Product Overview

The L3050H-19 Extended Hardfaced Rotary Drilling Bullet Tooth is a specialized foundation drilling tooth designed for deep penetration, increased cutting depth, and challenging abrasive geological formations.

Also known as an extended gauge piling tooth, this model features an enlarged cutter head design with an 80mm gauge length (customizable up to 90mm) and an overall length of 140mm (customizable up to 150mm).

Built with a standard Ø30mm shank system, the L3050H-19 combines a high-toughness Ø19mm tungsten carbide insert with circumferential hardfacing wear protection on the cone section.

The extended tooth design provides improved rock clearance, reduced material buildup, faster penetration, and excellent resistance against steel body erosion in abrasive soil, gravel, and hard ground conditions.

Designed for professional contractors worldwide, this extended rotary drilling bullet tooth delivers reliable performance for bridge foundations, diaphragm walls, deep piling, and heavy civil engineering projects.

Technical Specifications

Key Features & Performance Advantages

1. Extended 80mm/90mm Gauge Length Design

The extended cutter head design increases tooth exposure by 10-20mm compared with standard rotary drilling teeth, providing improved cutting clearance and deeper penetration capability.

Benefits include:

• Better rock and soil removal efficiency
• Reduced bucket drag resistance
• Less material clogging in clay and gravel layers
• Improved drilling productivity

This design is especially suitable for deep foundation projects requiring higher excavation efficiency.

2. Circumferential Hardfacing Wear Protection

The L3050H-19 features a reinforced hardfacing wear-resistant layer around the conical head area.

This protective overlay helps prevent:

• Steel body erosion
• Premature tooth wear
• Damage caused by abrasive cuttings
• Reduced drilling performance

The hardfaced surface significantly improves service life in highly abrasive ground conditions.

3. High-Toughness Ø19mm Tungsten Carbide Insert

Equipped with a premium Ø19mm tungsten carbide tip, this rotary drilling bullet tooth provides excellent impact resistance and cutting durability.

The coarse-grain carbide formulation delivers:

• Superior fracture toughness
• Strong impact absorption
• Reduced carbide chipping
• Stable penetration performance

It is suitable for hard soil, gravel, weathered rock, and abrasive formations.

4. Forged 42CrMo Alloy Steel Body

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

The robust steel structure provides:

• High bending resistance
• Excellent shear strength
• Strong fatigue durability
• Reliable performance under high rotary torque

5. 360° Self-Rotating & Self-Sharpening Performance

Designed for standard Ø30mm rotary drilling tooth holders, the L3050H-19 allows smooth 360° rotation during operation.

The self-rotating design ensures:

• Uniform wear distribution
• Continuous self-sharpening effect
• Lower drilling resistance
• Consistent cutting performance

Applications & Compatible Equipment

The L3050H-19 Extended Rotary Drilling Bullet Tooth is designed for advanced foundation construction and heavy-duty drilling applications.

Typical Applications:

• Bridge foundation piling
• Deep foundation engineering
• Subway diaphragm wall construction
• Large-diameter bored piles
• Underground infrastructure projects
• Hard soil and abrasive ground excavation

Compatible Equipment:

Suitable for:

• Rotary drilling rigs
• Drilling buckets
• Core barrels
• Rock augers
• Reamers
• Foundation drilling attachments

Why Choose L3050H-19 Extended Rotary Drilling Bullet Tooth?

✔ Extended gauge length for improved cutting clearance
✔ Hardfacing protection against abrasive wear
✔ High-toughness Ø19mm tungsten carbide insert
✔ Forged 42CrMo alloy steel body
✔ Longer service life in harsh geological conditions
✔ Reduced downtime and replacement frequency
✔ Designed for professional foundation drilling applications