Based on the groove shape of the product, it can be divided into three categories: Straight groove, spiral groove, and arc groove;
Based on the number of cutting edges, it can be divided into single-edge, double-edge, triple-edge, four-edge, and multi-edge step drills;
Step drills are normally manufactured according to national standards, but in daily industrial use, most are custom-made non-standard products. Generally, manufacturers of step drills can produce them based on provided drawings.
