
Types of Down The Hole button bits
Flat Face Bit:
Face slots help eliminate bit plugging in softer zones. And more carbide is there for surface contact to ensure better rock fracture. It is a simple and robust design, well suited for medium to hard rock formation.
Concave Bit:
Suitable to drill in all formations. Cone shaped depression in face has centering effect for straighter holes. Well suited for soft to medium hard formations.
Convex Bit:
Fast penetration rates, face design allows for increased body support for gauge carbide. There are two gauges and the inner gauge row helps to protect the outer row from excessive wear.