Erosion and Piece Missing from the Striking Face
Material and technique process of drill bit, condition of rocks, drilling rig operator all should be mainly responsible for drilling tools life. People may gain the maximum profit from the best control in each step. Among the most common causes of drill bit damage，Insufficient lubrication and feed force occur many times. It is significant to keep well lubricated at all times and adjust feed force.
| Description | Cause | Remedy |
| Piece missing from the striking face | • Erosion of the striking face | • Reduce the amount of water • Blow pipes clean before connecting the treads. Use thread protectors when possible. Keep threads clean and greased |
| • Corrosion or pitting | • Keep the hammer well lubricated at all times | |
| • Galling or metal to metal contact | • Keep the hammer well lubricated at all times • Protect the hammer and pipe from foreign particles | |
| • Metal fatigue, caused by insufficient feed force | • Adjust feed force | |
Erosion or pitting of the striking face | • Too much water injected into the air | • Adjust the amount of water |
| • Foreign particles passing the hammer | • Blow pipes clean before connecting the tread. Use thread protectors when possible. Keep the threads clean and greased | |
| • Worn face of the piston | • Exchange the piston or machine the striking face of the piston |
