| 摘要 |
<p>A portable sander having an air motor with an output shaft driving an eccentric, parallel shaft on which an inverted cup-shaped casing is journaled for eccentric motion about the driving shaft. A pinion gear is fast on the motor housing around the motor shaft and meshes with a larger ring gear fast in the upper end of the casing to rotate the casing about an eccentric axis as it moves about the axis of the driving shaft. The casing carries a rubbing shoe to which a sheet of sandpaper is attached for contact with a work surface.</p> |
