Cool idea! I have taken pretty heavy cuts (about 1/4" depth) with a 1/2 spiral bit at around 200IPM cutting hard maple or cherry using a 2.2kw air cooled spindle. The machine barely got warm after 30 minutes of cutting (roughing out a 12" diameter, 3" deep bowl). I think the machine can take more. I was more worried that the wood would chip out more than would be removed on my finishing pass.