Abstract
An economical method to manufacture aerostatic journal and thrust bearings has been established. The spindle or master spindle is used as a mold, and the epoxybased resin is poured into the clearances between the mold and the housing to reproduce the shape of the mold. Thus, comparatively accurate bearing surfaces can be obtained easily. After the resin is hardened, air feed holes are drilled. This method is applied to manufacture bearings of wheel-support and work-support systems of a small cylindrical grinding machine in order to verify the performances in practical use. Radial maximum stiffness and load capacity of the wheel spindle journal bearing, for example, are 54N/μm and 250N respectively. The wheel spindle radial motion error is 0.1-0.2μm.
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