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. Wheel rotation should be smooth, the circumference should be flat, and large jump must be repaired.
When the outer edge of the drill bit is worn out, the blunt edge should be worn off, otherwise the drill sticking and sound will appear. When grinding, the pressure should not be too high, and often dipped in water to cool, to prevent overheating annealing and reduce hardness. Now there are advanced science and technology which can use full automatic drill bit grinding machine to complete this work. The drill bit grinder developed by our company removes the tedious work and can finish the drill grinding accurately in only three or four steps. Welcome to consult our products.