Hydraulic Clamping Fundamentals

Never “strike” or “rap” the end of the plunger to see if it is locked in place. A 16 penny nail protruding from a board will support many times more than the weight of a hammer, and all of the force you can push with the hammer. However, the shock load generated by striking the nail with the hammer will drive the nail into the board. The work support will function similarly to that of the nail. Typically, the work support should be installed so that when the plunger engages a nominal work-piece, it is at one half of the total stroke. This positioning will allow the stroke of the work support to compensate for reasonable variations from one work-piece to the next. The metal components on the work support are corrosion resistant. The maximum functional system backpressure a fluid advanced work support can readily overcome is 10 psi. If the backpressure during the return, or unclamp cycle is greater than this, the work support will be slow to retract, or possibly not retract at all.

Referring to the following chart, if the system pressure is intended to operate at 2500 PSI, the work support will resist approximately #297 of force. The clamp shown in the chart will produce approximately #207 of clamp force at the same hydraulic pressure. This will result in approximately #90# of support force to resist the operation being preformed on the work-piece. If more support resistance is required, the system pressure must be increased, the size of the work support must be increased, or the size of the clamp must be decreased. If a larger clamp must be used for any reason, the hydraulic pressure supplied to the clamp must be reduced to limit the clamp force accordingly.

Fluid / Coolant Compatibility Work supports are furnished with AU

compound seals as standard. This compound provides excellent service in a wide variety of coolant applications. However, before using work supports in synthetic or water-based coolants contact your coolant manufacture or supplier for seal compatibility recommendations. Fluorocarbon seals are available as an option, but have a significantly shorter life than standard seals. When the fixture is taken out of service, it is important that the work supports be cleaned of coolant residue before storage. Failure to clean

Caution: If the hydraulic system pressure is inadequate for anticipated load, the work support will not provide the desired support capacity, and will have a reduced service life. GENERAL INFORMATION

Never use a work support to move a load. It is not a cylinder, and therefore will not perform the same function as cylinder.

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