09-02-2015, 11:03 PM
Ron,
The "ZZN" designation means they are essentially a sharp corner albeit with a .002" (0.05mm) flat that is parallel to the milling plane. The choice of using the ZZN relates to the F2280 and F4080 cutters have a 43º lead angle. If it was a true 45º, that designation would be ANN, and if the cutter was an F4047 with a 75º lead angle the inserts would be ENN and so forth. Check page F6 if you have the current General Catalog 2012.
In my experience I've used the radius corner ones on my F4033 cutter, SNMX120512-F57 and find that while the radius corners are stronger and can take a little more abuse, the finish is better with that little wiper flat on the SNMX1205ANN-F57 inserts I have.
Hope this helps.
Ken
The "ZZN" designation means they are essentially a sharp corner albeit with a .002" (0.05mm) flat that is parallel to the milling plane. The choice of using the ZZN relates to the F2280 and F4080 cutters have a 43º lead angle. If it was a true 45º, that designation would be ANN, and if the cutter was an F4047 with a 75º lead angle the inserts would be ENN and so forth. Check page F6 if you have the current General Catalog 2012.
In my experience I've used the radius corner ones on my F4033 cutter, SNMX120512-F57 and find that while the radius corners are stronger and can take a little more abuse, the finish is better with that little wiper flat on the SNMX1205ANN-F57 inserts I have.
Hope this helps.
Ken