Cost Effective Cemented Carbide Insert Mining Drill Bits For Mining Industry
Click here for catalogueTCI DRILL BIT.pdf
All bits the above are manufactured according to strict standards, set forth by the American Petroleum Institute (API).
And classified according to characteristics set forth by the International Association of Drilling Contractors (IADC).
IADC745 Is For Drilling Hard to Very-Hard Formation
The hard formation TCI tricone bits features robust chisel tungsten carbide inserts on the heel row and conical on the inner rows.
This design provides a fast drilling rate and added cutting structure durability in medium to medium hard formations.
The HSN rubber O-ring provides adequate sealing for bearing durability.
Application : For use in abrasive consolidated formations with compressive strength above 400 Mpa such as taconite, quartzite and banded iron formations
Cutting structure: These bits are characterized by closely spaced conical or spherical inserts with medium to low projection. This configuration promotes good penetration rates in hard, consolidated and very abrasive formations. Smaller carbide inserts are provided on the gage and inner rows or hard metal is deposited in the nose area to contain shell erosion and improve performance.
- Compression Strength: 60,000 – 100,000 psi
- Drilling Speeds: 50 – 90 rpm
- Jet Circulation: All sizes
- Weight on Bit (WOB): 4,000 – 7,500 lbs/in of bit diamete
How to read an IADC Code properly
| First Digit | TOOTH |
| 1 | Steel tooth bits for Soft Formation |
| 2 | Steel tooth bits for Medium Formation |
| 3 | Steel tooth bits for Hard Formation |
| 4 | TUNGSTEN CARBIDE INSERT BITS
For varying formation hardness with 4 being the softest and 8 the hardest. |
| 5 |
| 6 |
| 7 |
| 8 |
| Second Digit | FORMATION |
| 1 | 1,2,3 and 4 are further breakdown of formation with 1 being the softest and 4 the hardest. |
| 2 |
| 3 |
| 4 |
| Third Digit | BEARING/SEAL TYPE |
| 1 | Standard open bearing roller bit |
| 2 | Standard open bearing roller bit, air-cooled |
| 3 | Standard open bearing roller bit with gauge protection |
| 4 | Sealed roller bearing bit |
| 5 | Sealed roller bearing bit with gauge protection |
| 6 | Journal sealed bearing bit |
| 7 | Journal sealed bearing bit with gauge protection |
| Fourth Digit | ADDITIONAL FEATURES |
| A | Air application |
| R | Reinforced welds |
| C | Center jet |
| S | Standard steel tooth |
| D | Deviation control |
| X | Chisel insert |
| E | Extended jet |
| Y | Conical Insert |
| G | Extra gage protection |
| Z | Other insert shape |
| J | Jet Deflection |
What is Mining Drill Bit consists of?
- A Mining Drill Bit consists of a bit body with three moveable conical rollers equipped with cemented carbide inserts.
- The idea is the crush the rock by rolling the inserts against the rock with appropriate rotation speed and feed force.
- Carbide inserts are distributed over the three rollers in such a manner that the entire bottom of the hole is worked on when the drill bit is rotated.
- Roller bits for hard and abrasive rock generally have spherical cemented carbide inserts closely spaced.
- Roller bits for softer rock may have the chisel and conical carbide teeth or quality milled steel teeth as the cutters.
- Three types of cemented carbide inserts are used for roller type bits being Chisel, Conical, and Hemispherical.
- A roller bit will utilize nozzles from which the compressed air escapes to lift the cuttings from the bottom of the hole.
Bits thread are manufactured according to API standards.
| BIT SIZE | BIT WEIGHT | THREAD TYPE(API) |
| 7 7/8” (200mm) | 36KG | 4 1/2” REG |
| 9 7/8” (251mm) | 67KG | 6 5/8” REG |
| 11” (280mm) | 76KG | 6 5/8” REG |
| 6 5/8” (311mm) | 100KG | 6 5/8” REG |
Advantage:
- Tianying rock roller bit feature an improved cutting structure, with wear and fracture resistant tungsten carbide inserts, designed to maximize penetration rates.
- Bearings are refined and strengthened.
- Rock drilling bits are carefully engineered to maximize productivity and lower total drilling costs.
Main Products We Provide
We mainly provide Tricone Bits(Rock Drilling Bits), DTH Bits and PDC Bits for mining rock drill , water well drilling and oil well drilling.
Don’t see the bit you are looking for? Give us a call, we can customize any bit to fit your unique circumstances.
1). Tricone Bits:
a). Type: Tungsten Carbide Insert (TCI)
b). Formation Application: Soft to Hard Formation
c). Size Available: 3''~26''
d). Popular IADC Code: IADC545,645,725,735,745,825,835
2). DTH Bits:
a). Type: Tungsten Carbide Insert (TCI)
b). Formation Application: Soft to Hard Formation
c). Size Available: 2.8''~26''
d). Popular IADC Code: IADC117/137, 217/237, 317/337, 417/437, 517/537, 617/637
3). PDC Bits:
a). Type: Matrix Body and Steel Body
b). Formation Application: Soft to Hard Formation
c). Size Available: 3 1/2''~26''
d). Popular IADC Code: 121/122/123, 221/223/224, 323/324/332/333/334/343,
423/424/432/433/443
Our Company
Hunan TianYing Drilling Machine Manufacturing Co., Ltd. was founded in 2003, located at Zhuzhou, China, the word famous tungsten Carbide production base. We are a professional producer, and supplier of Rock Drilling Bits, all the bits crafted from the finest material available in today's market.TCI(Tungsten Carbide Insert) types are our main products, available in many sizes, designed for soft to very hard formations. With years of study and refining, our Rock Drilling Bits are preceded by extensive R&D, field tested, and backed by our unmatched commitment to service and support, our products exported to all over the world, such as Australia, North America, Middle East, North Africa and Southeast Asia etc. Today, Tianying's products have been favored and respected by domestic and foreign customers. We will continue to serve our customers with high quality products, excellent service and reasonable price.
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