Some of the "sofa" experts say that pobeditovye drill sharpening does not need. I partly agree with this opinion, but still - still sometimes need to sharpen.
For the experiment, drill a hole the old pobeditovym drill, and after a number of drill hole is the same, but the new, recently purchased or sharpened. at once You feel a huge difference.
win - it's pretty hard alloy consisting of 90 percent of tungsten carbide and 10 percent of cobalt (As a binder), and a very small amount carbon. Therefore, I make pobeditovye sharpening drills on sandpaper with a diamond wheel.
In this drill, namely pobedita sharpening angle of about 120 degrees. But how to sharpen, observing it? For these purposes, you can quickly produce simple enough device of the board or the bar in the form of a triangle. Exemplary devices diagram below.
Then simply insert the drill bit into the device and move it to the revolving disc. But there are some subtleties:
- pressing of the disc should be minimal;
- after one - two clamps drill it is necessary to cool the containers with water. In no case can not overheat it, as pobeditovye soldering in such a case, just start to crack and crumble. The drill will be spoiled forever.
Here in this unhurried pace sharpen drill to the desired state.
Be sure to check the sharpening disc itself on palpation, or also risk damage the drill.
And finally, I will say a few words on the technique while working security. Now once he presented as a changed person from some readers, saying, "Whom are you going to teach, bonehead ..")) But still - still voiced, will not be superfluous.
Carry out work on sharpening the need to wear safety goggles in tight-fitting clothes. Long hair, if anyone - that there are any, should be tucked under a hat. In any case it is impossible to carry out these works in gloves or mittens, avoid engaging them with an abrasive wheel or other spinning parts.
By following these rules, you run the grinding work quickly, efficiently and without various injuries.