When the twist drill is dull, it can be used to grind it, which is simple, convenient and safe!
Bit is a widely used tool for hole processing, such as twist drill, flat drill and center drill. It is the head of the drill that plays a cutting role, so it is very important to keep the drill sharp.
How to grind the drill quickly and sharply? Don't worry about grinding too much? In addition to memorizing formulas and practicing repeatedly, you can also use POPULO electric grinding drill-easy to operate, easy to learn, safe and secure!