| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for improving the production efficiency of a screw shaft by surely and easily feeding oil to a plurality of places, while changing a stroke range of a ball screw device. SOLUTION: This ball screw device 1 is provided for threadedly engaging the screw shaft 3 forming a spiral shaft track groove 4 on an outer peripheral surface and a nut 5 forming a nut track groove 6 opposed to the shaft track groove 4 on an inner peripheral surface via a plurality of balls 2, and has a pipe hole 11 formed in the axial direction of the screw shaft 3, a plurality of plug holes 12 having an opening on the outer peripheral surface 3b of the screw shaft 3 and penetrating through the pipe hole 11, an oil feeding plug 15 having a jetting hole 18 jetting lubricating oil in the radial direction of the screw shaft 3, and an oil feeding tube 21 inserted into the pipe hole 11 and connected to the jetting hole 18 of the oil feeding plug 15. COPYRIGHT: (C)2008,JPO&INPIT
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