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 236
-ing a thin lap in the lathe chuck and holding the staffbetween the centers of the rounding-up tool these faces maybe nicely polished or by a little manipulation they may beslightly rounded if desired. The work is done easily, quick-ly and in the proper plane if due care is taken in setting thelap… … 236 THE AMERICAN LATHE. Very thin laps should be used so that each end of theanchor may be swung against the lap without resetting theattachments. If the pallets are stone the lap should becharged with diamond powder and they may be polishedwithout change of lap if the diamond powder be uniformand…
Clocks and watches · Lathes
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