Tapered Drilling Tools

Available Bit Types: Tapered Button, Chisel, and Cross Bits
Diameter Range: 26mm to 60mm
Taper Degrees: 4°46', 7°, 11°, 12°
Compatible Shank Sizes: Hex. 19mm, Hex. 22mm, Hex. 25mm
Core Material: Premium Tungsten Carbide Inserts & High-Strength Alloy Steel Body
Applications: Granite, Basalt, Limestone quarrying, tunneling, and mining operations

High-Performance Tapered Drilling Tools for Efficient Rock Excavation

Tapered button bits stand out as the most widely utilized and popular drilling tools in the global mining and quarrying industry. Featuring premium tungsten carbide buttons hot-pressed onto high-strength steel skirts, our tapered bits deliver exceptional drilling performance, fast penetration rates, and outstanding longevity. Bloom Machinery manufactures a comprehensive range of heavy-duty tapered drill bits—including button, chisel, and cross designs—perfectly compatible with standard Hex 19mm, 22mm, and 25mm drill rods for pneumatic handheld and air-leg rock drills.

Bit Type & Core Models	Available Taper	Diameter	Ideal Rock / Scenarios	Key Selling Point / Note
Tapered Button Bits	—	—	Medium to Hard Rock (Granite, Basalt)	Most popular choice for longest service life.
↳ Q7-32-1122-50	7°	32mm	Standard Granite Drilling	Global Best-Seller: Fits YT27/YT28 pneumatic drills perfectly.
↳ Q7-36-1122-50	7°	36mm	Mid-hole Quarrying	Optimized flushing holes for faster penetration.
↳ Q8-38-1122-50	7°	38mm	Hard & Highly Abrasive Rock	8-Button design, maximum carbide protection.
↳ Q8-34-722-80	7°	34mm	Deep Hole Alignment	Extended skirt (80mm) to prevent hole deviation.
↳ Q7-32-722-65	7°	32mm	High-Speed Drifting	Short-skirt configuration for rapid rock breaking.
↳ Q8-48-1222-65	12°	48mm	Heavy-duty Mining	Large 12° taper, built for heavy pneumatic rigs.
Tapered Chisel Bits	—	—	Soft to Medium Rock (Limestone, Marble)	Cost-effective & very easy for regrinding.
↳ Standard Tapered Chisel Bit	7°	20-42mm	Dimensional Stone Cutting	Traditional high-tonnage economical solution.
↳ TC15 - 20 Chisel Bit	7°	20-42mm	Medium Rock Quarrying	Featured with premium TC15 grade tungsten carbide.
Tapered Cross Bits	—	—	Fractured & Jointed Rock (Fissured)	Anti-jamming design for complex geologies.
↳ Standard Taper Cross Bit	7°	30-45mm	Cracked Rock Formations	4-carbide cross layout to prevent bit jamming.
↳ Cross Bits (Spec Extension)	7°	30-45mm	Complex Broken Strata	Enhanced structural steel body against high impact.