Air Bearing Application and Design Guide Rev E - New Way

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Com Page 63 of 68 New Way Air Bearings Air Bearing Application and Design Guide 19. Airflow through the bearing gap Airflow through a bearing gap is quite sensitive to the gap; in fact it is a cube function of the gap. As an example of two inch diameter bearing with 75 pounds of load would consume 4 standard cubic feet per hour at 200 micro inches of lift. For this bearing to carry the same load at 400 micro inches of lift 64 standard cubic feet per hour of air would be required. It can easily be seen that small gaps keep restriction high and hence reduce flow and power requirements.

This would be catastrophic for an orifice or step compensated bearing. Oil contamination though is more easily cleaned out of an orifice bearing than a porous bearing. Water contamination can usually be corrected by the introduction of clean dry air to the system providing the components are not subject to oxidation. com Page 59 of 68 New Way Air Bearings Air Bearing Application and Design Guide 16. Measuring flow Air is a compressible fluid. If one cubic foot of air at atmospheric pressure is compressed to 60psi, about four times atmospheric pressure, it will occupy less than one-half of a cubic foot of volume.

Con: Difficult alignment of straightness guide rails. More deflection of keeper. Double Rail Keeper Outside Guide Pro: Flatness guidance from base granite. Less deflection of keeper. Con: Difficult alignment of straightness guide rails. Double Rail Keeper Inside Dovetail Guide Pro: Less precision surfaces. Suitable for wide stages. Con: Doubly difficult alignment! Minimal pre-load capability. com Page 43 of 68 New Way Air Bearings Air Bearing Application and Design Guide Female V and Flat Pro: Quasi Kinematic Design.

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