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The article describes three types of gear teeth surfaces: smooth (envelope), striped (with combs) and scaled (with pyramids and combs connecting the pyramids). The method for combs and pyramids height (above an envelope) determination based on “velocity and acceleration of penetration” conceptions is introduced. Acceleration of penetration allows determining an actual workpiece surface deviation from a theoretical envelope without generating surface knowing. The computer simulations have been carried out, and the correlations between combs and pyramids height and gear machining parameters are exposed.

Macro-roughness height determination of teeth surfaces obtained by gear generating method