Product Overview

The 3055N8-22 Wear-Resistant Reinforced Rotary Drilling Bullet Tooth is a premium heavy-duty drilling wear part engineered for extreme rock breaking, highly abrasive formations, quartzite, granite, basalt, and coarse cobble conditions.

Also known as an Ø55mm heavy-body N8 hardfaced piling tooth, the 3055N8-22 is designed for demanding foundation drilling applications where maximum impact resistance, structural strength, and long service life are required.

Built with a standard Ø30mm shank system and Ø38mm step collar, this reinforced rotary drilling tooth features an enlarged Ø55mm head diameter, 70mm gauge length, and 130mm overall length.

The combination of a heavy-duty Ø22mm oversized tungsten carbide insert, reinforced head geometry, and 8 longitudinal hardfacing wear-resistant stripes provides exceptional protection against steel body wash, carbide damage, and structural failure under ultra-high torque drilling conditions.

Designed for professional foundation drilling contractors, the 3055N8-22 delivers reliable cutting performance for large-diameter piling, offshore wind foundations, deep rock excavation, and major infrastructure projects.

Technical Specifications

Key Features & Performance Advantages

1. Reinforced Ø55mm Heavy-Duty Head Design

The enlarged Ø55mm head diameter provides additional steel support around the carbide insert, improving structural protection under extreme drilling loads.

The reinforced head design helps:

• Absorb heavy impact forces
• Improve lateral load resistance
• Reduce carbide breakage risk
• Increase overall tooth durability

This makes the 3055N8-22 especially suitable for severe rock drilling environments.

2. Oversized Ø22mm Tungsten Carbide Cutting Tip

The premium Ø22mm tungsten carbide insert delivers powerful rock-crushing performance and excellent wear resistance.

The coarse-grain carbide formulation provides:

• High impact toughness
• Superior fracture resistance
• Stable cutting performance
• Longer operating life

It is ideal for:

• Granite
• Basalt
• Quartzite
• Hard sandstone
• Large cobble formations

3. 8-Stripe Hardfacing Armour Protection

The 3055N8-22 features eight longitudinal hardfacing wear-resistant stripes around the conical head.

This reinforced wear protection creates a durable barrier against:

• Abrasive slurry erosion
• Steel body wash
• Excessive surface wear
• Premature tooth failure

The hardfacing armour significantly extends service intervals in highly abrasive ground conditions.

4. Optimized 70mm Gauge Length Design

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

Benefits include:

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

5. Forged 42CrMo Steel Body with 360° Rotation

Manufactured from drop-forged 42CrMo alloy steel and precision heat-treated to HRC 48-52, the tooth body provides exceptional mechanical strength.

Combined with standard Ø30mm retainers, the self-rotating design enables:

• Smooth 360° rotation
• Uniform wear distribution
• Continuous self-sharpening action
• Maximum service life

Applications & Compatible Equipment

The 3055N8-22 Reinforced Rotary Drilling Bullet Tooth is designed for professional heavy-duty foundation drilling and rock excavation applications.

Typical Applications:

• Large-diameter bridge foundation piling
• Offshore wind turbine foundations
• High-speed railway infrastructure
• Deep bedrock engineering
• Underground construction
• Hard rock excavation projects

Compatible Equipment:

Suitable for:

• Rotary drilling rigs
• Heavy-duty rock buckets
• Core barrels
• Reaming tools
• Foundation drilling attachments

Why Choose 3055N8-22 Rotary Drilling Bullet Tooth?

✔ Reinforced Ø55mm head design for extreme impact conditions
✔ Oversized Ø22mm tungsten carbide tip for higher crushing force
✔ 8-stripe hardfacing protection against severe abrasion
✔ Forged 42CrMo steel body for maximum durability
✔ Designed for granite, basalt, quartzite, and hard rock formations
✔ Reduced downtime and longer replacement intervals
✔ Compatible with standard Ø30mm rotary drilling holders