> If this information from the dark ages is true, how ome carbide tool bits > are used on some milling cutters? Carbide has improved greatly from the days Al calls "The Dark Ages". I hate to admit it, but I am old enough to remember when carbide tools first appeared and we were warned to protect them from shock loads of any type. Now days, they seem almost indestructible and as you know, end mills and drills are made of solid carbide. Jesse in Tennessee USA MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.