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 104
me proficient in lapping their work with a proper assort-ment of varying thicknesses and shapes of laps will be sur-prised at the gain in time and the ease with which intricatecurves and corners may be finished, at the same time keep-ing the edges and corners sharp. As to the laps they may be of… … Fig. 86. True Taper Chuck softer lap, instead of allowing it to crumble and fly off;once forced or rolled into the lap, the material of which itis composed should be strong enough to retain its shape andthe powder or other abrasive material imbedded in its sur-face, under light and steady pressure…
Clocks and watches · Lathes
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