ROEMHELD Flange-Base Work Supports – Fluid Advanced, Double Acting, B1.911 (11000 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. The flange-base version shown here has a high load capacity and provides many mounting options. This is a double-acting work support, useful in automated systems where the return stroke must be completed within a certain time. Metallic wiper edge and FKM wiper together provide excellent protection against dirt and coolant entry. Hardened contact bolt furnished.

Available in one size, with inch or metric plunger threads. Choice of two types: Type 1 operates like a normal work support, while Type 2 has an additional port for locking only. Load capacity at 7250 psi:

11000 lbs

Application Information

These Work Supports have a long stroke to provide a large adjustment range.

Documents

B1.911

Data Sheet

Support Action (Fluid Advanced, Double Acting)

Type 1:

Plunger is normally retracted for clear workpiece loading and unloading. Applying fluid pressure to the A port 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 E port.

Type 2:

Plunger is normally retracted for clear workpiece loading and unloading. Applying fluid pressure to the A port gently advances the plunger to the workpiece, where it contacts with light spring force, but does not lock. When fluid pressure is applied to the K port, the precision sleeve grips the plunger, locking it securely. The plunger retracts again when pressure is released from the K port, and switched from the A to the E port.

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

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 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

The flange base has two through holes and two tapped holes for mounting. Several possible mounting methods: 1) fasten to top of fixture plate with two socket-head cap screws, either inserted through the flange base from above, or threaded into the flange base from below; 2) Mount through a bored hole in the fixture plate, fastening with two socket-head cap screws, either inserted through the flange base from below, or threaded into the flange base from above; 3) Mount through a tapped hole in the fixture plate, securing with a lock ring; 4) Mount through a bored hole in the fixture plate, securing with one or two lock rings. 1/4" BSPP ports. Do not use NPT fittings.

Material

Click here for detailed material and finish specifications.

California residents click here for Prop 65 information.

ITEM	MATERIAL	HEAT TREAT	FINISH
Plunger	Steel	Case Hardened	-
Body	Steel	-	Black Oxide