Difference 1. Different uses

Milling cutters are mainly used for machining planes, steps, grooves, forming surfaces and cutting workpieces on milling machines;

The drill bit is one of the important tools for oil drilling and is generally used for drilling.

Difference two, different categories

The milling cutter is divided into sharp tooth milling cutter and spade tooth milling cutter; drill bit is divided into diamond bit, roller bit and scraper bit.

A milling cutter is a rotary tool with one or more teeth for milling. When working, each cutter tooth cuts off the allowance of the workpiece intermittently in turn.