ROEMHELD Threaded-Body Work Supports – Fluid Advanced, Double Acting, B1.9402 (1460, 2100 lbs)

ROEMHELD Power Workholding

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Product Information

7250 psi max

Double Acting

Fluid Advanced

Work Supports automatically adjust to the proper height for supporting a workpiece, then lock securely to become fixed rests. Fluid-advanced Work Supports provide extra loading clearance and are ideal for workpieces that are too light to depress a spring-loaded plunger. In the double-acting type shown here, the return stroke of the support plunger is effected in a precisely defined time, which is advantageous in timing-dependent automated installations. These mini Threaded-Body Work Supports are amazingly compact. Manifold mounting capability allows space-saving low-height installation. Hardened contact bolt furnished.

Available in two sizes, standard or long stroke, with the following load capacities at 7250 psi:

1460 lbs (Metric – Standard & Long Stroke)

2100 lbs (Metric – Standard & Long Stroke)

Application Information

A specially designed metallic wiper edge effectively protects the FKM plunger wiper from hot, abrasive chips.

Documents

B1.9402

Data Sheet

Sizes & Load Capacity

1460 Lbs

Standard Stroke & Long Stroke

2100 Lbs

Standard Stroke & Long Stroke

Support Action (Fluid Advanced, Double Acting)

Plunger is normally retracted for clear workpiece loading and unloading. Applying fluid pressure to the lower passage gently advances the plunger to the workpiece, where it contacts with light spring force. As fluid pressure increases, the precision sleeve grips the plunger, locking it securely. The plunger retracts again when pressure is switched to the upper passage.

Locking height is repeatable within +/-.0002". Such excellent repeatability is possible because of two design features: 1) a precision 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.

Design Considerations

Supporting underneath a clamp

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, or support side 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 & Fluid Supply

Install Work Support directly into a flat-bottom tapped hole in the fixture – see drawings for hole-preparation instructions. Tighten to the recommended seating torque of 50 ft-lbs. Fluid passages must be drilled as shown in the drawings. Do not use NPT fittings.

Materials

ITEM	MATERIAL	HEAT TREAT	FINISH	DFARS	RoHS
Plunger	Steel	-	Case Hardened	✔	✔
Body	Steel	-	Black Oxide	✔	✔
Sealing Washer	Delrin	-	-	✔	✔

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.