McMaster-Carr logo
    Filter by
    Actuation Type
    System of Measurement
    Body Width
    Clamping Action
    Maximum Clamping Clearance
    Attribute Image
    Mounting Hole Location
    Number of Mounting Holes
    Power Source
    Vertical Travel During Rotation
    Gender
    Height
    Maximum Pressure
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Range of Motion
    Thread Size
    Industrial Info Compare
    Overall Height
    Overall Stroke
    Body Depth
    Clamp Type
    Material
    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)
    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.
    Double Acting—Double-acting clamps use pressure both to clamp and release a workpiece, giving you precise control over the process. They’re more efficient than single-acting clamps, since their release is quicker and more predictable. They’re a good choice if you need to coordinate the action of multiple 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
    Double Acting
     
    90° Clockwise Rotation
    4 9/16"1/2"3/8"5 5/16"2 1/4"2 1/8"UN/UNF (SAE Straight)
    		7/16"-20
    		1,250Yes31/4"-28
    		5/8"Lower FlangeSteel9964N10400000002 5/8"1 9/16"9964N1140000005 13/16"9964N1170000000
     
    90° Counterclockwise Rotation
    4 9/16"1/2"3/8"5 5/16"2 1/4"2 1/8"UN/UNF (SAE Straight)
    		7/16"-20
    		1,250Yes31/4"-28
    		5/8"Lower FlangeSteel9964N1110000002 5/8"1 9/16"9964N114000005 13/16"9964N117000000
     
    back to top