McMaster-Carr logo
    Filter by
    Rotation Direction
    System of Measurement
    Maximum Clamping Clearance
    Attribute Image
    Clamping Action
    Vertical Travel During Rotation
    Actuation Type
    Clamp Type
    Thread Size
    Industrial Info Compare
    Gender
    Range of Motion
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Industrial Info Snippet
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Height
    Mounting Hole Location
    Mounting Hole Thread Type
    Body Width
    Maximum Clamping Stroke
    Maximum Temperature
    Minimum Temperature
    Mounting Hole Depth
    Mounting Hole Thread Size
    Industrial Info Snippet
    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)
    4 Products

    Hydraulic Hold-Down Fixture Clamps

    Image of Product. Clamping Arm Shown in Clamping Position (Sold Separately). Front orientation. Contains Annotated. Fixture Clamps. Hydraulic Hold-Down Fixture Clamps.
    Image of Attribute. Clamping Arm Shown in Open Position (Sold Separately). Front orientation. Contains Annotated. Hydraulic Hold-Down Fixture Clamps.
    Image of Attribute. Hydraulic Ports. Back orientation. ZoomedIn view. Contains Annotated, Border. Hydraulic Hold-Down Fixture Clamps.

    Clamping Arm Shown

    in Clamping Position

    (Sold Separately)

    Clamping Arm Shown in

    Open Position (Sold

    Separately)

    Hydraulic Ports

    Best for CNC milling, these clamps combine 10 times the force of air-powered clamps with automated swing action for fast, secure workholding. Their clamping arm (sold separately) rotates up and out of the way when not engaged, so you can easily insert and remove your workpiece.
    Connect your hydraulic line to the back or the bottom of the clamp. All ports are sealed with an O-ring and a screw; unseal the port you want to use.
    Single Acting—Single-acting clamps only use pressure to clamp down on a workpiece. When you release the pressure, a spring returns the clamping arm to its original position. They’re a good choice for simple setups, where you only need one or two clamps.
    Maximum Clamping Stroke—Maximum clamping stroke is the vertical distance a clamping arm can travel to clamp a workpiece.
    Arms—Choose an arm best suited for your application. Machinable arms let you customize the length and shape to suit your application. Because they are longer than standard arms, you’ll have to use lower pressure, and their actual clamping force will be lower than the listed rating.
    Clamps
    Arms
    Machinable Arms
    Body
    Female Inlet
    and Outlet
    Mounting Holes
    Max. Clamping
    Clearance
    Vert. Travel
    During Rotation
    Max. Clamping
    Stroke
    Overall
    Ht.
    Wd.
    Dp.
    Thread Type
    Thread
    Size
    Max. Clamping
    Force, lbf
    Mounting Fasteners
    Included
    No.
    of
    Thread
    Size
    Dp.
    Location
    Material
    Each
    Lg.
    Reach
    Lg.
    Each
    Lg.
    Each
    Single Acting
     
    90° Clockwise Rotation
    6 3/16"21/32"5/8"8 7/8"3 1/2"3 15/16"UN/UNF (SAE Straight)
    		7/16"-20
    		7,450Yes43/8"-24
    		3/4"Lower FlangeSteel
    		9964N1030000000004 3/4"2 11/16"9964N11600000008 1/2"9964N1190000000
     
    90° Counterclockwise Rotation
    6 3/16"21/32"5/8"8 7/8"3 1/2"3 15/16"UN/UNF (SAE Straight)
    		7/16"-20
    		7,450Yes43/8"-24
    		3/4"Lower FlangeSteel
    		9964N109000000004 3/4"2 11/16"9964N1160000008 1/2"9964N119000000
     
    back to top