| Type | D | H |
|---|---|---|
| SP0807-E15 | 8.25 | 6.90 |
| SP1010-E20 | 10.35 | 10.00 |
| SP1212-E18 | 12.37 | 12.00 |
| SP1515-G15 | 15.00 | 15.00 |
1. Product Overview
Zhuzhou Jinzhou Carbide manufactures high-quality flat-top tungsten carbide buttons and inserts engineered specifically for DTH (Down-The-Hole) drill bits and rotary percussive drilling equipment used in mining and quarrying operations. The flat-top design features a flattened, wear-resistant crest that provides excellent durability while maintaining effective rock fracture capability. Unlike round-top or ballistic buttons that rely primarily on point-load impact, flat-top buttons offer a larger, stable contact surface that distributes wear evenly and retains the button’s gage diameter longer — critical for maintaining hole straightness and consistent penetration rates. Manufactured from premium ultrafine-grain tungsten carbide through advanced HIP (Hot Isostatic Pressing) sintering technology, our flat-top inserts deliver superior wear resistance, reliable impact toughness, and outstanding performance in medium to hard rock formations. They are widely used in surface mining, underground development, water well drilling, and construction projects.
2. Key Features
Flat-Top Wear Surface: Flattened crest design provides a durable, wear-resistant contact face that maintains button shape and gage diameter throughout the drilling cycle.
Extended Gage Retention: The flat profile ensures consistent hole diameter and straightness, reducing the need for bit changes and reaming.
Excellent Impact Toughness: Optimized cobalt content and carbide grain structure withstand high-frequency percussive impacts without chipping or spalling.
Superior Abrasion Resistance: Premium tungsten carbide composition ensures long service life in moderately abrasive rock formations.
Balanced Cutting Action: The flat top delivers effective rock fracture while providing greater surface area for wear distribution, extending insert life.
Versatile Application Range: Suitable for a wide variety of rock types and drilling conditions, making it a preferred choice for general-purpose DTH bits.
100% In-House Quality Control: From powder blending to final inspection, every batch meets strict standards for hardness, density, and dimensional accuracy.
Customizable Options: Available in multiple diameters, heights, and carbide grades to match specific bit designs and drilling requirements.
3. Specifications
| Parameter | Details |
|---|---|
| Material | Tungsten Carbide (WC-Co) |
| Button Shape | Flat Top / Flat Crest |
| Top Shape | Flat, slightly domed flat, or chamfered flat available |
| Diameter Range | 6 mm – 22 mm |
| Height Range | 8 mm – 20 mm (proportional to diameter) |
| Flat Diameter | 1.0 mm – 4.0 mm (customizable) |
| Tolerance | ±0.05 mm |
| Hardness (HRA) | 87.0 – 89.5 (grade dependent) |
| Density (g/cm³) | 14.3 – 15.2 (grade dependent) |
| TRS (Transverse Rupture Strength) | 2,200 – 2,800 N/mm² |
| Sintering Technology | Vacuum Sintering + HIP (Hot Isostatic Pressing) |
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-hard rock, low impact, maximum wear resistance |
| YG8 | K20-K30 | 8.0 | 88.5 – 89.0 | 14.7 – 14.9 | ≥ 2,500 | Medium-hard rock, balanced wear resistance and toughness (general purpose) |
| YG10C | K25-K35 | 10.0 | 88.0 – 88.5 | 14.5 – 14.7 | ≥ 2,700 | Hard rock with moderate impact, excellent balance of wear and toughness |
| YG11C | K30-K40 | 11.0 | 87.5 – 88.0 | 14.3 – 14.5 | ≥ 2,800 | Hard rock, high impact conditions, maximum toughness with good wear resistance |
Note: Custom grades with specific cobalt content, grain size, and flat-top geometry can be developed upon request to suit unique drilling conditions.
5. Applications
Surface Mining: Blast hole drilling in open-pit mines for iron ore, copper, gold, and coal extraction.
Underground Mining: Production drilling and development headings in underground hard rock mines.
Quarrying: DTH drilling for dimension stone, aggregate, and crushed stone production.
Water Well Drilling: Penetrating medium-hard rock formations for groundwater exploration and supply.
Construction & Civil Engineering: Foundation drilling, slope stabilization, and geotechnical investigation.
Geothermal & Exploration Drilling: Shallow to medium-depth exploration holes in varied rock formations.
Seismic Blast Hole Drilling: Drilling holes for seismic exploration and vibration monitoring.
