American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 260
This is done by approaching to it a thincutting-off tool, drawn forwardby hand to a stop Avhich cuts itnearly off (Fig. 7). This stageof its progress brings! t to anotherand important adjunct of thescrew-making machinery, whichis the slitting disk. This is simply two steeldisks, a (Fig. 8), of…
Clocks and watches
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