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Volume Discounts Available
We now offer quick change cutters in sections! Cone styles are offered as TCI (Tungsten Carbide Insert)/Button or Tooth.
 Engineering bits are mounted on vertical well rigs, construction drilling machines, hole openers, or excavators and used for mining,
military industry, bridge and port construction, geological prospecting, hydraulic engineering and tunnel excavation.
Because of high mechanization, high penetration rate, good drilling quality, low labor intensity as well as safe operation,
the engineering bit is a primary product used for modern foundation construction.
Engineering bits consist of a cone, bearing, shaft, cap and sealing components.The bit cone rotates around the shaft and is mounted on a
saddle to form a drilling unit.
A special sealing system and a piston balanced structure filled with special lubricant are utilized to prevent the construction bit
bearing from permeation of sand,so as to improve the reliability of bearing system and prolong the lifetime of the construction bit.
Types and Parameters of 8 series
Size(mm) |
Insert Teeth |
|
Inner Row |
Gage Row |
A |
246 |
244 |
B |
198.6 |
198.6 |
C |
147 |
147 |
a |
12.5° |
12.5° |
b |
0° |
22.5° |
Applications |
Medium hard to hard formations |
Types and Parameters of 12 series
Size(mm) |
Insert Teeth |
Steel teeth |
| |
Inner Row |
Gage Row |
Inner Row |
Gage Row |
A |
386 |
355.5 |
413.7 |
373 |
371.5 |
B |
280 |
280 |
280 |
311.9 |
306.4 |
C |
224 |
224 |
224 |
224 |
224 |
a |
10° |
10° |
10° |
10° |
10° |
b |
0° |
15° |
30° |
0° |
30° |
Applications |
Medium hard to hard formations |
Soft to medium hard formations |
|
Types and Parameters of 15 series
|
|
|
| |
|
|
|
|
A |
453 |
544.5 |
447.7 |
544.5 |
B |
353 |
353 |
374.7 |
371.5 |
C |
340 |
340 |
340 |
340 |
a |
7° |
7° |
7° |
7° |
b |
0° |
33° |
0° |
33° |
|
Medium hard to hard formations
|
Soft to medium hard formations |
|
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