Thanks Ger,

I ignored the calculations at the bottom, because it kind of appears, that they have all ready done the calculations for you...

Ie - they stated an operating RPM of 18,000, they know the diameter and flute number, and they stated a feedrate per revolution, rather than chipload per tooth. so just using the RPM + Inch per Revolution I can see the recommended feed rate range straight away,and you are correct this does not correlate with the " calculated" number if you assume each burr is equivalent to a cutting flute.

I have to wait for some new tools to arrive in the meantime.... I might give them an e-mail.

Nick