Hi,

I'm wondering what would happen if you were tun run say a 3mm endmill at a really high speed, for example 50,000RPM using one of these: http://www.gison.com.tw/product/P000...4,000-rpm).htm

I know that higher speed means faster possible feedrates, but where's the limit ?

These air spindles have a high speed but a low torque, so if the endmill is spinning this fast it doesn't have to cut as much material away per revolution. (At a standard feedrate.)

So basically I'm asking what implications are there for running a 3mm endmill at 50,000RPM ?

If there are any problems, what is the maximum speed that a 3mm endmill could be used ?

Thanks,
-Andrew.