Abstract
This paper refers to tool life tests on sintered carbide inserts for face milling and turning in interrupted cutting. Similar tool and workpiece geometries, cutting conditions and insert quality were employed for the tool life tests. The inserts exhibit similar behaviour, in two different working processes, at the low cutting speed, but not at the higher speed. Particularly at low cutting speeds, a ratio between tool life in face milling and in turning can be demonstrated which is independent of feed. At the high cutting speed, however, phenomena related presumably to cobalt diffusion can give rise to a similar variation in tool life, but at a different range of feed. With the given cutting parameters, a longer tool life was observed for face milling than for interrupted turning, under similar cutting conditions.
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