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3. Material selection and cutting speeds
3.1 Materials
The very wide range of cutting materials currently available means that choices have to be made. The importance of the tool/material pairing has been demonstrated by numerous recent studies
As a general rule, the machinist has little opportunity to influence the material of the part being machined. The tool, and consequently the cutting material, must therefore be the focus of attention.
Before deciding on the cutting conditions, the machinist needs to check the suitability (or qualification) of the cutting material for machining the workpiece material....
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Material selection and cutting speeds
General cutting conditions for milling
High-speed steel milling is mainly carried out with two grades (tables 1 , 2 ,
General cutting conditions for turning
In order to obtain stable and repeatable machining conditions, it is advisable to select the parameters depth of cut (ap) and feed per revolution (f ) within a range commonly referred to as the chip control zone. This zone is regularly truncated by a maximum cutting section (A D max) which must not be exceeded (figure
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