摘要 |
<p>A power cylinder for operating a chuck for a machine tool has a rotary cylinder casing (1, 6), a pair of check valve (7a, 7b) for shutting up a pressure fluid in an operating chamber (R), accumulators (26a, 26b) for absorbing impacts of the pressure fluid, and detecting means (45a, 45b, 42b, 48) for detecting the fluid pressure in the operating chamber (R). The power cylinder can be rotated in a state wherein the feeding and discharging of the pressure fluid is stopped.</p> |