Abstract
The paper shows that maximum tool-life, or minimum temperature, for any given metal removal rate of a cutting tool or grinding wheel is governed by the principle of minimum thermal energy, resulting in one single relationship between metal removal rate per unit cutting edge length and tool-life, or temperature, for each tool - work combination. A tool temperature relationship, of the same form as the author's tool-life relationship, is derived, the constants of which can be calculated from temperature tests and two tool-life calibration tests.
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