| Type | D | H | h |
|---|---|---|---|
| SB1215A‑E15 | 12.35 | 15.00 | 6.00 |
| SB1418‑E18 | 14.37 | 18.00 | 5.50 |
| SB1419‑E14Q | 14.30 | 19.60 | 8.40 |
| SB1620‑E19 | 16.37 | 20.60 | 7.20 |
| SB1825‑E20Q | 18.25 | 25.20 | 10.80 |
| SB1924‑E21 | 19.375 | 24.05 | 9.05 |
| SB2333B‑E22 | 23.37 | 33.50 | 15.00 |
| Sb2941 | 28.90 | 42.00 | 20.91 |
1. Product Overview
Zhuzhou Jinzhou Carbide provides high-performance wedge-shaped tungsten carbide inserts, commonly known as “axe teeth,” designed specifically for tricone (three-cone) drill bits operating in the most challenging rock drilling environments. The wedge or axe profile features a sharp, elongated crest that delivers an intense, focused point-load impact against the rock surface, initiating rapid fracture propagation with minimal energy loss. This aggressive cutting geometry makes wedge inserts particularly effective in hard, brittle, and fractured rock formations where spherical or ballistic buttons may struggle to maintain penetration rates. The sturdy base and reinforced cross-section ensure excellent resistance to breakage and chipping, while the ultra-hard tungsten carbide material provides outstanding abrasion resistance. Manufactured through advanced powder metallurgy and HIP sintering technology, our wedge inserts deliver consistent performance, extended service life, and reliable operation in oil and gas drilling, deep mining, and geothermal exploration.
2. Key Features
Aggressive Wedge Geometry: Sharp, elongated crest concentrates impact force into a focused line of contact for maximum rock fracture initiation and rapid penetration.
Superior Point-Load Impact: Wedge profile delivers higher point-load intensity compared to spherical or ballistic buttons, effectively breaking hard and brittle rock formations.
Exceptional Breakage Resistance: Reinforced cross-section design prevents insert failure under high shock loads and severe drilling conditions.
Outstanding Abrasion Resistance: Premium ultrafine-grain tungsten carbide composition ensures long wear life even in highly abrasive rock strata.
Optimized for Fractured Formations: Wedge shape excels at bridging and breaking fractured or jointed rock where other profiles tend to stall or skid.
Versatile Grade Selection: Available in multiple carbide grades to balance wear resistance and impact toughness based on specific rock types.
100% In-House Quality Control: Rigorous inspection of hardness, density, and dimensional accuracy from powder to finished insert.
Custom Manufacturing: Wedge dimensions, crest radius, and grade can be customized to match specific bit designs and drilling parameters.
3. Specifications
| Parameter | Details |
|---|---|
| Material | Tungsten Carbide (WC-Co) |
| Insert Shape | Wedge / Axe Profile |
| Crest Type | Sharp wedge, Rounded wedge, or Blunt wedge available |
| Width Range | 8 mm – 20 mm |
| Height Range | 14 mm – 30 mm |
| Length Range | 16 mm – 35 mm |
| Crest Radius | R0.5 mm – R3.0 mm (customizable) |
| Tolerance | ±0.05 mm |
| Hardness (HRA) | 86.5 – 89.0 (grade dependent) |
| Density (g/cm³) | 14.0 – 14.9 (grade dependent) |
| TRS (Transverse Rupture Strength) | 2,200 – 3,200 N/mm² |
| Sintering Technology | Vacuum Sintering + HIP (Hot Isostatic Pressing) for optimum density |
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 | Medium-hard rock, balanced wear resistance and toughness, suitable for moderate drilling conditions |
| YG11C | K30-K40 | 11.0 | 87.5 – 88.0 | 14.3 – 14.5 | ≥ 2,800 | Hard rock, high-impact conditions, 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 rock, maximum impact resistance with maintainable penetration |
| YG15C | K40-K50 | 15.0 | 86.5 – 87.0 | 13.9 – 14.2 | ≥ 3,200 | Severe impact, deep hard rock drilling with high shock loads, maximum toughness |
Note: Custom grades with specific cobalt content, grain size, and wedge geometry can be developed upon request. We also offer surface finishing options for improved press-fit retention.
5. Applications
Oil & Gas Drilling: Tricone bits for exploration and production wells in hard rock formations, including deep drilling through granite, quartzite, and dolomite.
Mining & Blast Hole Drilling: Open-pit and underground mining operations where hard, abrasive rock formations require aggressive cutting action.
Geothermal Drilling: Penetrating hard and fractured geothermal formations for energy exploration and extraction.
Water Well Drilling: Deep water wells in hard rock aquifers requiring maximum penetration rates.
Geotechnical & Foundation Drilling: Site investigation and foundation holes in dense rock formations.
Seismic Exploration: Shallow and deep drilling for seismic survey holes in hard rock terrain.
Mineral Exploration: Core drilling and exploration holes for hard rock mineral deposits.
