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    254 Products

    Friction Torque Limiters

    Use friction to prevent torque overload, control tension, and brake. These torque limiters slip when there’s too much torque while still transmitting the set torque. For example, they could be used in a machine that tightens a bottle cap to a certain torque without overtightening and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance. They have an adjustment ring, so you can set the torque limit by hand without removing them from your shaft. Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.
    Shaft-to-Shaft
    Image of Product. Front orientation. Torque Limiters. Friction Torque Limiters.
    Shaft-to-shaft torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.
    Keyway
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    OD
    Overall
    Lg.
    Wd.
    Dp.
    Drive Direction
    Shaft Mount
    Type
    Each
    For Round Shafts
    1/4"1.6 to 16501"1 1/2"Clockwise and CounterclockwiseSet Screw9132K110000000
    3/8"1.6 to 16501"1 1/2"Clockwise and CounterclockwiseSet Screw9132K13000000
    3/8"2.5 to 25501 3/8"2 1/2"Clockwise and CounterclockwiseSet Screw9132K15000000
    1/2"2.5 to 25501 3/8"2 1/2"Clockwise and CounterclockwiseSet Screw9132K17000000
    1/2"5 to 50501 5/8"2 1/2"Clockwise and CounterclockwiseSet Screw9132K19000000
    1/2"7.5 to 75502 1/4"2 1/2"Clockwise and CounterclockwiseSet Screw9132K23000000
    5/8"5 to 50501 5/8"2 1/2"Clockwise and CounterclockwiseSet Screw9132K21000000
    5/8"7.5 to 75502 1/4"2 1/2"Clockwise and CounterclockwiseSet Screw9132K25000000
     
    For Keyed Shafts
    1/4"1.6 to 16501"1 1/2"1/16"1/32"Clockwise and CounterclockwiseSet Screw9132K51000000
    3/8"2.5 to 25501 3/8"2 1/2"3/32"3/64"Clockwise and CounterclockwiseSet Screw9132K52000000
    1/2"5 to 50501 5/8"2 1/2"1/8"1/16"Clockwise and CounterclockwiseSet Screw9132K54000000
    1/2"7.5 to 75502 1/4"2 1/2"1/8"1/16"Clockwise and CounterclockwiseSet Screw9132K56000000
     
    Through Shaft
    Image of Product. Front orientation. Torque Limiters. Friction Torque Limiters.
    Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
    Keyway
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    OD
    Overall
    Lg.
    Wd.
    Dp.
    Drive Direction
    Shaft Mount
    Type
    Mounting Hole
    Thread Size
    Each
    For Round Shafts
    1/4"1.6 to 16501"1 1/2"Clockwise and CounterclockwiseSet Screw4-40
    9132K310000000
    3/8"1.6 to 16501"1 1/2"Clockwise and CounterclockwiseSet Screw4-40
    9132K32000000
    3/8"2.5 to 25501 3/8"2 1/2"Clockwise and CounterclockwiseSet Screw6-32
    9132K33000000
    1/2"2.5 to 25501 3/8"2 1/2"Clockwise and CounterclockwiseSet Screw6-32
    9132K34000000
    1/2"5 to 50501 5/8"2 1/2"Clockwise and CounterclockwiseSet Screw6-32
    9132K35000000
    1/2"7.5 to 75502 1/4"2 1/2"Clockwise and CounterclockwiseSet Screw8-32
    9132K37000000
    5/8"5 to 50501 5/8"2 1/2"Clockwise and CounterclockwiseSet Screw6-32
    9132K36000000
    5/8"7.5 to 75502 1/4"2 1/2"Clockwise and CounterclockwiseSet Screw8-32
    9132K38000000
     
    For Keyed Shafts
    1/2"5 to 50501 5/8"2 1/2"1/8"1/16"Clockwise and CounterclockwiseSet Screw6-32
    9132K44000000
    1/2"7.5 to 75502 1/4"2 1/2"1/8"1/16"Clockwise and CounterclockwiseSet Screw8-32
    9132K46000000
     

    Chain and Belt Torque Limiters

    Image of Product. Torque Limiter Shown with Sprocket. Front orientation. Chain and Belt Torque Limiters.
    Image of Attribute. Side1 orientation. Contains Annotated.
    Image of Product. Front orientation. Brake and Clutch Friction Lining.

