annotated, MultipleImages. Flexible Shaft Couplings. High-Torque Set Screw Flexible Shaft Couplings.
    Image of System. Front orientation. Contains Annotated, MultipleImages. Flexible Shaft Couplings. High-Torque Set Screw Flexible Shaft Couplings.
    The thick split spider on these couplings takes on twice as much torque as standard split spiders, while a set screw holds the hubs in place on your shaft. Also known as jaw couplings, use them to connect motors to pumps, mixers, and other high-torque equipment. You don’t need to lubricate them.
    For a complete coupling, you’ll need two hubs, one split spider, and a split spider cover (all sold separately).
    Hubs attach to the end of your shaft.
    Split spiders cushion between the two hubs to dampen vibration, reduce shocks, and handle shaft misalignment, extending the life of bearings, seals, and motors. You can replace them without having to remove the hubs or move your shaft and equipment around, which reduces the risk of needing to realign the shaft.
    Split spider covers hold the spider in place.
    Hubs
    Steel Split
    Spider Covers
    Overall
    Lg.
    OD
    For Shaft
    Type
    For Rotary Motion
    For Shaft
    Dia.
    Each
    Each
     
    Steel Hubs, Split Spiders
    6 1/16"3 33/64"KeyedForward/Reverse, Start/Stop1 7/8"3565N900000003565N640000000
     
    Urethane Split Spiders

    High-Torque Flexible Shaft Couplings

    Image of System. Front orientation. Contains Annotated. Flexible Shaft Couplings. High-Torque Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Exploded view. Contains Annotated, MultipleImages. Flexible Shaft Couplings. High-Torque Flexible Shaft Couplings.

    (Each Component Sold Separately)

    With a rugged roller-chain design, these couplings provide excellent torque and angular misalignment capacities. Lubrication is required. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.
    A complete coupling consists of two hubs and one roller chain (each component sold separately). Complete couplings meet ANSI B29.23M-1995.
    Optional covers retain grease lubrication and provide protection from abrasion and corrosion.
    Hubs
    Steel Roller Chain
    Orange
    Nylon Covers
    Misalignment Capability
    Roller Chain
    Overall
    Lg.
    OD
    OD with
    Cover
    For Shaft
    Type
    For Rotary
    Motion
    For Shaft
    Dia.
    Each
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Parallel
    Angular
    No.
    Standard
    Each
    Each
     
    Steel Hubs
    3 29/64"5"6 3/8"KeyedContinuous1 7/8"6407K440000003,00010,9000.012"1.5°60-2ANSI6407K540000006407K740000000
     

    Shock-Absorbing Flexible Shaft Couplings

    Image of Product. Components of a Coupling Shown Assembled. Front orientation. Contains Annotated. Flexible Shaft Couplings. Shock-Absorbing Flexible Shaft Couplings.
    Image of Product. (Each Component Sold Separately). Front orientation. Contains Annotated. Flexible Shaft Couplings. Shock-Absorbing Flexible Shaft Couplings.

    Components of a

    Coupling Shown Assembled

    (Each Component Sold

    Separately)

    A strip of flexible spring steel wraps around the teeth of both hubs to absorb sharp, momentary load increases that can come from motor startups, emergency braking, or sudden impact with hard objects. When the shock load hits, the strip of spring steel (known as a grid) flexes to spread out the load. After the load passes, the grid straightens back out. They're commonly found in wire drawing and cutting machines, pulverizers, and mixers. Compared to spider couplings, jaw couplings, and other flexible shaft couplings, these handle higher torque while taking up less space. All have keyed bores to work with keyed shafts, which transmit higher torque with less slippage than round shafts.
    A complete coupling consists of two hubs as well as a grid and cover assembly (all sold separately). The grid and cover assembly includes a spring steel grid, aluminum cover, rubber seals, and grease for lubrication. When ordering, please choose components that have the same manufacturer series number, otherwise the grid will not fit.
    Hubs
    Grid and Cover Assemblies
    Replacement
    Grids
    Replacement
    Seals
    Misalignment Capability
    Overall
    Lg.
    OD
    For Rotary Motion
    Manufacturer
    Series
    For Shaft
    Dia.
    Each
    Parallel
    Angular
    Max. Rotation
    Speed, rpm
    Max. Torque,
    in·lbf
    Each
    Each
    Each
    Black-Oxide Steel
     
    For Keyed Shafts
    4 7/8"3 19/32"Continuous, Forward/Reverse, Start/StopMartin (1050T)1 7/8"3395N400000000.016"0.25°4,5003,8503395N12300000003395N11400000003395N132000000
    5 1/8"4 3/32"Continuous, Forward/Reverse, Start/StopMartin (1060T)1 7/8"3395N50000000.016"0.25°4,3506,0503395N1240000003395N1150000003395N13300000
     
    Grease

    Ultra-High-Torque Flexible Shaft Couplings

    Image of System. Components of a Coupling Shown Assembled. Front orientation. Contains Annotated. Flexible Shaft Couplings. Ultra-High-Torque Flexible Shaft Couplings.
    Image of System. (Each Component Sold Separately). Front orientation. Exploded view. Contains Annotated, MultipleImages. Flexible Shaft Couplings. Ultra-High-Torque Flexible Shaft Couplings.

