We run a lot of aluminum. We have issues with chips not breaking, especially in OD grooves, and all internal work (this is lathe work)
DCGT3251 CCGT2151 Kennametal turn-groove with GMP breaker.
A salesmen from a local Widia distributor came in today to show me a CCGT insert. We tried it out and can't get the chips to break.
Anyway, his company also distributes Becker PCD insertsl. I watched the youtube video and it seems pretty impressive. At ~$90/insert I can't buy one unless we're pretty sure it's going to break chips reliably. A good surface finish is important too.
The video:
Regards,
Robin