48mm Tapered Button Bits Carbide Rock Drill Bit Percussive Drilling Tool for Handheld Mining Tunneling Anchor Bolting

Product Introduction

The 48mm Tapered Button Bit is a percussive rock drilling tool specifically engineered for handheld pneumatic or light hydraulic rock drilling equipment. Its tapered shank design utilizes a conical self-locking connection — commonly available in 6°,7°, 11°, and 12° standard taper angles — that eliminates the need for external clamping chucks while delivering reliable torque transmission under high-frequency impact loads. The 48mm diameter body, combined with premium tungsten carbide inserts (available in button, cross, or chisel configurations), is optimized for medium-hard to hard rock formations where efficient blast hole and anchor bolt hole drilling is required.

Applications

• Coal Mine Anchor Support: Drilling anchor bolt holes for mesh-reinforced roof and rib support systems in underground coal mining operations
• Traffic Tunnel Excavation: Primary support drilling and blast hole preparation during tunnel construction across highway and railway projects
• Rock Blasting Engineering: Short-hole blast drilling for quarry bench blasting, trench excavation, and secondary rock breaking
• Foundation and Slope Works: Rock anchor drilling for slope stabilization, retaining wall anchoring, and foundation reinforcement
• General Underground Construction: Utility tunnel drilling, shaft sinking, and other infrastructure projects requiring handheld percussive drilling

Features and Advantages

• Anti-Slip Self-Locking Connection: The tapered shank generates friction-driven axial self-locking under impact — far exceeding straight-shank torque capacity — completely eliminating relative rotation wear and bit detachment
• High Impact Durability: 48mm body paired with hot-pressed brazed tungsten carbide inserts delivers exceptional wear resistance and impact fracture toughness in medium-hard to hard rock
• Rapid Tool-Free Bit Changes: No complex clamping mechanisms required — simple knock-on installation and knock-off removal dramatically reduce downtime in frequent-change underground operations
• Straight-Hole Guidance: Optimized body geometry with flute channels assists rock debris evacuation while maintaining borehole straightness and minimizing deviation during extended drilling runs
• Multiple Insert Configurations: Available with button, cross, or chisel carbide tip profiles to match specific rock hardness and fracturing characteristics for maximum penetration efficiency
• Cost-Effective Operation: Compared to threaded drill systems, the taper connection offers simpler construction, lower failure rates, and reduced cost-per-meter in handheld drilling applications
• Broad Equipment Compatibility: Designed to work with standard tapered drill rods and compatible with major handheld pneumatic and hydraulic rock drill models used globally

Technical Specifications