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Roschen Global
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9 7/8” IADC 642
ROSCHEN
ROS-TCI-250
Product Description
TCI Tricone Drill Bit 9 7/8” IADC 642 for Mining
Product description:
Mining TCI Tricone Drill Bit 9 7/8'' IADC 642 with Tungsten Carbide Inserts
Code No. | ROS-TCI-250 |
Diameter | 9 7/8'' / 250mm |
Pin Type Dimensions | 6 5/8'' API |
Teeth Type | TCI |
IADC No | 642 |
Bearing | Rubber journal sealed bearings. |
Rotary Speed | 140~60 RPM |
Normal WOB | 0.35~0.95 KN/mm |
Nozzle NO | 3 |
Mining TCI Tricone Rock drill Bits or TCI roller cone bits
Mining TCI Tricone drill Bit Brief introduction:
High-strength and wear-resistant hard alloy teeth are used to improve the strength and wear resistance of the teeth.
The surface of high-precision bearings is heat-treated with advanced heat treatment technology, which improves the bearing capacity and service life of the bearings. The thrust bearing adopts high hardness and high wear resistance materials, which further improves the bearing life.
The anti-return valve structure has a dual function. When the air compressor stops working accidentally, it prevents air from flowing backward and dust and dirt enter the bearing. During normal operation, gas and water are separated to prevent water from entering the bearing, thereby increasing bearing life.
Product use and scope
Uses: This product is used for air drilling, such as the development of open-pit coal mines, iron ore, non-ferrous metal mines.
Scope of application: This product is used in hard and extremely hard formations with high compressive strength and strong abrasiveness, such as magnetite, quartzite, granite, hard sandstone, dolomite, vermiculite, iron ore, etc.
Rock formation | Bit type | Bit size | Drilling weight | Rotary speed | ||
mm | inch | kN/mm | r/min | |||
Very soft | Soft Marl, Clays, Sands, Salts etc. | 1 | 187.3~346.1 | 7 3/8~13 5/8 | 441~735 | 120~50 |
soft | Clays, Soft Shale, Marl, Sands, Salts etc. | 2 | 95.2~174.6 | 3 3/4-6 7/8 | 245-490 | 100-50 |
187.3~346.1 | 7 3/8-13 5/8 | 490-784 | 90-40 | |||
Medium soft | Shale, Marl, Sandstone, Soft Limestone etc. | 3 | 95.2~174.6 | 3 3/4-6 7/8 | 245-490 | 80-40 |
187.3~311.1 | 7 3/8- 12 1/4 | 490-784 | 80-40 | |||
medium | Hard Shale, Limestone, Medium/Hard Sandstone etc. | 4 | 95.2~174.6 | 3 3/4-6 7/8 | 294-539 | 80-60 |
187.3~241.3 | 7 3/8-9 1/2 | 539-833 | 60-40 | |||
medium hard | Hard Dolomite, Limestone, Hard Sandy, Rock etc. | 5 | 95.2~174.6 | 3 3/4-6 7/8 | 294-539 | 80-60 |
187.3~241.3 | 7 3/8-9 1/2 | 539-833 | 60-40 | |||
hard | Sandy, Shale, Quartzite, Hard Dolomite, Hard Sandstone etc. | 6 | 95.~-174.6 | 3 3/4-6 7/8 | 294-539 | 80-40 |
187.3-215.9 | 7 3/8-8 1/2 | 580-882 | 60-40 | |||
Very hard | Quartzite, Chert, Basalt Granites, Pyrites etc. | 7 | 95.2-174.6 | 3 3/4-6 7/8 | 294-539 | 80-40 |
Features:
1. The tricone drill roller bit working life is according the drilling formation and the drilling rig.
2. Rock formation: Very soft with low compressive strength and high drill ability, such as shale, clay, sandstone and conglomerate, etc.
3. Journal bearing. Hard faced bearing surface. Inner hole of cone is silver-plated. The load capacity and seizure resistance of the bearing is greatly improved.
4. O ring seal is made of the more wear resistant and high saturated buna-N with the increased seal section and precisely designed scaling flange in the cone sealing area has increased the reliability of the seal.
5. All rubber compensator is used which can limit pressure differential and prevent drilling fluid from entering the lubrication system and this provides the bearing system with good assurance of lubrication.
6. High wear resistance and excellent cutting ability of the insert bit are given full play by using carbide compacts of high strength and high toughness in combination with optimized compact numbers and rows, the exposure height and special shaped compacts. For steel booth bit, the tooth surface is hard faced with new type of wear resistant material and thus has extended working life of the cutting structure while still maintaining high ROP.
