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High-efficiency 26-41mm Diameter Taper Drill Bit for Small Hole Drilling in Mining Applications

Categories Rock Drilling Tools
Brand Name: MIROC
Model Number: 4°, 6°, 7°, 11°, 12°
Certification: ISO
MOQ: 1
Price: 8.5
Supply Ability: 3000
Delivery Time: 20-30
Series: Taper Button Bit
Advantage: High-efficiency
Quality: High-Quality
Color: Customer's Requirement
Application: Coal Drilling
Usage: Small Hole Drilling
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High-efficiency 26-41mm Diameter Taper Drill Bit for Small Hole Drilling in Mining Applications

Product Name: Taper Drill Bit

Key Features

  • Tapered design allows bit change without changing the drill rod

  • Cross-type taper bit is preferred for minimizing hole deviation in small-hole drilling

  • Smaller taper angle prevents bit spinning (affects "knock-off" index)

  • Suitable for drifting and tunneling

Technical Specifications



ParameterDetails
Taper Degree4°, 6°, 7°, 11°, 12°
Diameter26mm – 41mm (1" – 1 3/5")
Drill Bit TypeChisel bit, Button bit, Cross bit
Carbide Insert ShapeSpherical, Ballistic
Button Bit Skirt DesignShort skirt, Long skirt
Chisel Bit SubtypesStandard chisel, Oblique chipways, Flat chipways, Oblique flat chipways
MaterialHigh-strength alloy steel bar + Tungsten carbide
ColorGreen, Blue, Gold, Black (or customized)

Applications

  • Small-hole rock drilling

  • Custom designs available for specific applications

Small HoleDrilling ToolsTaper DegreeThe NumberOf ButtonBit Dia.(mm)SkirtWeight(kg)
Tapered
432-42Short Skirt0.24-0.43

634Short Skirt0.29
732-42Short Skirt0.26-0.43

732-41Long Skirt0.30-0.42

432-40Short Skirt0.24-0.40
11°538-40Short Skirt0.39-0.40

633-36Short Skirt0.25-0.36

732-41Short Skirt0.24-0.41

732-41Long Skirt0.30-0.42

833-35Long Skirt0.31-0.35
12°428-30Short Skirt0.20-0.22
528-30Short Skirt0.20-0.22
630-38Short Skirt0.22-0.40
732-38Short Skirt0.24-0.40
732-41Long Skirt0.30-0.42
833-35Long Skirt0.31-0.35


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