| 摘要 |
1285707 Machine tool details G N DRINKWATER & SON Ltd 6 Oct 1969 [9 Oct 1968 30 May 1969] 47774/68 and 27466/69 Headings B3C and B3T Means for mounting a centering drill 13 on a lathe live centre 1 comprises a body 8 having arms 6, the latter being secured to the centre by screws 5 and elongated slots 9, so as to allow the conical end of the centre to co-operate with a similar recess in the body, when in the operative position, and to be pivoted so as to disengage the cone and recess. Drill 13 is held in the body by a grub screw 11, and a stop 14 is provided to assist in positioning the body. In a modification, the body has integral arms, and springs are provided between screws (19), and pins (17), Figs. 7, 8 (not shown), so as to tension the body into engagement with the cone. The body may be secured to a ring by screws 5, and the ring is adapted to fit over an existing lathe. |
