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    23 Products

    Collet Fixtures

    Pair these fixtures with collets to tightly grip workpieces for machining. You can mount them on milling machines, drill presses, and other work surfaces. However, they’re not for use with lathes, grinders, or high-speed rotary tables. All have a through hole to accommodate long workpieces.
    Lever Actuator
    Image of Product. Front orientation. Collet Fixtures, Lever Actuator.
    Lever fixtures have a handle that can be indexed to any position—no tools required. They’re often used for quickly swapping workpieces in and out, when a simple clamping mechanism is more important than consistent holding force. These fixtures keep the collet stationary while their sleeve clamps. Made from cast iron, they dampen vibration better than steel fixtures, though they’re less durable.
    Mounting
    Slots
    For Collet
    Type
    For Max. Workpiece
    Dia.
    Through-Hole
    Dia.
    Lg.
    Wd.
    Ht.
    Material
    No.
    of
    Wd.
    Mounting Position
    Power
    Source
    Each
    5C1 1/16"1 1/16"3 3/4"5"4"Enamel-Coated Cast Iron411/16"Horizontal, VerticalManual00000000000000
    Collet Nut Actuator
    Image of Product. Front orientation. Collet Fixtures. Collet Fixtures, Collet Nut Actuator.
    Collet nut fixtures convert ER collets—typically used to hold tool bits—into holders for cylindrical workpieces. The tapered, slit design of the collet distributes clamping force evenly around a workpiece. This creates a stable, consistent grip that keeps your workpiece from shifting, even under 5-axis machining forces. These fixtures are made of steel to withstand the high clamping forces and frequent cycles of production environments.
    Mounting
    Holes
    For Collet
    Type
    For Max. Workpiece
    Dia.
    Through-Hole
    Dia.
    Dia.
    Ht.
    Material
    No.
    of
    Dia.
    Bolt Circle
    Dia.
    Mounting Position
    Power
    Source
    Each
    ER-163/8"7/16"2 3/4"2 1/2"Black-Oxide Steel41/4"2 1/8"Horizontal, VerticalManual00000000000000
    ER-201/2"7/16"2 3/4"2 1/2"Black-Oxide Steel41/4"2 1/8"Horizontal, VerticalManual0000000000000
    ER-255/8"7/16"2 3/4"2 1/2"Black-Oxide Steel41/4"2 1/8"Horizontal, VerticalManual0000000000000
    ER-255/8"11/16"5"3"Black-Oxide Steel47/16"4"Horizontal, VerticalManual0000000000000
    ER-3213/16"11/16"5"3"Black-Oxide Steel47/16"4"Horizontal, VerticalManual0000000000000
    ER-401"11/16"5"3"Black-Oxide Steel47/16"4"Horizontal, VerticalManual0000000000000
    Square Drive Actuator
    Image of Product. Front orientation. Collet Fixtures. Collet Fixtures, Square Drive Actuator.
    Square-drive fixtures are designed for precise, repeatable workholding with consistent clamping force. They keep the collet stationary while their sleeve clamps. Made of steel, these fixtures are stronger and more wear resistant than cast iron fixtures, and they can hold up to higher clamping forces. They’re precision machined for accuracy. Use the included socket wrench to clamp and unclamp your workpiece or use a calibrated torque wrench to fine-tune the clamping force.
    Mounting
    Holes
    For Collet
    Type
    For Max. Workpiece
    Dia.
    Through-Hole
    Dia.
    Dia.
    Ht.
    Material
    No.
    of
    Dia.
    Bolt Circle
    Dia.
    Mounting Position
    Power
    Source
    Includes
    Each
    5C1 1/16"1 3/16"5"3 1/2"Black-Oxide Steel63/8"4 1/8"Horizontal, VerticalManualSocket Wrench0000000000000000
    16C1 5/8"1 13/16"5"4 1/2"Black-Oxide Steel63/8"4 1/8"Horizontal, VerticalManualSocket Wrench000000000000000
    3J1 3/4"1 15/16"5"4"Black-Oxide Steel63/8"4 1/8"Horizontal, VerticalManualSocket Wrench000000000000000

    Air-Operated Collet Fixtures

    Image of Product. Front orientation. Collet Fixtures. Air-Operated Collet Fixtures, Sold Individually.
    Image of Product. Front orientation. Collet Fixtures. Air-Operated Collet Fixtures, Sold as Kits.

    Sold Individually

    Sold as Kits

    Control clamping action with air. Use 5C collets (sold separately) to grip and release parts on milling machines and drill presses.
    Mounting
    Holes
    Air Inlet
    Sold As
    For Collet
    Type
    For Max. Workpiece
    Dia.
    Dia.
    Ht.
    Max. Clamping
    Pressure, psi
    Max. Air Pressure,
    psi
    Material
    No.
    of
    Dia.
    Mounting
    Position
    No. of
    Air Ports
    Connection
    Port
    Pipe
    Size
    Thread
    Type
    Gender
    Power
    Source
    Includes
    Each
    Individual5C1 1/16"5 1/2"3 1/4"1,125150Aluminum43/8"Vertical2Hose1/4
    		NPS
    		MaleAir—00000000000000
    Kit5C1 1/16"5 1/2"3 1/4"1,125150Aluminum43/8"Vertical2Hose1/4
    		NPS
    		MaleAirAir-Operated Fixture, Four-Way Foot-Operated Air Valve, Three 6-ft. Long Air Hoses0000000000000

    High-Density Air/Hydraulic-Operated Collet Fixtures

    Image of ProductInUse. Four Fixtures (Each Sold Separately). Front orientation. Collet Fixtures. High-Density Air/Hydraulic-Operated Collet Fixtures.

