The watchmakers' lathe, its use and abuse; a story of the lathe in its various forms, past and present, its construction and proper uses (1903)
Goodrich, Ward L. [from old catalog] · Chicago, Hazlitt & Walker · leaf 166
Fig. 127. Fig. 128. The grinding of the cutting edges must be done withgreat accuracy, and to do it properly by hand requires con-siderable experience, so that drill grinding machines arenow generally found in all modern machine shops. Thecutting edges are usually ground to an angle of 60 degreesto…
Clocks and watches · Lathes
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