Rock Tools Kenna Conical Coal Mining Drill Bit Bullet Tooth
Tungsten Carbide Particles: We only use the highest grade tungsten
carbide as raw material for tool tips. The crushed raw material
dual grain structure tungsten carbide offers high abrasive
resistance.
Tungsten Carbide: The carbide raw material is pressed and sintered
to produce high-quality dual grain structure tungsten carbide that
has incredible we properties plus high wear resistance.
Steel Body: we are using 42crmo alloy steel, one of the highest
grade of steel material. It has a hardness of up to 42-55 HRC which
offers strength to the tungsten carbide tip.
According to different purposes, drill bits are classified into
cemented carbide bolting drill bits and PDC bolting drill bits
applied to coal mining and laneway and tunnel supporting grid, PDC
solid drill bits applied to coalfield geological condition and gas
drainage, water injection and drainage down coal mines, and PDC
non-solid drill bits applied to coalfield and geological
exploration.
| Application area | Teeth type | Teeth Sharp | Teeth code | Application condition |
| Engineering construction | Pavement milling machine teeth | Cap | PM | Asphalt road |
| Colume | PZ | Cement road |
| Rotary Digging machine teeth | Rotary teeth | WG | Construction &Building |
| Tunnel boring machine teeth | Driving teeth | YJ | Hard rock tunnel |
Milling tooth
Parameter: Cobalt 6,Coarse grain size,Hardness in 97.9HRA,Density
14.95cm3;Bending strength 2400n/mm2,
Cap (Model:SDB10P,asphalt pavement)
Column (Model:SDB20P,cement pavement)
Rotary tooth
Parameter:Cobalt 8,Grain size 8 (extra thick),Hardness in
85.5-86.5HRA,Density 14.6-14.8cm3,
Bending strength 2000n/mm2,Coercive force 38-60,Relative magnetic
saturation strength above 88%
10W alloy(Model:SDB10W,Compressive strength within 100 MPa)
20W alloy(Model:SDB20W,Compressive strength within 120 MPa)
Driving tooth
Parameter:Cobalt 10, Coarse grain size,Hardness in 86.0HRA,Density
14.45cm3;Bending strength2400n/mm2,
Model:SDB10J
Performance:Suitable for hard rock, hard rock tunnel in granite,
quartzite, marble, gneiss and other super hard rock)
Parameters of coal mining drill bits/coal cutting pick
| Product number | Pick length (mm) | Length of head (mm) | Pick hanldle diameter (mm) | PDC insert diameter (mm) | Pick head diameter (mm) |
| U82 | 152 | 80 | 30 | 14 | 50 |
| U84 | 142 | 70 | 30 | 16 | 50 |
| U85 | 161 | 85 | 30 | 14 | 50 |
| U92 | 195 | 101 | 35 | 16 | 55 |
| U94 | 183 | 90 | 35 | 19 | 55 |
| U95 | 182 | 88 | 35 | 24 | 55 |
| U170 | 215 | 89 | 43 | 22 | 64 |
| D47 | 140 | 65 | 30 | 23 | 50 |
| D120 | 143 | 68 | 30 | 16 | 55 |
| D135 | 155 | 80 | 38 | 19 | 63 |
