Cutting Structure Design

Chisel Bits

Cross Bits

Button Bits

Bit Diameter

26~43mm

28~51mm

28~45mm

Tapper Degree

7º,11º,12º

Chisel Bits

Cross Bits

Button Bits

Taper Degree

7º

7º, 11º and 12º

7º, 11º and 12º

Bits Socket Diameter

mm

23

23

22

inch

27/32

27/32

7/8

Bit Diameter

mm

26 ~ 43

28 ~ 51

28 ~ 45

inch

1 1/32 ~ 1 45/64

1 7/64 ~ 2

1 7/64 ~ 1 25/32

Remark

There are horseshoe and oblique chipways designs;
To drill media hard, hard and crack not grown formation with rock hardness not above f15 and in place where the compacting power of the rock drill doesn’t exceed 8Kg/MPa

To drill hard, very hard and crack grown formation

There are short skirt, average long skirt and enhanced long skirt;
with hemi-spherical or parabolic inserts configurations;
to drill all rock formations except very hard and abrasive formations

Notes:

1. Special sizes may be available upon request;

2. Choose big and high carbide bits, when work with high impact rock drills, to improve anti-percussive capability of the inserts;

3. Work with soft formation, use extreme hard carbide inserts bits to get high penetration; while work with hard formation, use sub-hard carbide inserts bits to avoid inserts breaKing; work with erosive formation, use anti-resistance alloy carbide inserts;

4. The taper degree of the bits must be the same as the taper rods that it is planned to work with.

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