    Torque Limiter

    Shown with

    Sprocket

    Replacement

    Friction Lining

    Prevent damage from overloading. When overloaded, these limiters cause your sprocket or pulley to slip. Once the overload is removed, the limiters automatically reset. Set the torque within the range listed. Friction lining is between the hub and pressure plate.
    Double Spring—Double-spring limiters have a second spring for handling nearly twice the torque of single-spring limiters.
    Sprockets—Sprockets are designed specifically to fit their corresponding limiters. These hubless sprockets are not interchangeable.
    Torque Limiters
    Sprockets
    Replacement
    Friction Lining
    Keyway
    Torque,
    ft·lbf
    For Shaft
    Dia.
    OD
    Overall
    Wd.
    Wd.
    Dp.
    For Max. Sprocket
    or Pulley Wd.
    Friction
    Lining Thk.
    Min.
    Max.
    Hub
    Material
    Each
    Choose a Roller Chain
    Trade Number
    Each
    Each
    Single Spring
    1/4"1 5/16"1 3/8"1/16"1/32"11/32"1/8"16Steel6524K17100000025, 35, 40, 41, 506525K270000006525K68000000
    5/16"1 5/16"1 3/8"3/32"3/64"11/32"1/8"16Steel6524K1720000025, 35, 40, 41, 506525K27000006525K6800000
    3/8"1 5/16"1 3/8"3/32"3/64"11/32"1/8"16Steel6524K1730000025, 35, 40, 41, 506525K27000006525K6800000
    3/8"2 1/4"2"3/32"3/64"1/2"1/8"535Steel6524K11100000035, 40, 41, 506525K11000006525K6200000
    1/2"2 1/4"2"1/8"1/16"1/2"1/8"535Steel6524K1800000035, 40, 41, 506525K11000006525K6200000
    1/2"2 1/2"1 3/4"1/8"1/16"11/32"1/8"2560Steel6524K1210000035, 40, 41, 506525K12000006525K640000
    1/2"3 3/8"2 1/8"1/8"1/16"1/2"1/8"11100Steel6524K13100000035, 40, 41, 506525K13000006525K6300000
    5/8"2 1/4"2"3/16"3/32"1/2"1/8"535Steel6524K1900000035, 40, 41, 506525K11000006525K6200000
    5/8"2 1/2"1 3/4"3/16"3/32"11/32"1/8"2560Steel6524K1220000035, 40, 41, 506525K12000006525K640000
    5/8"3 3/8"2 1/8"3/16"3/32"1/2"1/8"11100Steel6524K2700000035, 40, 41, 506525K13000006525K6300000
    3/4"2 1/4"2"3/16"3/32"1/2"1/8"535Steel6524K2100000035, 40, 41, 506525K11000006525K6200000
    3/4"2 1/2"1 3/4"3/16"3/32"11/32"1/8"2560Steel6524K1230000035, 40, 41, 506525K12000006525K640000
    3/4"3 3/8"2 1/8"3/16"3/32"1/2"1/8"11100Steel6524K2800000035, 40, 41, 506525K13000006525K6300000
    3/4"3 1/2"2 3/16"3/16"3/32"1/2"1/8"50120Steel6524K14100000035, 40, 41, 50, 606525K14000006525K6500000
    3/4"4 1/2"2 7/8"3/16"3/32"7/8"1/8"18190Steel6524K32100000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    7/8"2 1/2"1 3/4"3/16"3/32"11/32"1/8"2560Steel6524K1240000035, 40, 41, 506525K12000006525K640000
    7/8"3 3/8"2 1/8"3/16"3/32"1/2"1/8"11100Steel6524K2900000035, 40, 41, 506525K13000006525K6300000
    7/8"3 1/2"2 3/16"3/16"3/32"1/2"1/8"50120Steel6524K14200000035, 40, 41, 50, 606525K14000006525K6500000
    1"2 1/2"1 3/4"1/4"1/8"11/32"1/8"2560Steel6524K5010000035, 40, 41, 506525K12000006525K640000
    1"3 3/8"2 1/8"1/4"1/8"1/2"1/8"11100Steel6524K3100000035, 40, 41, 506525K13000006525K6300000
    1"3 1/2"2 3/16"1/4"1/8"1/2"1/8"50120Steel6524K14300000035, 40, 41, 50, 606525K14000006525K6500000
    1"4 1/2"2 7/8"1/4"1/8"7/8"1/8"18190Steel6524K32200000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1"5"2 7/8"1/4"1/8"5/8"1/8"90250Steel6524K15100000040, 41, 50, 60, 806525K15000006525K6600000
    1"6"3"1/4"1/8"13/16"1/8"24320Steel6524K12500000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 1/8"4 1/2"2 7/8"1/4"1/8"7/8"1/8"18190Steel6524K32300000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1 1/8"5"2 7/8"1/4"1/8"5/8"1/8"90250Steel6524K15200000040, 41, 50, 60, 806525K15000006525K6600000
    1 3/16"5"2 7/8"1/4"1/8"5/8"1/8"90250Steel6524K15300000040, 41, 50, 60, 806525K15000006525K6600000
    1 1/4"3 1/2"2 3/16"1/4"1/8"1/2"1/8"50120Steel6524K50300000035, 40, 41, 50, 606525K14000006525K6500000
    1 1/4"4 1/2"2 7/8"1/4"1/8"7/8"1/8"18190Steel6524K32400000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1 1/4"5"2 7/8"1/4"1/8"5/8"1/8"90250Steel6524K15400000040, 41, 50, 60, 806525K15000006525K6600000
    1 1/4"6"3"1/4"1/8"13/16"1/8"24320Steel6524K12600000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 3/8"4 1/2"2 7/8"5/16"5/32"7/8"1/8"18190Steel6524K32500000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1 3/8"5"2 7/8"5/16"5/32"5/8"1/8"90250Steel6524K15500000040, 41, 50, 60, 806525K15000006525K6600000
    1 3/8"6"3"5/16"5/32"13/16"1/8"24320Steel6524K12700000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 7/16"5"2 7/8"3/8"3/16"5/8"1/8"90250Steel6524K15600000040, 41, 50, 60, 806525K15000006525K6600000
    1 7/16"6"3"3/8"3/16"13/16"1/8"24320Steel6524K13800000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 1/2"5"2 7/8"3/8"3/16"5/8"1/8"90250Steel6524K15700000040, 41, 50, 60, 806525K15000006525K6600000
    1 1/2"6"3"3/8"3/16"13/16"1/8"24320Steel6524K12800000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 5/8"5"2 7/8"3/8"3/16"5/8"1/8"90250Steel6524K15800000040, 41, 50, 60, 806525K15000006525K6600000
    1 5/8"6"3"3/8"3/16"13/16"1/8"24320Steel6524K12900000040, 41, 50, 60, 80, 1006525K330000006525K7300000
     
