A17F A17FO A17FO023 A17FO032 A17FO045 A17FO063 A17FO080 A17FO107 Series A17F0063/10NLWKCE81-0 Hydraulic Piston Pump

One is to try to manufacture pumps with the precise tolerances required for efficient operation. The mating surface between the rotary piston cylinder assembly and the fixed pump body must be almost sealed, while the rotational speed of the rotating parts may be 3000 rpm. The diameter of the piston is typically less than half an inch (13 millimeters) and the stroke length is similar. Keeping the wall and piston tightly sealed means that very small gaps are involved, and the materials must be closely matched to achieve similar coefficients of expansion.

product-800-139

The piston of an axial piston pump must somehow be pulled outward from its cylinder. On small pumps, this can be accomplished by a spring inside the cylinder that pushes the piston towards the cylinder. The inlet fluid pressure can also be set such that the fluid pushes the piston upward toward the cylinder. Typically, vane pumps are located on the same drive shaft to provide this pressure, and it also allows the pump assembly to draw fluid from certain suction heads of the reservoir, which is not an attribute of independent axial piston pumps.

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