| 摘要 |
The spindle position orientation apparatus of a boring machine includes a main spindle attached to a casing and around which a cylindrical cam is fixed, a slider disposed on a guide rod to be movable right and left thereby rotating the cylindrical cam, and a limit switch which is opened and closed by a dog attached to a piston. The piston is disposed in a hydraulic cylinder fixed to the casing, one end of the piston is fixed to the slider and the dog is formed on the other end.
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