11/29/2023 0 Comments Mills hole in one slot machine![]() However back to those people who who want a 'flat bottom'( no pun intended) Leonard Sparey Did write vthe Amateur's Lathe( 1948 in which apart from his excellent references to external and infernal engines mostly of his design, he demonstrated how to modify an ordinary drill for this purpose. Today, hummmmm? I think that those people who are forced to attep such expedients should probably find another less expensive hobby. All oof this scrap hss tooling took a second life as boring tool mends. The world was full of Slocombe broken tips on centre drills and endless( in all ways) drills. Today, with cheap double ended grinders and tool and cutter grinders in abundance and the introduction of cheap(ish) insert carbides- I simply doubt the logic. ![]() It was fitted to a small boring head as a single lip cutting tool. There was NO tool and cutter grinder for the average little man to make. Click to expand.Many MANY years ago it was suggested in Model Engineer when a broken drill with one 'flank' had been shattered.
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