F12-090 Hydraulic Open circuit pumps_Parker Axial piston fixed High pressure pump

Bearing life calculation An application is usually governed by a certain duty or work cycle where pressure and speed vary with time during the cycle. In addition, bearing life depends on external shaft forces, fluid viscosity in the case and fluid contamination. Parker Hannifin has a computer program for calculating bearing life and will assist in determining F10, F11 or F12 motor/pump life in a specific application.

The direction (α) of the radial load is positive in the direction of rotation as shown. To obtain maximum bearing life, the radial load should, in most cases, be located between 170° and 190°.