    Four Fixtures (Each Sold Separately)

    Image of Product. Front orientation. Collet Fixtures. High-Density Air/Hydraulic-Operated Collet Fixtures, Pull Back.
    Image of Product. Front orientation. Collet Fixtures. High-Density Air/Hydraulic-Operated Collet Fixtures, Pull Back—Flange Mount.

    Pull Back

    Pull Back—Flange Mount

    Image of Product. Fixed Length. Front orientation. Collet Fixtures. High-Density Air/Hydraulic-Operated Collet Fixtures, Fixed Length.
    Image of Product. Front orientation. Collet Fixtures. High-Density Air/Hydraulic-Operated Collet Fixtures, Fixed Length—Flange Mount.

    Fixed Length

    Fixed Length—Flange Mount

    Push a button to clamp or release multiple workpieces on your milling machine or drill press. To create a high-density setup, mount these fixtures and join them together using two connector bushings (sold separately) for each fixture you want to add. These fixtures have a through hole for clamping long workpieces.
    Air or hydraulic pressure opens and closes the collets (not included). A good choice for heavy machining, these fixtures provide a tighter hold than you can achieve with manual power. You can operate multiple fixtures with a single valve (not included) and two hoses—one for supply and one for return. All are double acting, so they need air or hydraulic pressure both to open and close. This means that the workpiece stays locked in place even if you lose pressure. Clamping force depends on the air or hydraulic pressure of your system.
    Top-Locking Screw—Fixtures with a top-locking screw allow for direct access to make adjustments without disassembling your setup.
    Pull Back—Pull-back fixtures have tapered walls that press all sides of the collet evenly to center the workpiece—like how a mechanical pencil grips lead. They’re less precise than fixed-length fixtures because the workpiece may shift slightly during clamping.
    Fixed Length—Fixed-length fixtures, also known as dead-length fixtures, keep the collet stationary while they clamp onto a workpiece. Use them to precisely machine holes, slots, and contours exactly where you need them. Since these fixtures position workpieces consistently, they’re often used for high-volume production runs. You can also rotate them on an indexer or rotary table without losing your reference point.
    Collet Fixtures
    Connectors
    Max.
    Pressure, psi
    Max. Clamping
    Force, psi
    Mounting
    Holes
    Mounting
    Slots
    Port
    For Collet
    Type
    For No.
    of Collets
    For Max. Workpiece
    Dia.
    Through-Hole
    Dia.
    Lg.
    Wd.
    Ht.
    Air
    Hydraulic
    Air-Powered
    Hydraulic-Powered
    Material
    No.
    of
    Thread
    Size
    Dia.
    Lg.
    Wd.
    No. of
    Ports
    Pipe
    Size
    Thread
    Type
    Thread
    Gender
    Includes
    Each
    Each
    Collet Fixtures with Locking Screw
     
    Pull Back
    5C11 1/16"1 3/16"4"4"3 1/2"150—1,125—Aluminum43/8"-24
    		———21/4
    		NPT
    		FemaleCollet Wrench000000000000000000000000000
     
    Pull Back—Flange Mount
    5C11 1/16"1 3/16"6 1/2"4"3 1/2"150—1,125—Aluminum43/8"-24
    		—1"1/2"21/4
    		NPT
    		FemaleCollet Wrench0000000000000000000000000
     
    Collet Fixtures with Top-Locking Screw
     
    Fixed Length
    1C11/4"5/16"1 3/4"1 3/4"1 7/16"250750180545Aluminum410-24
    		———21/8
    		NPT
    		FemaleCollet Wrench0000000000000000000000000
    3C11/2"5/8"2 1/2"2 1/2"2 3/4"250750300900Aluminum41/4"-20
    		———21/8
    		NPT
    		FemaleCollet Wrench0000000000000000000000000
    5C11 1/16"1 3/16"4"4"3 5/16"1504003,82519,125Aluminum43/8"-16
    		———21/4
    		NPT
    		FemaleCollet Wrench0000000000000000000000000
    5C31 1/16"1 3/16"8"3 1/2"3 5/16"—5,000—5,500Aluminum45/16"-18
    		———27/16UNF
    		FemaleCollet Wrench000000000000000000000000000
    16C11 5/8"1 7/8"4"4"4 1/4"2502,0001,45011,600Aluminum43/8"-16
    		———21/4
    		NPT
    		FemaleCollet Wrench0000000000000000000000000
     
    Fixed Length—Flange Mount
    3J11 3/4"1 15/16"4"4"3 3/4"—5,000—9,500Steel4—3/8"——27/16UNF
    		FemaleCollet Wrench000000000000000000000000000
     
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