Hi,
it depends on the size of the tool and the chipload.
If you spindle is a highspeed/low torque spindle as is common then then toolsize will be limited by the torque.
For example:
power= torque x speed
speed =24000 (rpm) x 2 x PI /60
=2513 rad/sec
torque= 3000 (Watts)/ 2513
=1.1Nm
It will not take a great deal to stall a spindle with only 1.2Nm of torque. You'd probably be limited to tools 8mm diameter or less.
Imagine however if you have a 3kW AC servo as a spindle motor with rated speed of 3000rpm:
torque = 3000 /(3000 x 2 x PI /60)
=9.5 Nm
Now your talking, you could spin a 20mm or 25mm tool with that sort of torque.
Craig