    Double Spring
    1/4"1 5/16"1 3/8"1/16"1/32"5/16"1/8"212Steel6524K33100000025, 35, 40, 41, 506525K27000006525K6800000
    5/16"1 5/16"1 3/8"3/32"3/64"5/16"1/8"212Steel6524K33200000025, 35, 40, 41, 506525K27000006525K6800000
    3/8"1 5/16"1 3/8"3/32"3/64"5/16"1/8"212Steel6524K33300000025, 35, 40, 41, 506525K27000006525K6800000
    3/8"2 1/4"2"3/32"3/64"15/32"1/8"750Steel6524K41100000035, 40, 41, 506525K11000006525K6200000
    1/2"2 1/4"2"1/8"1/16"15/32"1/8"750Steel6524K2300000035, 40, 41, 506525K11000006525K6200000
    1/2"2 1/2"1 3/4"1/8"1/16"11/32"1/8"3095Steel6524K42100000035, 40, 41, 506525K12000006525K640000
    1/2"3 3/8"2 1/8"1/8"1/16"7/16"1/8"13175Steel6524K43100000035, 40, 41, 506525K13000006525K6300000
    5/8"2 1/4"2"3/16"3/32"15/32"1/8"750Steel6524K2400000035, 40, 41, 506525K11000006525K6200000
    5/8"2 1/2"1 3/4"3/16"3/32"11/32"1/8"3095Steel6524K42200000035, 40, 41, 506525K12000006525K640000
    5/8"3 3/8"2 1/8"3/16"3/32"7/16"1/8"13175Steel6524K43200000035, 40, 41, 506525K13000006525K6300000
    3/4"2 1/4"2"3/16"3/32"15/32"1/8"750Steel6524K2500000035, 40, 41, 506525K11000006525K6200000
    3/4"2 1/2"1 3/4"3/16"3/32"11/32"1/8"3095Steel6524K42300000035, 40, 41, 506525K12000006525K640000
    3/4"3 3/8"2 1/8"3/16"3/32"7/16"1/8"13175Steel6524K3400000035, 40, 41, 506525K13000006525K6300000
    3/4"3 1/2"2 3/16"3/16"3/32"1/2"1/8"60190Steel6524K44100000035, 40, 41, 50, 606525K14000006525K6500000
    3/4"4 1/2"2 7/8"3/16"3/32"13/16"1/8"20285Steel6524K38100000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    7/8"2 1/2"1 3/4"3/16"3/32"11/32"1/8"3095Steel6524K42400000035, 40, 41, 506525K12000006525K640000
    7/8"3 3/8"2 1/8"3/16"3/32"7/16"1/8"13175Steel6524K43400000035, 40, 41, 506525K13000006525K6300000
    7/8"3 1/2"2 3/16"3/16"3/32"1/2"1/8"60190Steel6524K44200000035, 40, 41, 50, 606525K14000006525K6500000
    1"2 1/2"1 3/4"1/4"1/8"11/32"1/8"3095Steel6524K50200000035, 40, 41, 506525K12000006525K640000
    1"3 3/8"2 1/8"1/4"1/8"7/16"1/8"13175Steel6524K3600000035, 40, 41, 506525K13000006525K6300000
    1"3 1/2"2 3/16"1/4"1/8"1/2"1/8"60190Steel6524K44300000035, 40, 41, 50, 606525K14000006525K6500000
    1"4 1/2"2 7/8"1/4"1/8"13/16"1/8"20285Steel6524K38200000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1"5"2 7/8"1/4"1/8"5/8"1/8"120400Steel6524K45100000040, 41, 50, 60, 806525K15000006525K6600000
    1"6"3"1/4"1/8"3/4"1/8"26440Steel6524K13200000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 1/8"4 1/2"2 7/8"1/4"1/8"13/16"1/8"20285Steel6524K38300000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1 1/8"5"2 7/8"1/4"1/8"5/8"1/8"120400Steel6524K45200000040, 41, 50, 60, 806525K15000006525K6600000
    1 3/16"5"2 7/8"1/4"1/8"5/8"1/8"120400Steel6524K45300000040, 41, 50, 60, 806525K15000006525K6600000
    1 1/4"3 1/2"2 3/16"1/4"1/8"1/2"1/8"60190Steel6524K50400000035, 40, 41, 50, 606525K14000006525K6500000
    1 1/4"4 1/2"2 7/8"1/4"1/8"13/16"1/8"20285Steel6524K38400000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1 1/4"5"2 7/8"1/4"1/8"5/8"1/8"120400Steel6524K45400000040, 41, 50, 60, 806525K15000006525K6600000
    1 1/4"6"3"1/4"1/8"3/4"1/8"26440Steel6524K13300000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 3/8"4 1/2"2 7/8"5/16"5/32"13/16"1/8"20285Steel6524K38500000035, 40, 41, 50, 60, 80, 1006525K32000006525K7200000
    1 3/8"5"2 7/8"5/16"5/32"5/8"1/8"120400Steel6524K45500000040, 41, 50, 60, 806525K15000006525K6600000
    1 3/8"6"3"5/16"5/32"3/4"1/8"26440Steel6524K13400000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 7/16"5"2 7/8"3/8"3/16"5/8"1/8"120400Steel6524K45600000040, 41, 50, 60, 806525K15000006525K6600000
    1 7/16"6"3"3/8"3/16"3/4"1/8"26440Steel6524K13700000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 1/2"5"2 7/8"3/8"3/16"5/8"1/8"120400Steel6524K45700000040, 41, 50, 60, 806525K15000006525K6600000
    1 1/2"6"3"3/8"3/16"3/4"1/8"26440Steel6524K13500000040, 41, 50, 60, 80, 1006525K330000006525K7300000
    1 5/8"5"2 7/8"3/8"3/16"5/8"1/8"120400Steel6524K45800000040, 41, 50, 60, 806525K15000006525K6600000
    1 5/8"6"3"3/8"3/16"3/4"1/8"26440Steel6524K13600000040, 41, 50, 60, 80, 1006525K330000006525K7300000
     
