concave drill bit

Brand:aa

Product detail:

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

Item	Material
T45 thread button bits	45CrNiMo1V
T45 thread button bits alloy head	Yk05
Mf rod	22 CrNi3Mo
Bench drill rod	22 CrNi3Mo
Shank adapter	30CrNi4Mo and 18 CrNi3Mo
Pneumatic picks tools	T10
Extension rod	35SiMnMo
Small hole drilling tools	55SiMnMo and 95 CrMo

 

 

Pictures of concave drill bit