Re: need help purchasing my new okuma gen.560
hy dagem theory and catalogues will give you a number, while real trials will have the final word
image 1 : data that shows machining capabilities, in laboratory conditions
image 2 : spindle diagram
search for a table called "milling unit chart" or "milling hp unit chart" ( unfortunately,right now, i dont know exactly how it is called ) that will give you required hp to mill a mm^3 or an inch^3 of whatever material, in 1 minute
theoretical, with all this data, you should be able to estimate spindle load when machining with a random tool
... almost forgot it : direct drive randament : 95 %
... however, that chart, for which i dont know the name, contains data for dulled tools, so there is room for more pushing
also, shared images are not from an updated catalogue, since last offer for Genos includes a 15k spindle
when math will be done, real trials result may be pretty different
maybe somebody will share his cutting specs, just for you, to have an opininon, but there are guys that go hard, and there are guys that never go over x% of spindle load
thus, it is irelevant
try finding a real mill, somewhere if you wanna buy one, dealer may help you with a trial ... clamp hard a heavy part directly on mills table, thus to have no doubts about fixture vibrations, and start machining with a [o16 2D rough end] mill clamped in a [ short high power hydra holder ]
... maybe you will fall on your back
Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg