| Type | D | H | h |
|---|---|---|---|
| SQ0812 | 8.25 | 12.30 | 2.67 |
| SQ1015 | 10.25 | 15.00 | 3.31 |
| SQ1217 | 12.35 | 17.10 | 4.07 |
| SQ1420 | 14.35 | 20.00 | 4.71 |
| SQ1621 | 16.35 | 21.00 | 5.35 |
| SQ1826 | 18.35 | 26.10 | 7.81 |
| SQ1928 | 19.35 | 28.50 | 8.07 |
| SQ2028 | 20.50 | 28.00 | 7.61 |
| SQ2230 | 22.25 | 30.12 | 9.20 |
| SQ2435 | 24.35 | 35.00 | 10.39 |
| SQ2536 | 25.50 | 36.00 | 10.90 |
1. Product Overview
Zhuzhou Jinzhou Carbide provides high-performance tungsten carbide button tips engineered specifically for Down-The-Hole (DTH) rock drilling bits. These cylindrical and hemispherical buttons serve as the primary cutting elements that directly impact and fracture rock formations. Manufactured from premium tungsten carbide powder through advanced HIP (Hot Isostatic Pressing) sintering technology, our button tips deliver exceptional hardness, wear resistance, and impact toughness. They are designed to withstand the severe compressive and impact loads encountered in mining, quarrying, water well drilling, and geotechnical exploration. With precise dimensional control and consistent metallurgical properties, our DTH button tips ensure reliable performance, longer service life, and reduced downtime in the most abrasive drilling environments.
2.Key Features
Superior Impact Toughness: Optimized cobalt content and carbide grain size ensure high resistance to brittle fracture and chipping under repeated high-frequency impacts.
Exceptional Wear Resistance: Ultra-fine grain tungsten carbide structure provides outstanding abrasion resistance, maintaining button profile and cutting efficiency throughout the tool life.
High Compressive Strength: Engineered to withstand extreme point-load pressures, maximizing rock fragmentation with each blow.
Optimized Button Geometry: Precisely manufactured spherical, hemispherical, and ballistic button shapes for maximum energy transfer and penetration rates.
Consistent Quality Assurance: 100% in-house quality control from powder blending to finished product, ensuring uniform hardness, density, and microstructure in every batch.
Customizable Grades: Available in multiple carbide grades to match specific rock types – from soft, non-abrasive formations to extremely hard, highly abrasive strata.
Reliable Supply Chain: Factory-direct production with 7–25 days mass production lead time, ensuring fast delivery without compromising quality.
3. Specifications
| Parameter | Details |
|---|---|
| Material | Tungsten Carbide (WC-Co) |
| Button Shape | Spherical, Hemispherical, Ballistic, Cylindrical, and Wedge types available |
| Diameter Range | 6 mm – 30 mm (custom sizes available upon request) |
| Tolerance | ±0.05 mm (precision ground options available) |
| Hardness (HRA) | 85.0 – 89.5 (depending on grade) |
| Density (g/cm³) | 14.5 – 15.2 (grade dependent) |
| TRS (Transverse Rupture Strength) | 2,200 – 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 |
|---|---|---|---|---|---|---|
| YG6 | K10-K20 | 6.0 | 89.0 – 89.5 | 14.9 – 15.2 | ≥ 2,200 | Soft to medium rock, low impact, high abrasion resistance |
| YG8 | K20-K30 | 8.0 | 88.5 – 89.0 | 14.7 – 14.9 | ≥ 2,500 | Medium hardness rock, balanced wear resistance and toughness |
| YG11C | K30-K40 | 11.0 | 87.5 – 88.0 | 14.3 – 14.5 | ≥ 2,800 | Hard rock, high impact conditions, excellent toughness |
| YG15C | K40-K50 | 15.0 | 86.5 – 87.0 | 13.9 – 14.2 | ≥ 3,200 | Extremely hard and fractured rock, maximum impact resistance |
Note: Custom grades with specific cobalt content and grain size can be developed upon request to suit unique drilling conditions.
5. Applications
Mining & Quarrying: Blast hole drilling in open-pit and underground mines for iron ore, copper, gold, and coal extraction.
Water Well Drilling: Penetrating hard rock formations to reach groundwater reservoirs.
Geothermal Drilling: High-temperature, abrasive rock drilling for geothermal energy projects.
Oil & Gas Exploration: DTH drilling for shallow gas and oil well exploration.
Construction & Civil Engineering: Foundation piling, slope stabilization, and tunnel excavation.
Geotechnical Exploration: Core drilling and site investigation for infrastructure projects.
Dimension Stone Quarrying: Granite and marble quarrying where high penetration rates and surface quality are required.
