There are many things that affect the sharpness of diamond coring. One major factor is the change in water flow that can retard the exposure of diamonds. Good diamonds, for instance, will erode even before they are worn out if the material being ground is extremely dense. Moreover, the erosion process can also be disrupted by softer materials and loosely bound aggregates. This leaves the edges of diamond core drill blunt and glazed. It is therefore very important that the operator should know the working principle of a diamond bit. Whenever the flaw happens and the bit ends up dull, he must know the proper way to address the problem.
The most popular option to correct the issue that ordinary people know is by sharpening. Is it really possible to sharpen a diamond core drill bit? If the drill bit is not really blunt, there is still that new layer of matrix-bonded diamonds just waiting to be exposed below the glazed layer. The dull, worn crystals have to be stripped away so that the new ones will be exposed to do the grinding task. As the worn gems are gone, the operator can now re-establish the erosion cycle. A special abrasive tool is needed to restore the erosion pattern. This tool must be packed in together with the drill so that it would be accessible to use every time.