CNC: Inserts ISO nomenclature – what’s important, and what’s not
To cut metal profitably, there are in fact only 3 parameters that you really need to understand to select the right insert for your application. These are the numbers marked in red in the above example. The others, like the insert shape and cutting edge length, are automatically decided based on the holder that you are using. In the table below, you have to use your brain only in selecting the parameters where there is a brain in the row.
This document has the details of each parameter in the name.
More (actually prior) reading Positive, Negative inserts Insert coatings – simple explanation
Pics. and Text source: CADEM NCyclopedia multimedia CNC training software.