| 摘要 |
<p>The base (1) bears vertical lateral frames (9, 10), each containing a bearing (11 or 12) provided with ball or needle rolling bearings which are protected by seals (13) and covers (14), these bearings supporting a shaft (15) provided with two zones of splines (15a, 15b) in order to permit the fixing onto a shaft (15) of a cylindrical element (25) carrying arms (26, 27) supporting the table on which the workpiece is placed, the shaft (15) being extended by a disc (16) having, on the one hand, on its periphery a circular recess (17) interacting with a finger (20) in order to limit the displacement of the table to 90 DEG , pierced holes being provided in the disc (16) in positions diametrically opposite the ends of the housing for ensuring the locking of the table (28). <IMAGE></p> |
