Radius of the corner.
I am not sure that is correct. Milling insert codes are slightly different to lathe inserts.
To the best of my searching, the 02 or 04 in the code relates to the thickness of the insert.
OK so that cutter I purchased of indy EMP01-025-G25-AP16-02 cant use 1604 as they will be too thick?It is basically the same as lathe inserts, the first set of two digits are the cutting length, the second two the thickness and the last two the radius. In milling the 1602 and 1604 are just giving you the cutting edge length and the thickness often there are letters for the shape/radius of the corner, so to answer your question the difference is the thickness.
CorrectOK so that cutter I purchased of indy EMP01-025-G25-AP16-02 cant use 1604 as they will be too thick?
Why on earth are there hundreds of 1604 available and not 1602You need AP*T 1602 inserts, the * designates different tolerances so you could for example use APMT 1602 inserts instead of APKT 1602
Because 02 is a much weaker insert so an 04 is much preferrable.Why on earth are there hundreds of 1604 available and not 1602
But no good if they don't fit.....lolBecause 02 is a much weaker insert so an 04 is much preferrable.
Nope, but thought you said you had inserts for the tool?But no good if they don't fit.....lol
No weldon shanked, sod all numbers but as you can see a 0903 isn't far offAny numbers on it as it could be anything from the pics.