Indexable insert types - photo

[Toolmaker51]

I kind of like the graphics on this one but it is only one manufacturer and it is limited. As noted above they all tweak it a bit and there is no agreement on carbide grades and coatings. One distinction is interrupted cuts (like milling) or constant force (like turning). Many seem to offer both grades. If you have a sleep disorder try Kyocera's catalog! :-)

And Kyocera is a primer for Iscar and Kennametal.........
I think the variety of inserts configurations chart presented by Altair in Post *1 is a good starting point. You'll soon notice holes in the patterns displayed for such as VNMG's and variety of point angles, or the 6-sided triangle WNMG's.
One trick identifying inscribed circles hides in your 'tool club' drill gauge.
I have few inserts, arranged in same chronological order as insert catalog. Doesn't matter which one or brand, just a simple means of reference. I use form ground HSS or cemented tools 90% of the time, 60° & ACME threads, O-rings, necking & grooving, chamfers, fillets & radii, corner reliefs etc. Inserts don't get attractive unless trepanning, deep parting, or running exotic materials.

None the less, insert designers are clearly evil spawn of printer cartridge designers.