Page "learned" Paragraph 1293
from
Brown Corpus
Under equilibrium cutting conditions, the chip exerts a force Af against the coating and an equal opposite force Af against the knife in the plane of the substrate as shown in Fig. 6.
If the rake angle **yc of the knife is high enough and the friction angle **yt between the front of the knife and the back of the chip is low enough to give a positive value for Af, the resultant vector R will lie above the plane of the substrate.
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