    Replacements for Chain and Belt Torque Limiters

    Noncontact Magnetic Torque Limiters

    Using magnetic force instead of friction to transmit torque, these torque limiters won't wear when they slip. Because there's no wear, they give you accurate, repeatable action. Also known as hysteresis clutches, use them to brake, control tension, and prevent torque overload. They are designed to slip during a torque overload while still transmitting the set torque. For example, you can use them to maintain a constant tension while winding and unwinding wire. All are through-shaft torque limiters, so they regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear. Twist the adjustment ring to set the torque limit, then lock the ring into place with the included set screw.
    Through Shaft
    Image of Product. Front orientation. Torque Limiters. Noncontact Magnetic Torque Limiters , Through Shaft.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    OD
    Overall
    Lg.
    Drive Direction
    Shaft Mount
    Type
    Mounting Hole
    Thread Size
    Choose a Shaft Diameter
    Each
    For Round Shafts
    0.06 to 1.258801 15/16"1 5/8"Clockwise and CounterclockwiseSet ScrewM4 × 0.7 mm1/4"7220K30000000
    0.18 to 53002 3/4"2 7/16"Clockwise and CounterclockwiseSet ScrewM4 × 0.7 mm3/8"7220K4000000
    0.5 to 10.62203 5/16"2 1/2"Clockwise and CounterclockwiseSet ScrewM5 × 0.8 mm3/8", 1/2", 5/8"7220K5000000
    1 to 252504 11/16"3 1/8"Clockwise and CounterclockwiseSet ScrewM5 × 0.8 mm3/8", 1/2", 5/8", 3/4", 7/8", 1"7220K6000000
    2 to 502005 1/4"3 1/8"Clockwise and CounterclockwiseSet ScrewM5 × 0.8 mm3/8", 1/2", 5/8", 3/4", 7/8", 1"7220K7000000
    3 to 702006 5/16"4 1/8"Clockwise and CounterclockwiseSet Screw1/4"-20
    5/8", 3/4", 7/8"7220K800000000
     
    Through Shaft with D-Profile Shaft
    Image of Product. Front orientation. Torque Limiters. Noncontact Magnetic Torque Limiters , Through Shaft with D-Profile Shaft.
    Through-shaft limiters with D-profile shaft let you mount a component directly on the shaft.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    OD
    Overall
    Lg.
    Drive Direction
    Mounting Hole
    Thread Size
    Shaft
    Dia.
    Each
    0.01 to 0.062,0001"1 3/8"Clockwise and CounterclockwiseM3 × 0.5 mm3/16"7220K210000000
    0.01 to 0.131,5001"1 3/8"Clockwise and CounterclockwiseM3 × 0.5 mm3/16"7220K22000000
    0.03 to 0.441,0501 7/16"1 3/4"Clockwise and CounterclockwiseM3 × 0.5 mm5/16"7220K23000000
     

