Down The Hole Drill Bit

Currently there are four kinds of end face design forms: end face convex type; end face planar; end face concave type; end face deep concave center type. Carbide multi-select ball tooth. Spring tooth, or communal cloth tooth arranged by elastic claw and ball tooth.
end face convex type: two kinds of forms: single and double convex face.
latter is mainly used for large diameter dth drill. In drilling hard and hard abrasive rock maintain a high rate of drilling.
2. End face planar: this shape of the drill is more strong and durable, suitable for drilling hard and very hard rock. Also apply to drill hole straightness, not high request in hard rock and soft rock.
3. End face concave type: this shape of drill bit end has a conical hollow parts. Drilling bit in the process of drilling form a mild nucleation effect to keep bit’s performance. Drill hole has good straightness. Good bit row powder effect,fast drilling speed.
4.end face deep concave center type: this bit is in the shape of the same type ball tooth drill bit evolved. Nucleation effect in the process of drilling. Drill hole has good straightness. Good bit row powder effect,fast drilling speed. Only applicable to drill in soft rock and hard rock.