4. Cutting conditions

The introduction of the new coated tooling materials (TIN) used on standard machines has focused primarily on performance: less wear for a greater number of machined parts between sharpenings. On the other hand, the advent of numerically-controlled machines, with their much wider range of applications, has enabled these same coated tools to be used in more severe conditions, and to significantly reduce hobbing times.

The type of equipment used for conical hobbing is highly specific, so each manufacturer provides case-by-case charts and even software that enable the user to choose the optimum conditions of use, without the need for special fine-tuning research.

For your information, here are some very general trends taken from the Gleason recommendations.