Verified Company
Zhengzhou Yukun Machinery Equipment Co., Ltd.
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Specification of coal mine drill bits
1) Coal mine drill bits are made with best quality alloy steel bar and tungsten carbide buttons, through special heat treatment.
2) Coal mine drill bits are suitable for all kinds of rock—Soft rock, loose-medium rock, hard rock and any other special formations.
3) Coal mine drill bits are divided into planar and concave heart-shaped, easy return type, easy to return to the concave heart-type.
4) Our coal mine drill bits are exporting to Middle East, South Africa, Europe, South Asia, Southeast Asia, etc.
Feature of coal mine drill bits
(1) Type: coal mine drill bits
(2) Diameter: 51-127mm
(3) Bit design: flat, flat retrac, drop center, drop center retrac
(4) Thread diameter: 32, 38, 45, 51mm
(5) Package: in wooden case or in carton
(6) Productivity: 20000pcs/ month
Parameter of coal mine drill bits
Quick details of the carbide design of coal mine drill bits
All thread bits are available in various flushing hole configuration.
In general, the rule is that Semispherical type bit design are applied to very hard rock. Ballistic type to medium hard and Conical type to soft rocks.
Bit design | Brief Introduction |
Drop center |
Perfect in abrasive formations where there is accelerated button wear or in medium to hard rock when ballistic buttons have tendency to break.
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Drop center/retrac |
To be used in medium-hard and fissured rock formations, better hole deviation control.
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Flat front
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Ideal for medium hard rock when the rock formation causes heavy gauge wear on the bit. Can also used in very hard and abrasive rock formations.
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Flat front/retrac |
To be used in the same applications as flat/front/spherical buttons/standard skirt when you also create hole.
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Pictures of coal mine drill bits