    Overload-Protection Spring-Loaded Torque Limiters

    Image of Product. Front orientation. Torque Limiters. Overload-Protection Spring-Loaded Torque Limiters .
    Protect your machinery if there is a jam, emergency stop, or other overload by cutting off torque between shafts when a maximum torque is reached. These torque limiters automatically resume transmitting torque once it drops below the set maximum. They should not be used in applications that frequently exceed the maximum torque. Since they come factory-set to a maximum torque, there’s no adjustment required and no risk of unintended changes to the torque setting.
    They act as a flexible shaft coupling, so they reduce vibration and protect components from wear by compensating for angular and parallel misalignment. Fasten to your shafts by tightening the set screws, which bite into each shaft to hold it.
    Misalignment
    Capability
    For Shaft
    Dia.
    For Shaft
    Type
    Max. Rotation
    Speed, rpm
    Parallel
    Angular
    OD
    Overall
    Lg.
    Keyway Wd. ×
    Keyway Dp.
    Material
    Center
    Material
    Drive Direction
    Re-Engagement
    Position
    Choose a Maximum Torque, in·lbf
    Each
    1/2"Round1,8000.031"3 1/2"3"6061 Aluminum
    SteelClockwise and CounterclockwiseMultiple25, 50, 75, 100, 1256609K110000000
    5/8"Keyed1,8000.031"3 1/2"3"3/16" × 3/32"6061 Aluminum
    SteelClockwise and CounterclockwiseMultiple25, 50, 75, 100, 1256609K12000000
    3/4"Keyed1,8000.031"3 1/2"3"3/16" × 3/32"6061 Aluminum
    SteelClockwise and CounterclockwiseMultiple25, 50, 75, 100, 1256609K13000000
    7/8"Keyed1,8000.031"3 1/2"3"3/16" × 3/32"6061 Aluminum
    SteelClockwise and CounterclockwiseMultiple25, 50, 75, 100, 1256609K14000000
    1"Keyed1,8000.031"3 1/2"3"1/4" × 1/8"6061 Aluminum
    SteelClockwise and CounterclockwiseMultiple25, 50, 75, 100, 1256609K15000000
    Torque Limiter Sensor Rings

    Precision Overload-Protection Spring-Loaded Torque Limiters

    With zero backlash (no play), there’s no motion lost when these torque limiters transfer torque, so machines move smoothly with accurate and repeatable motion. They protect your machinery if there is a jam, emergency stop, or other overload by cutting off torque when a maximum torque is reached. They automatically resume transmitting torque once it drops below the set maximum. When they resume, they start transmitting torque from the same position where they stopped, keeping your drive and output sides in sync. They should not be used in applications that frequently exceed the set torque. You can adjust the set torque by using a spanner wrench to twist the adjustment ring.
    To help you detect an overload, they have a sensor ring that moves out of place when these limiters cut off torque. Use a sensor (not included) to trigger an alarm or a shutdown when the ring moves.
    They clamp evenly around your shaft for more holding power than set screws and won't damage your shaft.
    Shaft-to-Shaft
    Image of System. Shaft-to-Shaft Torque Limiter, Spider, and Hub Shown Assembled. Front orientation. Contains Annotated. Torque Limiters. Precision Overload-Protection Spring-Loaded Torque Limiters , Shaft-to-Shaft.

    Shaft-to-Shaft Torque

    Limiter, Spider, and

    Hub Shown Assembled

    Image of Product. Front orientation. Torque Limiters. Precision Overload-Protection Spring-Loaded Torque Limiters , Shaft-to-Shaft.
    Image of Product. Front orientation. Flexible Shaft Couplings. Precision Overload-Protection Spring-Loaded Torque Limiters .

    Hubs

    Image of Product. Front orientation. Flexible Shaft Couplings. Precision Overload-Protection Spring-Loaded Torque Limiters .

    Hubs

    Shaft-to-shaft torque limiters also act as a flexible shaft coupling, so they compensate for angular and parallel misalignment as they regulate torque transmission between shafts. This reduces vibration and protects components from wear. For a complete unit, you’ll need a torque limiter, a hub, and a spider (all sold separately).
    Torque Limiters
    Hubs
    Spiders
    Keyway
    Misalignment Capability
    For Shaft
    Dia.
    Torque,
    in·lbf
    OD
    Overall
    Lg.
    Wd.
    Dp.
    Material
    Drive Direction
    Shaft Mount
    Type
    Re-Engagement
    Position
    Features
    Each
    Choose a Shaft Diameter
    Each
    Max. Rotation
    Speed, rpm
    Parallel
    Angular
    Temp. Range,
    ° F
    Each
    For Round Shafts
    1/4"9 to 251 3/8"2"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N1100000001/4", 3/8", 1/2"4404N2500000015,0000.003"0 to 1804404N24000000
    3/8"9 to 251 3/8"2"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N120000001/4", 3/8", 1/2"4404N250000015,0000.003"0 to 1804404N2400000
    3/8"18 to 501 3/4"2 3/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N130000001/4", 3/8", 1/2", 5/8"4404N260000010,0000.011"0 to 1809939T1100000
    1/2"36 to 1001 3/4"2 3/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N140000001/4", 3/8", 1/2", 5/8"4404N260000010,0000.011"0 to 1809939T1100000
     
