McMaster-Carr logo
    Filter by
    Power Source
    System of Measurement
    Diameter
    Attribute Image
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Compare
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Height
    Mounting Position
    Number of Mounting Holes
    Through-Hole Diameter
    Workpiece Diameter
    Mounting Hole Diameter
    Total Indicated Runout (TIR) Accuracy
    Overall Length
    Body Diameter
    External Thread Size
    Industrial Info Snippet
    For Holding
    For Use With
    For Number of Collets
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    Help me decide (beta)
    17 Products

    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, Fixed Length—Flange Mount.

    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.
    Fixed Length Collet Fixture—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
    Mounting
    Holes
    Port
    For Collet
    Type
    For No.
    of Collets
    For Max. Workpiece
    Dia.
    Through-Hole
    Dia.
    Lg.
    Wd.
    Ht.
    Max. Hydraulic
    Pressure, psi
    Max. Hydraulic-Powered
    Clamping Force, psi
    Material
    No.
    of
    Dia.
    No.
    of
    Pipe
    Size
    Thread
    Type
    Includes
    Each
    Each
    Collet Fixtures with Top-Locking Screw
     
    Fixed Length—Flange Mount
    3J11 3/4"1 15/16"4"4"3 3/4"5,0009,500Steel
    		43/8"27/16UNF
    		Collet Wrench3115N190000000003115N12000000
     

    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.
    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
    3J1 3/4"1 15/16"5"4"Black-Oxide Steel63/8"4 1/8"Horizontal, VerticalManualSocket Wrench3174A33000000000

    Machine-Your-Own 3J Lathe Collets

    Image of Product. Front orientation. Lathe Collets. Machine-Your-Own 3J Lathe Collets.
    When installed into a 3J collet chuck or holder, these collets can securely grip workpieces. Also known as emergency collets, their machinable face allows you to bore an opening to exactly the size and shape you need. All have external threads.
    Max. Bore
    Dia.
    Body
    Dia.
    Overall
    Lg.
    Face Pilot
    Hole Dia.
    External Thread
    Size
    Material
    Each
    Machine-Your-Own Face
    1 3/4"2"3 3/4"1/16"1.988"-20Hardened Steel3811A1610000000
     

    Lathe Collet Wrenches

    Image of Product. Front orientation. Lathe Collet Wrenches. Aluminum Handle.
    Image of Product. Front orientation. Lathe Collet Wrenches. External Hex Drive.

    Aluminum Handle

    External

    Hex Drive

    Install and remove lathe collets from collet chucks and fixtures with these specialized wrenches. Fins on the wrench slide into slots on the collet. Choose the wrench that works with your lathe collet type.
    Aluminum Handle—Knurled aluminum surface provides a better hand grip than plastic handles. When necessary, a cross-drilled hole allows for extra leverage. Just insert a screwdriver or similar rigid tool when more torque is needed.
    External Hex Drive—Tighten and loosen collets by hand in tight spaces. You can also use a wrench or socket for more torque.
    Material
    No. of
    Fins
    Handle
    Material
    Drive Style
    Head
    Fin
    Head
    Dia.
    Overall
    Lg.
    Each
    For 16C or 3J Collets
    3Aluminum
    		—Black-Oxide SteelBlack-Oxide Steel1 3/4"4 1/4"3197A11000000
    3—External Hex
    		SteelSteel2 1/8"1 1/8"3197A1600000
    4Aluminum
    		—Black-Oxide SteelBlack-Oxide Steel1 3/4"4 1/4"3197A1200000
    4—External Hex
    		SteelSteel2 1/8"1 1/8"3197A1700000
     

    3J Lathe Collets

    Image of Product. Front orientation. Lathe Collets. 3J Lathe Collets.
    When installed into a 3J collet chuck or holder, these collets securely grip round workpieces. They provide a stronger hold on small workpieces than a standard lathe chuck. All have external threads.
    Collet
    Size
    Total Indicated Runout
    (TIR) Accuracy
    Workpiece Dia.
    Tolerance
    Body
    Dia.
    Overall
    Lg.
    External Thread
    Size
    Material
    Each
    Round Face
    3/8"0.0008"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A1110000000
    1/2"0.0011"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A112000000
    5/8"0.0011"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A113000000
    3/4"0.0015"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A114000000
    7/8"0.0015"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A115000000
    1"0.0015"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A121000000
    1 1/8"0.0015"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A122000000
    1 1/4"0.0015"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A123000000
    1 1/2"0.0015"-0.004" to 0"2"3 3/4"1.988"-20Steel
    		3811A124000000
     
    back to top