| Type | D | H |
|---|---|---|
| YP08.207-F | 8.20 | 7.50 |
| YP09.808-F | 9.80 | 8.00 |
| YP11.109 | 11.34 | 8.80 |
1. Product Overview
Zhuzhou Jinzhou Carbide manufactures high-performance serrated flat-top tungsten carbide inserts, commonly known as “fluted teeth,” specifically engineered for tricone drill bits used in hard, dense, and challenging rock formations. The serrated or fluted design features a flat top with multiple raised ridges or grooves that create aggressive ripping and gouging edges. This unique geometry combines the gage retention and wear resistance of a flat-top insert with the enhanced rock fracture capability of multiple cutting points. As the tricone bit rotates, the fluted teeth penetrate and rip the rock surface, initiating fractures along multiple lines while the flat base ensures even wear and consistent hole diameter. Manufactured from premium ultrafine-grain tungsten carbide through advanced HIP (Hot Isostatic Pressing) sintering technology, our serrated inserts deliver exceptional penetration rates, extended service life, and reliable performance in the most demanding hard rock drilling environments. They are widely used in oil and gas exploration, deep mining, geothermal drilling, and hard rock construction projects.
2. Key Features
Serrated Cutting Action: Multiple raised ridges on the flat top create aggressive gouging and ripping edges that fracture rock more efficiently than smooth flat tops.
Enhanced Penetration Rates: The fluted design enables faster drilling speeds in hard, dense formations compared to conventional flat-top or spherical inserts.
Superior Gage Retention: Flat base profile maintains consistent hole diameter and reduces gage wear throughout the bit’s service life.
Exceptional Wear Resistance: Premium tungsten carbide composition with optimized binder content ensures long service life even in highly abrasive rock strata.
Multiple Fracture Initiation Points: Each ridge acts as an independent cutting edge, creating stress concentrations that promote rapid rock fracture.
Excellent Impact Toughness: Engineered with appropriate cobalt content and grain size to withstand severe shock loads encountered in hard rock drilling.
100% In-House Quality Control: Comprehensive testing for hardness, density, and dimensional accuracy from powder to finished insert.
Customizable Options: Serration pattern, number of flutes, and grade can be tailored to specific rock types and drilling parameters.
3. Specifications
| Parameter | Details |
|---|---|
| Material | Tungsten Carbide (WC-Co) |
| Insert Shape | Serrated Flat Top / Fluted Profile |
| Serration Type | Concentric grooves, cross-grooves, or radial flutes available |
| Top Diameter Range | 10 mm – 22 mm |
| Height Range | 14 mm – 28 mm |
| Number of Flutes | 2 – 6 grooves (customizable) |
| Flute Depth | 0.5 mm – 2.0 mm |
| Flute Width | 1.0 mm – 3.0 mm |
| Tolerance | ±0.05 mm |
| Hardness (HRA) | 87.0 – 89.0 (grade dependent) |
| Density (g/cm³) | 14.3 – 14.9 (grade dependent) |
| TRS (Transverse Rupture Strength) | 2,500 – 3,200 N/mm² |
| Sintering Technology | HIP (Hot Isostatic Pressing) for optimal densification |
4. Carbide Grade Selection Guide
| Grade | ISO Code | Cobalt Content (%) | Hardness (HRA) | Density (g/cm³) | TRS (N/mm²) | Best Application |
|---|---|---|---|---|---|---|
| YG8 | K20-K30 | 8.0 | 88.5 – 89.0 | 14.7 – 14.9 | ≥ 2,500 | Hard but moderately abrasive formations, balanced wear resistance and toughness |
| YG11C | K30-K40 | 11.0 | 87.5 – 88.0 | 14.3 – 14.5 | ≥ 2,800 | Hard, dense formations with high impact loads, excellent toughness with good wear resistance |
| YG13C | K35-K45 | 13.0 | 87.0 – 87.5 | 14.1 – 14.3 | ≥ 3,000 | Extremely hard and fractured formations, maximum impact resistance with maintainable penetration |
Note: Custom grades with specific cobalt content, grain size, and serration patterns can be developed upon request to suit unique formation types and drilling parameters.
5. Applications
Oil & Gas Drilling: Tricone bits for hard, dense, and low-permeability formations in deep exploration and production wells.
Deep Mining: Production and development drilling in hard rock underground mines for gold, copper, nickel, and PGM (Platinum Group Metals) extraction.
Geothermal Drilling: Penetrating hard and abrasive geothermal formations for energy exploration and extraction.
Hard Rock Quarrying: Dimension stone and aggregate quarrying in granite, quartzite, and other hard rock types.
Tunneling & Civil Construction: Drilling for anchors, probe holes, and foundation work in hard rock terrain.
Water Well Drilling: Deep water wells in hard, dense rock formations requiring maximum penetration rates.
Mineral Exploration: Core drilling and exploration holes for hard rock mineral deposits.
