A chamfering knife can be used for dotting. When the chamfering knife is used, it vibrates and the machine stops immediately and cannot continue cutting. Adjust the hanging wheel until the chuck can be turned by hand, then slowly rotate in the opposite direction to exit the tool tip. Chamfering cutter (chamfering cutter) generally refers to a countersink drill, which is a countersunk drill, also called a chamfer cutter, chamfer drill, dimple drill, chamferer, a drill used to countersink conical countersunk holes. To deburr, chamfer, and dig countersunk holes, the premise is that there must be a guide hole before subsequent processing can be performed. To place tapered flat head screws, you need to process countersunk holes and tapered holes. Orifice trimming and deburring means lightly trimming the edge of the orifice and removing the ripples on the edge of the orifice. Countersinks are divided into cylindrical countersinks, tapered countersinks, inclined hole countersinks, guided column inclined hole countersinks, end face countersinks and other shapes.