We use drill bits many times, and the drill bits used in different situations are different, and the HSS cobalt drill bit is also a kind of drill we often use. So what should we pay attention to when using drills?
Re-grinding the drill in a timely manner can increase the use and regrind times of the drill, extend the life of the drill, and reduce production costs and expenses. Usually measured with a tool microscope, the wear depth should be less than 0.2mm within the full length of the two main cutting edges. When regrinding, 0.25mm should be removed. Ordinary fixed shank drills can be reground 3 times, and undercut drills can be reground 2 times. Too much grind will reduce the quality and accuracy of the drilling, which will cause the finished circuit board to be scrapped. Excessive grinding effect is counterproductive.
When ordering the manufacturer’s drill bit, 4% of the drill bit shall be randomly inspected to see if it meets the requirements. And 100% of the nicks, scratches and cracks are inspected with a microscope of 10 to 15 times.
And wood auger drill bit manufacturers also need to be tested, so they are still very secure when used. www.jeejatools.com