cutting steel you would end up with a spindle speed of only 1000rpm or less and a standard router would have almost no torque at this speed. Steppers or servos have their greatest torque at the lower speeds (usually). This is why most people use mills for metal work and not routers.
I think your probably looking at a 3mm cutter with no more than 0.5mm doc and many many repetitive passes with a very slow feed rate. Assuming your router table doesn't vibrate itself to death first. |