Step drill bit is a drill bit with steps in outer diameter, an advantage of which is one drill bit can replace more than one common drill bits to drill two or more different diameter holes according to the needs, and large holes can be drilled at one time without changing the drill bit and drilling positioning holes.
There are many kinds of step drill bits: the steel step drill bit, the cone step drill bit, titanium step drill bit, cobalt step drill bit, etc.
According to the groove type of the product, it can be divided into three categories: straight groove, arc groove and spiral groove.
According to the number of flute, it can be divided into single flute, two-flute, three-flute, four-flute and multi-flute step drill bits.
In most situation, users customize the step drill bits as per the detail application.