9. Length of Insert Cutting Edge
This final part of the code recognises the length of the inserts cutting edge that is being used in the tool. So using the example at the top of the article, it has 12 at the end which signifies a 12mm cutting edge length. These numbers will also match the first two digits that are used in an insert. So with the example at the top of the article we now know using points 2, 4 and 9 we can find the insert to suit that holder, In this case it would be SN**12 inserts.
So knowing the codes doesn’t just help you with the tool holders themselves but it also helps you find the inserts to suit. To the right is a chart showing the different cutting edges each insert has and what the lengths are based on: