Sounds like your taking too much off. Plus its a router not a milling machine so when your cutting aluminum its not the same as wood, I would also have an airline attached near the spindle to blow chips out. Whats probably happening is the bit spinning so fast its gumming up the cutter and your feed seemed slow. When milling aluminum on the Bridgeport I,ll usually run the speed about 750rpm and I,m blasting air on it the whole time. When we run alum in the VMC's they get blasted with flood coolant especially when drilling and they usually mill at about 2-3000 rpm with a pretty quick feed. Of course these machines weigh tons. I assuming your using a router that would normally cut wood or plastic. I would definetly use air on alum at least and coolant when drilling. I tried to find the link to one of the milling cutter manufacturers, they have a whole pdf telling the correct speeds and feeds in relation to the materials, I,d check different cutter manufacturer websites and see if they have that chart.  |