Official Export Subsidiary of Kaishan Group (Est. 1956) | Quzhou Manufacturing Base
Our Quzhou engineering desk calculates the exact borehole diameter, rock hardness, and necessary CFM/Bar ratio for your project.
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Kaishan DTH Drilling Rigs
Heavy-duty surface crawlers and integrated rigs for open-pit mining, quarry blasting, and slope stabilization. High penetration rate and anti-jamming hydraulic system.
EQUIPMENT CATEGORIES
Direct Overview: Tapered Button Bits are premium percussive rock drilling tools widely used in granite/marble quarrying, underground mining, tunneling, and bench excavation. Manufactured from high-grade 45CrNiMoV alloy steel and embedded with virgin Tungsten Carbide tips (YK05 / T6), they feature standard taper connections of 7°, 11°, and 12° (also 6°) to fit H19, H22, and H25 hexagonal tapered drill rods. Available in diameters from 30 mm to 42 mm with 4, 5, 6, 7, or 8 button configurations, they deliver high penetration rates, long service life, and exceptional resistance to abrasive wear.
In dimensional stone quarrying (granite, marble, limestone, sandstone) and underground drift mining, operators demand rock drill bits that offer fast penetration rates, clean flushing, and minimal button premature breakage. Compared to traditional cross or chisel bits, tapered button bits provide superior rock fracturing efficiency, longer drilling life between regrindings, and lower energy consumption.
Our tapered button bits are precision-machined on multi-axis CNC centers and subjected to rigorous vacuum heat treatment. Paired with hand-held jackhammers (such as YT24, YT28, Y19, Y26) or air-leg rock drills, the high-precision tapered female socket ensures a slip-free friction-locked fit with hexagonal drill steels (H22/H25), ensuring maximum kinetic energy transmission directly into rock faces.
Forged from premium structural alloy steel with optimized grain structure. Advanced vacuum carburization and induction hardening provide exceptional fatigue strength and eliminate bit body fracture under high impact.
Equipped with premium micro-grain tungsten carbide buttons offering superior toughness and hardness. Semi-ballistic and spherical/conical profiles resist abrasive wear in hard rock up to f=18.
Buttons are pressed into CNC-reamed holes via precision hot-fitting and cold-press expansion techniques. Uniform interference fit prevents button drop-out, loosening, or shear failure during percussive drilling.
Precision-ground internal taper angles (6°, 7°, 11°, 12°) match global rod standards for H19, H22, and H25 drill steels. Ensures rigid torque transmission and effortless manual bit knock-off/removal.
Engineered with 1 center front flushing port and 1 side flushing port for high-velocity compressed air or pressurized water flow, ensuring rapid cuttings evacuation and preventing secondary bit regrinding.
Supplied in 4, 5, 6, 7, and 8 button configurations tailored to specific rock hardness. Finished in corrosion-resistant powder coatings (golden, yellow, red, black, or blue) as required.
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Product Summary: Tapered Button Bits are premium rock drilling consumables engineered for granite/marble quarrying, tunneling, and underground mining. Forged from high-grade 45CrNiMoV alloy steel and embedded with virgin Tungsten Carbide tips (YK05/T6), they feature standard taper connections of 7°, 11°, and 12° (also 6°) to fit H19, H22, and H25 hexagonal drill rods. Available in diameters from 30 mm to 42 mm with 4 to 8 button designs, they offer high penetration rates, long service life, and superior wear resistance across hard rock formations. Heavy-Duty Tapered Rock Drill Bits for Quarrying & MiningIn dimensional stone cutting, bench blasting, and drifting operations, drilling efficiency depends heavily on bit durability and energy transfer. Compared to traditional chisel or cross bits, tapered button bits deliver higher rock-fracturing velocity, extended drilling meterage between regrindings, and lower operational costs. Compatible with popular pneumatic and hydraulic hand-held rock drills (such as YT24, YT28, Y19, and Y26), these bits lock securely onto hexagonal tapered drill rods via precision friction tapers. Dual flushing ports (one center, one side) ensure rapid cuttings evacuation via high-pressure air or water. Key Engineering Advantages & Metallurgy45CrNiMoV Alloy Steel BodyPrecision-machined via CNC centers and vacuum carburized to provide extreme structural strength and resist body breakage under high percussive impact. Virgin Tungsten Carbide TipsEquipped with premium YK05 / T6 carbide inserts in semi-ballistic or conical profiles, delivering aggressive rock penetration in abrasive formations up to f=18. Secure Interference FitButtons are pressed into reamed sockets using specialized hot-press and cold-expansion technology, eliminating button loss during deep hole drilling. Dual Flushing Hole DesignConfigured with 1 front center hole and 1 side flushing port for air or water, quickly clearing rock debris and preventing bit regrinding wear. Tapered Button Bits Specifications Matrix
Primary Industrial Applications
Frequently Asked Questions (FAQ)Q: How do I choose between 7°, 11°, and 12° taper angles?A: 7° taper bits are primarily used with lighter rock drills and H19/H22 rods for shallow drilling; 11° and 12° tapers provide stronger clamping torque and are recommended for heavy-duty pneumatic rock drills (e.g., YT28) and H25 rods in hard abrasive ground. Q: What button shape is recommended for hard abrasive rock?A: Semi-ballistic buttons offer the best combination of fast penetration and high impact toughness in medium-hard to hard formations, while spherical (dome) buttons are ideal for extremely hard and abrasive granites to minimize tip wear. Tapered Drill Bit
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Founded in 2022 in Quzhou City, Zhejiang Province. Operating as the global integrated export arm of Kaishan Group, delivering heavy-duty DTH drill rigs, water well exploration machinery, and screw air compressors worldwide.
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