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 152
the main body. The thinnerthis wedge is the less is the power required to drive it in.The tool or material should be driven at the speed which isthe most effective, so that the work will be accomplished inthe shortest time. The speed is only limited by the heatingand softening of the cutting edge,… … Fig. 120. tool which is to be used for heavy cuts, such as a machinistwould have to take, must have sufficient metal in it near thecutting edge to resist the heating and consequent softening,so that the heat may be carried away rapidly. When takinga heavy cut, a liquid of some kind is employed,…
Clocks and watches · Lathes
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