AUTOMATIC FEED GEAR FOR BORING, TAPPING WORK ETC. BY USUAL LATHE

摘要

PURPOSE:To simplify boring and tapping work by inserting a round bar part of a center drill holder, as the captioned gear, in a hole for movement of a drill socket and performing automatic feed by a tool post of a lathe. CONSTITUTION:On an automatic feed gear for boring, tapping work and the like by means of a usual lathe, a guide cylinder part 3 of a drill socket 6 is provided on the large diameter side of a taper part 2 fitted to a taper hole of a loose head stock 10 of the lathe, and the drill socket 6 with a hole 5 for its movement is inserted in said cylinder part 3 of a main body 1. Then the front part of a square-shaped shank 11 fitted to a tool post 24 is formed into a round bar part 12 entering the hole 5 for movement of the drill socket 6, and a center drill hole orthogonal to the center line of the round bar part 12 is provided in a point of the bar part 12 or said shank 11. Subsequently, the edge of a center drill 15 is horizontally put into said center drill hole and drilled by means of a center drill holder 26 stopped by a center drill setscrew 14, and automatic feed for boring and tapping work is performed.