Shirttail Enhancemented Mining Drill Bits For Hard Rock Blast Hole
Drilling
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).
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.
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
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. A
professional producer, and supplier of Rock Drilling Bits, all the
bits crafted from the finest material available in today's market.
All of our bits 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).
