Product Overview

The 3050N8-22 Wear-Resistant Hardfaced Rotary Drilling Bullet Tooth is a high-performance foundation drilling wear part engineered for extreme rock breaking, hard formations, abrasive sandstone, granite, basalt, and large gravel conditions.

Also known as an N8 hardfaced piling tooth or reinforced rotary drilling tooth, the 3050N8-22 is designed for demanding drilling environments where maximum impact resistance and long service life are required.

Featuring an upgraded Ø22mm oversized tungsten carbide insert, this rotary drilling tooth provides a larger cutting contact area and improved crushing force compared with standard Ø19mm models.

The tooth is manufactured with a standard Ø30mm shank system and Ø38mm step collar, combined with 8 longitudinal hardfacing wear-resistant stripes around the conical head. This reinforced design effectively reduces steel body erosion, abrasive wear, and premature tooth failure.

With a forged 42CrMo alloy steel body, advanced brazing technology, and self-rotating design, the 3050N8-22 delivers stable penetration performance and extended operating life in the most challenging geological conditions.

Technical Specifications

Key Features & Performance Advantages

1. Oversized Ø22mm Tungsten Carbide Insert

The 3050N8-22 features a larger Ø22mm tungsten carbide tip designed for high-impact rock breaking applications.

Compared with standard carbide teeth, the enlarged insert provides:

• Greater cutting contact area
• Higher impact resistance
• Improved crushing capability
• Longer wear life

The premium carbide grade maintains excellent performance in:

• Granite
• Basalt
• Hard sandstone
• Weathered rock
• Large gravel formations

2. 8-Stripe Hardfacing Armour Protection

The unique 8-stripe hardfacing design provides a powerful wear-resistant barrier around the conical tooth body.

The reinforced hardfacing layer helps prevent:

• Steel body wash
• Abrasive slurry erosion
• Premature body wear
• Loss of structural strength

This protection significantly improves service life in highly abrasive geological conditions.

3. Optimized 70mm Gauge Length Design

The 70mm gauge length with 130mm total length provides an excellent balance between cutting efficiency and structural durability.

Benefits include:

• Improved drilling stability
• Higher bending resistance
• Better impact absorption
• Reliable performance under high torque loads

4. Drop-Forged 42CrMo Alloy Steel Body

The tooth body is manufactured from high-strength 42CrMo alloy steel and precision heat-treated to HRC 48-52.

The forged structure provides:

• Excellent tensile strength
• Superior shear resistance
• High fatigue durability
• Reduced risk of bending or breakage

This ensures reliable performance during heavy-duty rotary drilling operations.

5. Advanced Carbide Brazing Technology

High-frequency induction brazing creates a strong bond between the tungsten carbide insert and steel body.

This manufacturing process ensures:

• High shear strength
• Secure carbide retention
• Improved impact reliability
• Reduced carbide tip failure

6. 360° Self-Rotating & Self-Sharpening Performance

Designed for standard Ø30mm rotary drilling tooth holders, the 3050N8-22 allows smooth 360° rotation during drilling.

The self-rotating system provides:

• Uniform wear distribution
• Continuous self-sharpening effect
• Stable penetration speed
• Maximum service life

Applications & Compatible Equipment

The 3050N8-22 Hardfaced Rotary Drilling Bullet Tooth is designed for professional foundation drilling and heavy construction applications.

Typical Applications:

• Bridge foundation piling
• Offshore wind turbine foundations
• High-speed railway pier construction
• Deep rock engineering
• Large-scale infrastructure projects
• Hard rock excavation

Compatible Equipment:

Suitable for:

• Rotary drilling rigs
• Core barrels
• Rock drilling buckets
• Reaming tools
• Foundation drilling attachments

Why Choose 3050N8-22 Rotary Drilling Bullet Tooth?

✔ Oversized Ø22mm tungsten carbide tip for superior rock penetration
✔ 8-stripe hardfacing protection for extreme wear resistance
✔ Designed for granite, basalt, sandstone, and hard rock formations
✔ Forged 42CrMo steel body for maximum durability
✔ Reduced downtime and replacement frequency
✔ Stable performance under high torque drilling conditions
✔ Compatible with standard Ø30mm drilling holders