| 摘要 |
PURPOSE:To make the lubrication of a feed screw ever so easy, by screwing a feed screw shaft, which is provided with a thread face on its external surface and installed with an oil hole in its inner part, on a nut provided with the thread face at its inner surface. CONSTITUTION:A feed screw shaft 6, provided with an oil hole toward its inner part from a shaft end part, extending the other end of the oil hole to a thread groove, is screwed in a nut 7 having a raceway track where a steel ball circulates. A plug for the oil hole and a bolt 12 doubling as rotation adjustment for the screw shaft 6 is removed, in time of lubricating, and grease or oil is injected into the screw shaft from a bolt hole. In time of oiling, when the nut 7 is shifted up to a part where the other end of the oil hole in the thread groove of the screw shaft 6 exists, the oil is penetrated into a thread face of the nut 7. |
