| Type | D | H | h |
|---|---|---|---|
| SD0711 | 7.25 | 11.00 | 3.93 |
| SD0913 | 9.25 | 13.00 | 5.00 |
| SD1117 | 11.30 | 17.00 | 6.13 |
| SD1218 | 12.35 | 18.00 | 7.60 |
| SD1422 | 14.35 | 22.00 | 7.40 |
| SD1625 | 16.33 | 24.60 | 9.77 |
| SD1829 | 18.25 | 29.00 | 10.44 |
| SD1930 | 19.22 | 30.00 | 9.95 |
| SD2032 | 20.28 | 32.12 | 12.50 |
| SD2233 | 22.31 | 33.00 | 12.76 |
1. Product Overview
Zhuzhou Jinzhou Carbide offers high-performance tungsten carbide ballistic buttons specifically engineered for rapid penetration rock drilling applications. The ballistic button features a distinct streamlined profile that combines a hemispherical front with a conical rear section, creating an optimal shape for transferring maximum impact energy directly into the rock surface. This unique geometry reduces contact area during initial impact, concentrating force at the center of the button for superior rock fracture initiation, while the tapered body minimizes drag and friction during rotation. Manufactured from premium ultrafine-grain tungsten carbide powder through advanced HIP (Hot Isostatic Pressing) sintering technology, our ballistic buttons deliver exceptional penetration rates, extended service life, and consistent drilling performance in medium to hard rock formations. They are widely used in DTH hammers, rotary blast hole drills, and tunneling equipment for mining, quarrying, and civil construction projects.
2. Key Features
High-Penetration Ballistic Profile: Specialized button shape concentrates impact force at the center, reducing required percussive energy and accelerating fracture propagation for faster drill speeds.
Reduced Friction & Drag: Streamlined design minimizes resistance against the rock surface, allowing higher rotational speeds and lower energy consumption.
Superior Impact Toughness: Engineered with optimized cobalt content and refined carbide grain structure to withstand repeated high-frequency impacts without chipping or fracturing.
Exceptional Wear Resistance: Ultrafine tungsten carbide microstructure ensures outstanding abrasion resistance, maintaining button geometry and sharpness for consistent penetration rates.
Energy Efficiency: Requires less percussive energy per blow compared to spherical or hemispherical buttons, maximizing hammer efficiency and reducing fuel/energy costs.
100% In-House Quality Control: From powder blending through sintering and finishing, every batch undergoes rigorous testing for hardness, density, and dimensional accuracy.
Factory-Direct Availability: Competitive pricing with 7–25 days lead time for mass production, ensuring reliable supply for continuous drilling operations.
3. Specifications
| Parameter | Details |
|---|---|
| Material | Tungsten Carbide (WC-Co) |
| Button Shape | Ballistic / Parabolic profile |
| Diameter Range | 10 mm – 25 mm (custom sizes available upon request) |
| Height Range | 10 mm – 22 mm (proportional to button diameter) |
| 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 – 3,000 N/mm² |
| Sintering Technology | HIP (Hot Isostatic Pressing) for optimal densification and uniform microstructure |
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 penetration speed |
| YG11C | K30-K40 | 11.0 | 87.5 – 88.0 | 14.3 – 14.5 | ≥ 2,800 | Hard rock, high impact conditions, excellent toughness with good penetration |
| 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 rates |
Note: Custom grades with specific cobalt content and grain size can be developed upon request. We also offer surface treatment options for enhanced performance in specific formations.
5. Applications
Mining Industry: Blast hole drilling in open-pit and underground mines for copper, gold, iron ore, and coal extraction where high penetration rates are critical for productivity.
Quarrying: Dimension stone quarrying (granite, marble, limestone) requiring fast, clean holes with minimal damage to surrounding rock.
Water Well Drilling: Penetrating medium-hard to hard rock formations to reach groundwater aquifers efficiently.
Tunneling & Civil Construction: Drilling for foundation anchors, slope stabilization, and tunnel face drilling where rapid progress is essential.
Geothermal Exploration: High-speed drilling through varied rock formations for geothermal energy projects.
Oil & Gas Shallow Drilling: DTH drilling for shallow gas and oil exploration wells.
Infrastructure Projects: Site investigation, geological exploration, and core drilling for highways, dams, and large-scale construction.
