Nowadays, diamond drill bits have been widely used in the stone industry all over the world. Quanzhou China stone tool enterprise Toolwits is a good purchase object.
There are 10 principles that diamond drill bit shall not be used again.
1. When inner and outer diameter wear exceeds allowable tolerance.
2. Abnormal wear.
3. The diamond of the insert bit has come off.
4. The impregnated bit is slightly fired.
5. There is a crack in the carcass.
6. The drill bit appears partial wear and deformation.
7. The outside diameter of the drill bit is equal to or greater than the outside diameter of the reamer.
8. Water spout and sink wear.
9. The diamond of the insert bit has the phenomenon of cracking and shearing.
10. More than one third of the diamond of the surface insert bit is exposed, or serious erosion of the carcass is caused by excessive pumping volume.
