Educational....

As i have ordered some cutters from a reputable supplier now, I asked them what the recommended cut specs were for rpm, chip load and feed. They instantly sent me a nice chart with it all on, feeding the data into HSMAdvisor shows up where i was probably going wrong a bit :)

Things alter rapidly when you give the calculator the correct data - i was running too fast, too deep, too much chip. Adjusted specs for a 2mm single-flute carbide would be...
18,000rpm
2.5mm DOC
600mm/min feed

I recall when i snapped the 2mm on the weekend I had it set at something like 1400mm feed and 5mm DOC :)

Helps having correct data i guess.