I use several CNMG inserts and can use all 8 corners of the negative inserts by using two different style holders. I use Kennametal and Ultra Dex Kenloc style tools with Aloris tool holders. In Ultra Dex nomenclature MCLNR 16-4d, the L is using the 80 degree tip of the insert. MCKNR 16-4d uses the 100 degree tip of the insert. Last R is for a right handed tool. 16 is 1 inch width/height tool. The 4 is for a 1/2 inch insert, like 432.... Scroll down in the links.
Unfortunately, the smallest size is 12 which is a 3/4 inch tool. After wearing down or chipping the 80 degree tip on 4 corners, the same inserts can be used on the remaining 4 sides in the 100 degree tool. In this configuration they make a wonderful facing tool.
Edit > title should have said 8 corners of insert.

Unfortunately, the smallest size is 12 which is a 3/4 inch tool. After wearing down or chipping the 80 degree tip on 4 corners, the same inserts can be used on the remaining 4 sides in the 100 degree tool. In this configuration they make a wonderful facing tool.
Edit > title should have said 8 corners of insert.
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