The twist drill bit is the most commonly used cutting tool, the twist drill bit wants to be sharpened, so pay attention to some points below to:

For mechanical processing, twist drill bit is the most important of drilling tool, in all itsstructure simplicity,but it’s not easy to sharpen it right. The keypoint is to master the sharpening methodsand skills.If the method is mastered, the problem will be solved.Let me introduce the manual grinding of twist drill bit.

Usually, the point angle of twist drill bit is about 118°，it could also be treated 120°, the sharpening skills as follows:Continue reading→