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New Item!
7500 psi max
Single Acting
FEATURES: Work Supports automatically adjust to the proper height for supporting a workpiece, then lock securely to become fixed rests. Support plunger is held by a precision sliding-fit pressure sleeve that provides incredible accuracy and repeatability. Fluid-advanced Work Supports provide extra loading clearance and are ideal for workpieces that are too light to depress a springloaded plunger. The threaded-body version shown here is amazingly compact. Manifold mounting capability allows space-saving lowheight installation. This support is ideal for floodcoolant applications because it uses a separate air passage to vent the internal spring area. Hardened contact bolt furnished.
SIZES: Available in one size, with metric threads — see Dimensions page for part number. Load capacity at 7500 psi:
SUPPORT ACTION (FLUID ADVANCED): Plunger is normally retracted for clear workpiece loading and unloading. Applying fluid pressure gently advances the plunger to the workpiece, where it contacts with light spring force. When fluid pressure is applied, the precision sleeve grips the plunger, locking it securely. The plunger retracts again when pressure is released.
ACCURACY: Height repeatability within +/-.0002". Such excellent repeatability is possible because of two design features: 1) the sliding-fit pressure sleeve holds the plunger absolutely vertical even while unlocked, avoiding any inaccuracy due to locking a tilted plunger, and 2) locking force is entirely radial, so the plunger remains absolutely stationary during the locking process. Elastic deflection of the plunger is only .00012" per 100 lbs machining load.
DESIGN CONSIDERATIONS: If the workpiece is light enough that plunger contact could lift it, use a Sequence Valve to delay advancing the work support until after the workpiece is clamped. Do not exceed maximum fluid flow rate in table; otherwise the support could lock prematurely before the plunger is fully extended. Do not use the plunger to lift loads. The support plunger must always be protected against penetration of contaminants by a contact bolt (furnished). When supporting underneath a clamp, use a Sequence Valve to delay clamping until the Work Support has reached sufficient load capacity to resist the clamping force. Support load capacity should be at least 2 times clamping force at all times, to resist not only static clamping force, but also dynamic forces due to clamping-arm momentum and machining forces.
MOUNTING: For manifold mounting, install support directly into a flat-bottom tapped hole in the fixture – see Dimensions page for hole preparation instructions. Support can also be installed in an optional mounting block, which is fastened using socket-head cap screws. In all cases, hydraulic sealing is accomplished by a Sealing Washer (furnished) placed directly underneath the support. Tighten to the recommended seating torque of 74 ft-lbs.
FLUID CONNECTION: For manifold mounting, fluid passages must be drilled as shown in the drawings. Do not use NPT fittings.
CONSTRUCTION: Plunger > Steel, case hardened. Body > Steel, black oxide finish. Sealing Washer > Delrin. |
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