Tapered Drilling Tools
Top hammer drilling
Starockdrill utilizes premium hexagonal steel GIII material, combined with specialized heat treatment techniques, to extend product lifespan and secure a significant market presence. Typically used for shallow boreholes under 2000mm and deep boreholes exceeding 2000mm, our tapered drilling tools offer hole diameters ranging from 23mm to 45mm.
| Shank | Length (mm) | Taper degree |
Hex 22×108mm | 500-8000 | 7°, 11°, 12° |
Hex 25×108mm | 1500-4000 | 7° |
Hex 32×108mm | 1830-6100 | 7°, 12° |
- Raw materials with high fatigue resistance and toughness ensure reliable product quality.
- High drilling efficiency enables cost-effective operations, reducing overall expenses.
- Comprehensive carburization enhances wear resistance and extends tool life, ensuring reliability and durability.
- Compared to integral drill rods, tapered drill rods offer a longer lifespan, faster drilling speeds, straighter boreholes, and lower cost per meter drilled.
- Tapered Chisel Bits
- Tapered Button Bits
The tapered drill bits are designed to perfectly match our tapered drill rods. Constructed with specialized body materials and utilizing advanced heat treatment carburization techniques, our drill bits excel in wear resistance. The alloy components incorporate top-of-the-line T6 (YK05) alloy, ensuring optimal drilling speed and meterage. Our tapered drill bits are available in chisel, cross, and button designs, tailored to different drilling environments. We use high-quality materials and strictly control heat treatment and carburization processes to meet our customers' diverse needs.
Tapered Chisel Bit | Tapered Cross Bit | Tapered Button Bit | |
| Taper degree | 7° | 7°, 11°, 12° | 7°, 11°, 12° |
| Taper diameter (mm) | 23 | 23 | 22 |
| Bit diameter (mm) | 26-43 | 28-51 | 28-45 |
| Application | Suitable for drilling medium-hard rock and hard rock without fissures, and with rock hardness coefficient below 15 | Suitable for drilling hard rock, extreme hard rock and brock rock layers | Available in hemispherical and semi-ballistic button bits: Suitable for any rock layers except very abrasive ultra-hard rock layers |
- Copper spacer design within the taper ensures smooth operation, preventing bit jamming and enhancing drilling stability.
- Customization options available based on customer requirements, including front holes, side holes, and alloy sizes, to meet the demands of various drilling environments.
