For drill bits, especially those frequently used drill bits, such as wood auger drill bit , the later polishing and maintenance are very important.
The sharpening quality of the drill bit affects the drilling accuracy and the working ability of the drill bit. If the symmetrical configuration of the drill bit edge (or guide center) relative to its axis slightly deviates, it will cause the deflection of the drill bit during the working process. Decrease drilling accuracy. The sharp angle of the cutting edge of a drill depends on the quality of sharpening, material properties, and the geometry of the cutting part of the drill.
The correct drill sharpening should accurately maintain the angle value of the cutting elements and their mutual configuration. After sharpening, the end face of the cutting edge swings <0.08mm, and the allowable angle parameter deviation is ±2°. Burns, peeling, etc. are not allowed on the sharpened surface. The sharpening of the drill can be done with a grinding wheel or a hand file.
For the HSS cobalt drill bit , be more careful when grinding, because HSS has higher requirements for the drill bit.