Quote Originally Posted by routercnc View Post
Cutting 1000 grade thin sheet tend to gum up the cutter. It’s almost pure aluminium. Then it stops cutting and the spindle stalls and the end mill breaks. 6061 alum alloy is better but if the bit gets hot again it can gum up. Mist or flood cooling minimises this risk but it gets messy.
Well, I'm still bemused. If it's the cutter that stalls the spindle then it has to take all the momentum of the spindle to stop it so the instantaneous torque on the cutter must be much larger than the motor torque. As I said The motor hasn't stalled any time I've broken a cutter. Anyway it will be good to hear of your experience with the system - will you be doing some controlled experiments?