    For Keyed Shafts
    1/2"90 to 2202 9/16"3 3/8"1/8"1/16"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N150000001/2", 5/8", 3/4"4404N27000009,0000.011"0 to 1809939T1400000
    5/8"90 to 2202 9/16"3 3/8"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N160000001/2", 5/8", 3/4"4404N27000009,0000.011"0 to 1809939T1400000
    5/8"225 to 7052 7/8"3 13/16"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N180000001/2", 5/8", 3/4", 1", 1 1/4"4404N280000008,0000.011"0 to 1809939T1700000
    3/4"90 to 2202 9/16"3 3/8"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N170000001/2", 5/8", 3/4"4404N27000009,0000.011"0 to 1809939T1400000
    3/4"225 to 7052 7/8"3 13/16"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N190000001/2", 5/8", 3/4", 1", 1 1/4"4404N280000008,0000.011"0 to 1809939T1700000
    1"225 to 7052 7/8"3 13/16"1/4"1/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N210000001/2", 5/8", 3/4", 1", 1 1/4"4404N280000008,0000.011"0 to 1809939T1700000
    1"710 to 1,5903 5/8"4 3/16"1/4"1/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N22000000003/4", 1", 1 1/4"4404N290000007,0000.011"0 to 1809939T2100000
    1 1/4"710 to 1,5903 5/8"4 3/16"1/4"1/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N23000000003/4", 1", 1 1/4"4404N290000007,0000.011"0 to 1809939T2100000
     
    Through Shaft
    Image of Product. Front orientation. Torque Limiters. Precision Overload-Protection Spring-Loaded Torque Limiters , Through Shaft.
    Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
    Keyway
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    OD
    Overall
    Lg.
    Wd.
    Dp.
    Material
    Drive Direction
    Shaft Mount
    Type
    Re-Engagement
    Position
    Features
    Each
    For Round Shafts
    1/4"1.8 to 1310,0001 1/4"1 1/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N310000000
    1/4"18 to 399,0001 9/16"1 1/4"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N32000000
    3/8"18 to 399,0001 9/16"1 1/4"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N33000000
    3/8"45 to 1308,0002 3/16"1 9/16"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N35000000
    1/2"36 to 1058,0002"1 9/16"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N34000000
     
    For Keyed Shafts
    1/2"90 to 2656,0002 9/16"2"1/8"1/16"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N36000000
    5/8"90 to 2656,0002 9/16"2"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N37000000
    5/8"180 to 6154,0003 5/8"2 5/16"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N41000000
    3/4"90 to 2656,0002 9/16"2"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N38000000
    3/4"225 to 7056,0002 7/8"2 1/8"3/16"3/32"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N39000000
    1"400 to 1,3254,0003 5/8"2 5/16"1/4"1/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N42000000
    1 1/4"710 to 1,9904,0003 5/8"2 5/16"1/4"1/8"SteelClockwise and CounterclockwiseClamp OnSingleSensor Ring, Zero Backlash4404N43000000
     

    High-Torque Friction Torque Limiters

    With rugged roller chains, these torque limiters handle more torque than other torque limiters. They have a disc that creates friction to prevent torque overload, control tension, and brake. If there’s too much torque, they’ll slip and only transmit the set torque. For example, they could be used in a machine that tightens a bottle cap to a certain torque without overtightening and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance. You can adjust the torque by rotating the hex nut on the hub.
    They act as a flexible shaft coupling, so they reduce vibration and protect components from wear by compensating for angular and parallel misalignment. Fasten them to your shafts by tightening the set screws, which bite into each shaft to hold it.
    Shaft-to-Shaft
    Image of Product. Front orientation. Torque Limiters. High-Torque Friction Torque Limiters.
    Image of Attribute. Front orientation. Contains Annotated. High-Torque Friction Torque Limiters.
    Single Spring—Single-spring torque limiters let you make finer torque adjustments than double-spring torque limiters but can only withstand half as much torque.
    Double Spring—Double-spring torque limiters handle twice as much torque as single-spring torque limiters but are not the best for making precise adjustments at low torques.
    Misalignment
    Capability
    Roller
    Chain
    For Shaft
    Dia.
    For Shaft
    Type
    Torque,
    ft·lbf
    Max. Rotation
    Speed, rpm
    Parallel
    Angular
    OD
    Overall
    Lg.
    Keyway Wd. ×
    Keyway Dp.
    Drive Direction
    Shaft Mount
    Type
    Standard
    Trade
    No.
    Each
    Single Spring
    1/2" × 1/2"Round × Round0 to 251,8000.01"2 3/4"2 1/4"Clockwise and CounterclockwiseSet ScrewANSI35-24782N1110000000
    1/2" × 5/8"Round × Keyed0 to 251,8000.01"2 3/4"2 1/4"3/16" × 3/32"Clockwise and CounterclockwiseSet ScrewANSI35-24782N113000000
    1/2" × 3/4"Round × Keyed0 to 251,8000.01"2 3/4"2 1/4"3/16" × 3/32"Clockwise and CounterclockwiseSet ScrewANSI35-24782N115000000
    5/8" × 5/8"Keyed × Keyed0 to 251,8000.01"2 3/4"2 1/4"3/16" × 3/32"
    3/16" × 3/32"
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N117000000
    5/8" × 3/4"Keyed × Keyed0 to 251,8000.01"2 3/4"2 1/4"3/16" × 3/32"
    3/16" × 3/32"
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N119000000
    3/4" × 3/4"Keyed × Keyed0 to 251,8000.01"2 3/4"2 1/4"3/16" × 3/32"
    3/16" × 3/32"
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N122000000
    1" × 1"Keyed × Keyed0 to 751,8000.01"3 11/16"2 13/16"1/4" × 1/8"
    1/4" × 1/8"
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N131000000
    12 mm × 12 mmKeyed × Keyed0 to 251,8000.01"2 3/4"2 1/4"4 mm × 2 mm
    4 mm × 2 mm
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N124000000
    12 mm × 15 mmKeyed × Keyed0 to 251,8000.01"2 3/4"2 1/4"4 mm × 2 mm
    5 mm × 2.5 mm
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N126000000
    15 mm × 15 mmKeyed × Keyed0 to 251,8000.01"2 3/4"2 1/4"5 mm × 2.5 mm
    5 mm × 2.5 mm
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N128000000
    15 mm × 20 mmKeyed × Keyed0 to 751,8000.01"3 11/16"2 13/16"5 mm × 2.5 mm
    6 mm × 3 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N133000000
    20 mm × 20 mmKeyed × Keyed0 to 751,8000.01"3 11/16"2 13/16"6 mm × 3 mm
    6 mm × 3 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N135000000
    20 mm × 25 mmKeyed × Keyed0 to 751,8000.01"3 11/16"2 13/16"6 mm × 3 mm
    8 mm × 4 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N137000000
    25 mm × 25 mmKeyed × Keyed0 to 751,8000.01"3 11/16"2 13/16"8 mm × 4 mm
    8 mm × 4 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N139000000
     
