Tag Archives: How to grind drill bit

March 13, 2019

Several forms of wear by which a drill bit is worn

The drill bit is semi-closed cutting, and the heat of drilling is difficult to spread outward, so it is easier to form a high cutting temperature. Therefore, the main cause of bit wear is thermal wear, for high-speed steel bit, mainly phase change wear. In addition, there are contact fatigue, excessive deformation, edge breaking, brittle […]

February 20, 2019

How to grind the worn bit by hand?

How to grind the worn bit by hand? First of all, we should observe the wear of the two main cutting edges of the drill. If the degree of wear on both sides is different, the wear on one side is slightly higher than that on the other. More attention should be paid to grinding. […]