GB550137A - Improvements in or relating to lathe attachments - Google Patents

Abstract

550,137. Lathe attachments. MOGFORD, R. A. E. June 17, 1941, No. 7673. [Class 83 (iii)] A centre lathe is provided with a table or face-plate 1 mounted on a saddle 2 and having a central orifice 3 to guide and steady the work, and also means on the plate to support cutters, knurling rollers, or other tools for operating on the work adjacent the guide orifice. The saddle moves on a bar bed 4 and the plate carries on the headstock side a slide 5 fitted with a tool 6 arranged to turn oversize stock down to the size of orifice 3, which comprises a split taper bush 9, Fig. 3, forced by a screw plug 8 into a coned member 7 secured to the plate 1. In a modification the split bush is spring-urged and is mounted in a member which is free to rotate in the plate on ball bearings. On the side remote from the headstock the plate carries a forming tool 17 on a slide 13 fed by a hand lever 16, a parting tool 18 on a slide 14 fed by a hand lever 19 and a knurling tool 15 operated by a spring-loaded lever 20. After parting off each work piece, the saddle is advanced towards the headstock in steps until the chuck is reached. The saddle may have either hand or automatic feed. A lubricating pad may be mounted on the headstock side of the plate to bear against the stock and reduce its tendency to stick in the collet.