    Double Spring
    1/2" × 1/2"Round × Round0 to 501,8000.01"2 3/4"2 1/4"Clockwise and CounterclockwiseSet ScrewANSI35-24782N112000000
    1/2" × 5/8"Round × Keyed0 to 501,8000.01"2 3/4"2 1/4"3/16" × 3/32"Clockwise and CounterclockwiseSet ScrewANSI35-24782N114000000
    1/2" × 3/4"Round × Keyed0 to 501,8000.01"2 3/4"2 1/4"3/16" × 3/32"Clockwise and CounterclockwiseSet ScrewANSI35-24782N116000000
    5/8" × 5/8"Keyed × Keyed0 to 501,8000.01"2 3/4"2 1/4"3/16" × 3/32"
    3/16" × 3/32"
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N118000000
    5/8" × 3/4"Keyed × Keyed0 to 501,8000.01"2 3/4"2 1/4"3/16" × 3/32"
    3/16" × 3/32"
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N121000000
    3/4" × 3/4"Keyed × Keyed0 to 501,8000.01"2 3/4"2 1/4"3/16" × 3/32"
    3/16" × 3/32"
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N123000000
    1" × 1"Keyed × Keyed0 to 1501,8000.01"3 11/16"2 13/16"1/4" × 1/8"
    1/4" × 1/8"
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N132000000
    12 mm × 12 mmKeyed × Keyed0 to 501,8000.01"2 3/4"2 1/4"4 mm × 2 mm
    4 mm × 2 mm
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N125000000
    12 mm × 15 mmKeyed × Keyed0 to 501,8000.01"2 3/4"2 1/4"4 mm × 2 mm
    5 mm × 2.5 mm
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N127000000
    15 mm × 15 mmKeyed × Keyed0 to 501,8000.01"2 3/4"2 1/4"5 mm × 2.5 mm
    5 mm × 2.5 mm
    Clockwise and CounterclockwiseSet ScrewANSI35-24782N129000000
    15 mm × 20 mmKeyed × Keyed0 to 1501,8000.01"3 11/16"2 13/16"5 mm × 2.5 mm
    6 mm × 3 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N134000000
    20 mm × 20 mmKeyed × Keyed0 to 1501,8000.01"3 11/16"2 13/16"6 mm × 3 mm
    6 mm × 3 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N136000000
    20 mm × 25 mmKeyed × Keyed0 to 1501,8000.01"3 11/16"2 13/16"6 mm × 3 mm
    8 mm × 4 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N138000000
    25 mm × 25 mmKeyed × Keyed0 to 1501,8000.01"3 11/16"2 13/16"8 mm × 4 mm
    8 mm × 4 mm
    Clockwise and CounterclockwiseSet ScrewANSI40-24782N141000000
     

    Corrosion-Resistant Overload-Protection Spring-Loaded Torque Limiters

    Image of Product. Front orientation. Torque Limiters. Corrosion-Resistant Overload-Protection Spring-Loaded Torque Limiters .
    Prevent corrosion from interfering with these torque limiters’ ability to protect your machinery if there’s a jam, emergency stop, or other overload. Made of nylon, they won’t rust or corrode from moisture, salt, and oil. They cut off torque when they reach the set maximum torque and automatically resume transmitting torque once it drops below the set maximum. They should not be used in applications that frequently exceed the set torque. You can adjust the set torque by tightening the hex head screw on the housing.
    To help you detect an overload, these torque limiters have a sensor ring that moves out of place when these limiters cut off torque. Use a sensor (not included) to trigger an alarm or a shutdown when the ring moves.
    Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.
    Shaft-to-Shaft
    Shaft-to-shaft torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.
    Misalignment
    Capability
    Keyway
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    Parallel
    Angular
    OD
    Overall
    Lg.
    Wd.
    Dp.
    No. of
    Springs
    Material
    Drive Direction
    Shaft Mount
    Type
    Re-Engagement
    Position
    Features
    Each
    For Round Shafts
    1/4"4 to 601,8000.01"2 1/2"2 1/2"4Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N1010000000
    3/8"4 to 601,8000.01"2 1/2"2 1/2"4Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N102000000
     
