| 摘要 |
PURPOSE:To enable a plurality of spindle holders to be radially, simply and accurately adjusted with respect to their position while enabling the spindle holders to be stably supported. CONSTITUTION:A guide member 10 is formed in the outer and inner peripheries on the upper surface of a disk-shaped guide member body 11 integrally with a pair of concentric projections 12, 13. The guide member body 11 is formed with four guide grooves extending radially at equal intervals. Drills 27 are attached to a spindle holder 21. The distance between the center of the attachment body 1 and the center of each drill 27 can be simply set by removing a lock screw 20 and replacing a locating member 19 for one having different diameter. |
