What is the difference between end mill and drill bit?

Milling - HSS End Mills difference between end mill and slot drill First, different processing requirements: end mills are for milling, while drill bits are for drilling and reaming Although in some cases, the difference between port and slot Operation Milling, Drilling, Turning Material Aluminum, Brass & Bronze, Cast End Mill Diameter, in Spindle Speed, RPM, Machine Max Cutting Edges Chip

difference between t slot and v slot Continuation of regrinding milling cutters,this shows my own method of regrinding slot drills on