    For Keyed Shafts
    1/2"4 to 601,8000.01"2 1/2"2 1/2"1/8"1/16"4Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N103000000
    1/2"40 to 1501,8000.01"4 1/32"3 7/16"1/8"1/16"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N104000000
    5/8"40 to 1501,8000.01"4 1/32"3 7/16"3/16"3/32"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N105000000
    3/4"40 to 1501,8000.01"4 1/32"3 7/16"3/16"3/32"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N106000000
    1"40 to 1501,8000.01"4 1/32"3 7/16"1/4"1/8"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N107000000
     
    Spring Kits
    Through Shaft
    Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
    Keyway
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Rotation
    Speed, rpm
    OD
    Overall
    Lg.
    Wd.
    Dp.
    No. of
    Springs
    Material
    Drive Direction
    Shaft Mount
    Type
    Re-Engagement
    Position
    Features
    Each
    For Round Shafts
    1/4"4 to 601,8002 1/2"2 1/2"4Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N1080000000
    3/8"4 to 601,8002 1/2"2 1/2"4Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N109000000
     
    For Keyed Shafts
    1/2"4 to 601,8002 1/2"2 1/2"1/8"1/16"4Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N111000000
    1/2"40 to 1501,8004 1/32"3 7/16"1/8"1/16"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N112000000
    5/8"40 to 1501,8004 1/32"3 7/16"3/16"3/32"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N113000000
    3/4"40 to 1501,8004 1/32"3 7/16"3/16"3/32"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N114000000
    1"40 to 1501,8004 1/32"3 7/16"1/4"1/8"6Nylon
    Clockwise and CounterclockwiseSet ScrewMultipleSensor Ring4410N115000000
     
    Spring Kits

    Remote-Adjust Air-Powered Friction Torque Limiters

    Use your air system to remotely make changes to the torque setting or cut off torque completely, even during operation. Adjust the torque setting by adjusting the air pressure—the higher the pressure, the higher the set torque. When these torque limiters exceed their set torque, they’ll slip but still transmit the set torque. They use friction to prevent torque overload, control tension, and brake. They’re often used in automated systems. For instance, they can be used in a machine that tightens a bottle cap to a certain torque without overtightening it and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance.
    Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.
    Shaft-to-Shaft
    Image of Product. Front orientation. Torque Limiters. Remote-Adjust Air-Powered Friction Torque Limiters .
    Shaft-to-shaft torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.
    Keyway
    Air Inlet
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Pressure,
    psi
    Max. Rotation
    Speed
    OD
    Overall
    Lg.
    Wd.
    Dp.
    Drive Direction
    Shaft Mount
    Type
    Thread
    Size
    Thread
    Type
    Gender
    Each
    For Round Shafts
    1/4"2 to 20100Not Rated1 1/4"2 1/2"Clockwise and CounterclockwiseSet Screw10-32
    UNF
    Female9133K110000000
    3/8"5 to 50100Not Rated1 1/2"3 3/8"Clockwise and CounterclockwiseSet Screw10-32
    UNF
    Female9133K12000000
    1/2"10 to 100100Not Rated2"3 5/8"Clockwise and CounterclockwiseSet Screw10-32
    UNF
    Female9133K15000000
    5/8"30 to 300100Not Rated2 3/4"3 5/8"Clockwise and CounterclockwiseSet Screw10-32
    UNF
    Female9133K19000000
     
    For Keyed Shafts
    1/2"10 to 100100Not Rated2"3 5/8"1/8"1/16"Clockwise and CounterclockwiseSet Screw10-32
    UNF
    Female9133K53000000
    5/8"30 to 300100Not Rated2 3/4"3 5/8"3/16"3/32"Clockwise and CounterclockwiseSet Screw10-32
    UNF
    Female9133K54000000
     
    Through Shaft
    Image of Product. Front orientation. Torque Limiters. Remote-Adjust Air-Powered Friction Torque Limiters .
    Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
    Keyway
    Air Inlet
    For Shaft
    Dia.
    Torque,
    in·lbf
    Max. Pressure,
    psi
    Max. Rotation
    Speed
    OD
    Overall
    Lg.
    Wd.
    Dp.
    Drive Direction
    Shaft Mount
    Type
    Mounting Hole
    Thread Size
    Thread
    Size
    Thread
    Type
    Gender
    Each
    For Round Shafts
    1/4"2 to 20100Not Rated1 1/4"2 1/2"Clockwise and CounterclockwiseSet Screw4-40
    10-32
    UNF
    Female9133K310000000
    3/8"5 to 50100Not Rated1 1/2"3 3/8"Clockwise and CounterclockwiseSet Screw6-32
    10-32
    UNF
    Female9133K32000000
    1/2"10 to 100100Not Rated2"3 5/8"Clockwise and CounterclockwiseSet Screw6-32
    10-32
    UNF
    Female9133K33000000
     
    For Keyed Shafts
    5/8"30 to 300100Not Rated2 3/4"3 5/8"3/16"3/32"Clockwise and CounterclockwiseSet Screw8-32
    10-32
    UNF
    Female9133K44000000
     
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