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    Hollow Cylinders

    Hollow Cylinders, B1.7441

    Power Workholding

    7250 psi max
    Single Acting
    Hollow Cylinders have a hole through the center of their plunger to accept a stud or drawbar. This is useful for transmitting force to a remote location using a drawbar. Hollow Cylinders can be used for pulling or for pushing. Available in six sizes, single acting, and double acting. As shown below, the smallest three sizes have an integral mounting flange, while the largest three sizes are cylindrical with an attachable mounting flange available separately.

    The plunger's center hole is threaded at the top end with counterbored relief below. These threads can optionally be drilled out to the counterbore diameter if an unthreaded center hole is required. A threaded center hole is ideal for pulling or pushing a drawbar. An unthreaded center hole is useful if the clamp is removed for workpiece loading.

    Hollow Cylinders, B1.7441 (M6, M10, M12)

    Hollow Cylinders are available in six sizes, single acting, and double acting. The smallest three sizes, with an integral flange, are shown here. Clamping force at 7250 psi:
    2300 Lbs M6 stud
    7000 Lbs M10 stud
    11000 Lbs M12 stud

    Hollow Cylinders, B1.7441 (M16, M20, M24)

    Hollow Cylinders are available in six sizes, single acting, and double acting. The largest three sizes, without an integral flange, are shown here. Clamping force at 7250 psi:
    16500 Lbs M16 stud
    26000 Lbs M20 stud
    42400 Lbs M24 stud

    Clamping Action

    Applying fluid pressure advances the plunger, pulling up a stud or drawbar inserted through the center hole. Spring return (single acting) or fluid return (double acting).

    Design Considerations

    Hollow Cylinders exert considerable force, so always use a grade 8 stud or equivalent drawbar at 5000 psi and above.

    Mounting & Fluid Supply

    Mounting on a Clamp Strap:
    Use either a threaded-hole or unthreaded-hole clamp. Mount on the clamp strap's center stud (longer stud usually required). Use a Spherical Washer underneath the clamp to compensate for the clamp-strap angle. When using a threaded-hole clamp, install with a flexible hose because the clamp body will move slightly during clamping.
    Mounting on a Fixture Plate:
    Insert four socket-head cap screws through the flange base from above and screw into a fixture (flange base must be ordered separately for M16, M20, and M24 sizes – fasten to clamp with four additional socket-head cap screws). Alternatively, insert cap screws up through the fixture plate and screw into the clamp from below.
    Mounting through a Bored Hole:
    Insert four socket-head cap screws through the flange base from below and screw into a fixture. Alternatively, fasten with optional lock nut (two required for M16, M20, and M24 sizes).
    Fluid Connection:
    1/4" BSPP port (two for double-acting clamps). Do not use NPT fittings.

    Material

    Plunger > Steel, case hardened. Body > Steel, black oxide finish.

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    CL-CLR-11-HCA

    SKU: CL-CLR-11-HCA
    MPN: CLR-11-HCA
    Email Sales for Pricing
    Hollow Cylinders have a hole through the center of their plunger to accept a stud or drawbar. Quickly convert clamp straps from manual to power operation. Useful for transmitting force to a remote location using a drawbar. Hollow Cylinders can be used for pulling or for pushing.

    LOCK RING FOR H/P CLAMP CL-CLR-99-HCA

    SKU: CL-CLR-99-HCA
    MPN: CLR-99-HCA
    Email Sales for Pricing
    Hollow Cylinders have a hole through the center of their plunger to accept a stud or drawbar. Quickly convert clamp straps from manual to power operation. Useful for transmitting force to a remote location using a drawbar. Hollow Cylinders can be used for pulling or for pushing.

    LOCK RING FOR HOLLOW PISTON CLAMP CL-CLR-24-HCA

    SKU: CL-CLR-24-HCA
    MPN: CLR-24-HCA
    Email Sales for Pricing
    Hollow Cylinders have a hole through the center of their plunger to accept a stud or drawbar. Quickly convert clamp straps from manual to power operation. Useful for transmitting force to a remote location using a drawbar. Hollow Cylinders can be used for pulling or for pushing.

    LOCK RING FOR HOLLOW PISTON CLAMP M75 x 1.5 mm CL-CLR-73-HCA

    SKU: CL-CLR-73-HCA
    MPN: CLR-73-HCA
    Email Sales for Pricing
    Hollow Cylinders have a hole through the center of their plunger to accept a stud or drawbar. Quickly convert clamp straps from manual to power operation. Useful for transmitting force to a remote location using a drawbar. Hollow Cylinders can be used for pulling or for pushing.

    Hollow Cylinders