    Components of a

    Coupling Shown

    Assembled

    (Each Component Sold Separately)

    With a rigid gear design, these steel couplings transmit more torque than other couplings of the same size. Lubrication is required. To install, heat the hubs to expand them slightly and fit them onto the shaft. When they cool, hubs shrink to fit the shaft tightly.
    A complete coupling consists of two hubs, one sleeve, and one seal kit (each component sold separately).
    Hubs
    Steel Sleeves
    Seal Kits
    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
    Axial
    Each
    Includes
    Each
     
    Steel Hubs
    4 1/4"4 3/4"KeyedContinuous1 7/8"6454K1500000004,20020,2000.007"0.03"6454K250000000Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings6454K35000000
    4 3/4"5 1/2"KeyedContinuous1 7/8"6454K170000003,75030,2000.007"0.05"6454K27000000Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings6454K37000000
     

    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.
    Chrome-Plated Carbon Steel—Resist moisture and mild cleaning solutions better than zinc-plated collars.
    Carbon Steel—Strong and easy to machine. Use in dry environments, since moisture will cause steel to rust.
    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
    1 7/8"3"11/16"Socket Head26436K260000001/2"7/32"3357K41000000
     
    Zinc-Plated Carbon Steel
    1 7/8"2 7/8"11/16"Socket Head22380K4200000———0
     
    Chrome-Plated Carbon Steel
    1 7/8"3"11/16"Socket Head23370K8400000———0
     
    Carbon Steel
    1 7/8"3"11/16"Socket Head29739T56400000———0
     
    303 Stainless Steel
    1 7/8"3"11/16"Socket Head26436K10200000———0
     
    316 Stainless Steel
    1 7/8"3"11/16"Socket Head29633T35000000———0
     
    Aluminum
    1 7/8"3"11/16"Socket Head26436K15400000———0
     

    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
    1 7/8"3 1/2"3/4"Socket Head19951K51000000
     

    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
    1 7/8"3 1/2"3/4"Socket Head28386K51000000
     

    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
    1 7/8"2 3/4"7/8"Hex Socket160475K85000000000000
     

    Quick-Release Shaft Collars with Lever

    Image of ProductInUse. Front orientation. Contains Annotated. Shaft Collars. Quick-Release Shaft Collars with Lever.
    Flip the lever to install, reposition, and remove these collars. They clamp firmly and evenly without marring your shaft.
    Black Anodized Aluminum—One-third the weight of steel and more corrosion resistant than unfinished aluminum.
    Clamping
    Screw
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Black Anodized Aluminum
    1 7/8"4"3/4"Socket Head11511K2450000000
     

    Set Screw Two-Piece Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Set Screw Two-Piece Shaft Collars.
    Attach these traditional collars anywhere along a shaft when other components are already installed or you can't access the ends. Their set screw digs into the shaft for a tight, permanent 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.
    Set
    Screw
    Clamping
    Screw
    Each
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Type
    No.
    Included
    1-24
    25-Up
    Black-Oxide Carbon Steel
    1 7/8"3"11/16"Hex Socket1Socket Head21069N73000000000000
     

    Plastic Two-Piece Shaft Collars

    Image of Product. Front orientation. Shaft Collars. Plastic Two-Piece Shaft Collars.
    Lightweight alternatives to metal two-piece collars for weight-sensitive applications. Attach these collars anywhere along a shaft when other components are already installed or you can't access the ends. They clamp firmly and evenly without marring the shaft, so you can reposition or remove them later.
    Acetal—Resist swelling when exposed to moisture.
    Nylon—Will swell and weaken when exposed to moisture, so they're best for dry environments.
    Clamping
    Screw
    For Shaft
    Dia.
    OD
    Wd.
    Type
    No.
    Included
    Each
    Nylon
    1 7/8"3 1/4"15/16"Socket Head260485K78000000
     
    Acetal
    1 7/8"3 1/4"15/16"Socket Head29708T2700000
     

    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 SDS
    1 3/8"1/2"1/16"108Sintered Cast IronClamping Screws, Machine Key1 7/8"6086K853000000
     
    Bushing Trade Number SK
    1 15/16"1/2"1/4"180Sintered SteelClamping Screws1 7/8"6086K52800000
     

    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
    1 7/8"2 3/4"7/8"Hex Socket19414T35000000
     
    Zinc-Plated Carbon Steel
    1 7/8"2 3/4"7/8"Hex Socket16432K5100000
     
    303 Stainless Steel
    1 7/8"2 3/4"7/8"Hex Socket16462K5100000
     
    316 Stainless Steel
    1 7/8"2 3/4"7/8"Hex Socket19943K4500000
     
    Aluminum
    1 7/8"2 3/4"7/8"Hex Socket19946K900000
     

    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
    1 7/8"2 7/8"11/16"Socket Head16435K26000000
     
    Zinc-Plated Carbon Steel
    1 7/8"2 7/8"11/16"Socket Head19961K4200000
     
    303 Stainless Steel
    1 7/8"2 7/8"11/16"Socket Head16435K8200000
     
    316 Stainless Steel
    1 7/8"3"11/16"Socket Head19421T3200000
     
    Aluminum
    1 7/8"3"11/16"Socket Head16157K4300000
     
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