Specifications of concave drill bit

1. Concave drill bit use exclusive proprietary technology.

2. Concave drill bits are made with high quality of best quality alloy steel bar and tungsten carbides, through heat treatment

3. Concave drill bits can be mainly used in drilling aperture of 50-60mm, pressure of 0.7-1.2Mpa, rock hardness f≥12 hole.

4. High quality of drilling holes, high drilling speed

5. Concave drill bits can be regrind for several times and long life

 Feature of concave drill bit

(1) Type: concave drill bit  

(2) Diameter: 50-127mm

 (3) Bit design: concave/ drop center

(4) Thread diameter: 32, 38, 45, 51mm

 (5) Package: in wooden case or in carton

(6) Productivity: 20000pcs/ month

Parameter of concave drill bit

  Material of concave drill bit

Pictures of concave drill bit