How to sharpen a twist drill?
2021 12/29
The cutting edge of the bit is placed on the same plane as the grinding wheel. Only after the position is set can it slowly approach the grinding wheel, grasp the right Angle, and grind from the main cutting edge to the back, moving slowly down along the rear cutter face. First, a small amount of grinding should be carried out to observe whether the spark is uniform and adjust the pressure generated at any time. Also pay attention to the need to cool the drill, can not let the temperature is too high, once found that the temperature is relatively high, the need for timely watering cooling.