CAM setup for the flange plate

I have a couple of these end mills from SGS Tool (now branded as Kyocera SGS). Called "V-Carb 55SS Short", aka "Series 55":

They are recommended for steels, stainless steels, cast iron and high temp alloys, so should be good for my 304 stainless flange. And furthermore, they both appear to be in decent condition ie not buggered or chipped.

The reason for looking them up is to get the recommended cutting feeds and speeds:

For profile cutting with an 8mm cutter (2nd column), it looks like 3090rpm; for HSM (adaptive), 4665rpm and feed rate 26um per tooth (profile); 51um per tooth (HSM).

Double check that I understand correctly:

• 51um feed per tooth for 5 flute cutter at 4665rpm >> 1194 mm/min
• 26um feed per tooth for 5 flute cutter at 3090rpm >> 396 mm/min

Yes, that computes correctly. 

I don't understand this bit:

Ah:

So it means "keep Ap below 12mm for profile and 16mm for HSM" and "keep Ae below 2mm for profile and 0.4mm for HSM". It's difficult to see how I could keep Ae below 8mm when machining a slot. I guess this means that it's only intended for finishing, not roughing. Ooof yes:

So, possibly not the ideal choice here. What else have I got? I have some V7 INOX cutters from YG in 8mm with 0.5mm nose radius and necked shank with flat (Weldon) shank, p/n EME32906-1. Those are a bit exotic for this application but at least they are rated "excellent" for stainless steels including 300 series.

The data wasn't easy to find but it's held on a Hungarian YG site.

Here's the feeds and speeds table:

For 300 series SS, they recommend 3820rpm, 435 mm/min, Vc = 95 m/min and 28um per tooth. Again, sanity checking gives:

• 3820rpm x 28um x 4 flutes >> 427 mm/min. 
• And the surface speed resulting from 3820rpm and an 8mm cutter >> 96 m/min.

So that all checks out. Finally, for slotting, the depth should not exceed the cutter diameter. But I intend to limit the stepdown to around 2.4mm (30%), as the part will be hanging out over the end of the vice and will only be held on by a few tabs on the last pass.

Looks like a deal. I will dial those numbers back a bit, perhaps 15um per tooth (230 mm/min) and 3000rpm. With some stainless steels, running lower speeds and lighter cuts can cause work hardening but hopefully that won't be an issue here with a fairly modest reduction in F&S.

I'll also have to fill the coolant system again. It got a bit smelly, so I emptied and rinsed it out a few months ago.