Product Overview

The Square Holder (Heavy-Duty Winged Block Holder) is a high-performance tooth holder designed for heavy-duty rotary drilling buckets, rock drilling tools, and foundation drilling applications.

Engineered for high-torque drilling environments, the Square Holder provides exceptional stability and durability for drilling teeth under extreme working conditions, including hard rock, gravel, and abrasive geological formations.

Unlike conventional cylindrical holders, the Square Holder features an extended rear wing structure, which significantly increases the contact area and weld length between the holder and the drilling bucket bottom plate. This reinforced design improves load distribution, reduces stress concentration, and minimizes the risk of weld cracking during heavy-duty drilling operations.

Manufactured from premium CrMo alloy steel and precision heat-treated, the Square Holder delivers superior resistance to torsional forces, impact loads, and shear stress, ensuring reliable performance and extended service life in demanding foundation and rock drilling projects.

Key Advantages

1. Reinforced Winged Design for Maximum Welding Strength

The extended rear wing structure provides a larger welding surface compared with standard tooth holders.

Benefits include:

• Increased weld strength between holder and bucket plate
• Improved load transfer under high torque conditions
• Reduced risk of holder loosening or bucket plate deformation
• Enhanced durability during continuous drilling operations

This design makes the Square Holder an ideal choice for heavy-duty rotary drilling buckets exposed to extreme mechanical stress.

2. High-Strength CrMo Alloy Steel Construction

The Square Holder is manufactured using high-grade Chromium Molybdenum (CrMo) alloy steel, offering excellent mechanical properties.

After professional heat treatment, the holder achieves:

• High impact resistance
• Superior wear resistance
• Improved fatigue strength
• Long service life in abrasive drilling environments

It is specially designed for applications where standard holders may experience premature failure.

3. Designed for Hard Rock and High-Torque Drilling

The Square Holder provides reliable performance in challenging geological conditions, including:

• Weathered granite
• Sandstone formations
• Gravel layers
• Mixed soil and rock conditions

Its reinforced structure helps withstand lateral impacts and heavy cutting forces generated during rotary drilling.

Applications

High-Torque Rotary Drilling Buckets

The Square Holder is designed for high-load drilling buckets used in:

• Foundation piling projects
• Bridge construction
• Underground engineering
• Infrastructure development

The extended wing design maximizes welding contact, helping prevent:

• Weld cracking
• Holder breakage
• Bucket bottom plate damage

Medium to Hard Rock Drilling

Suitable for rotary drilling operations involving:

• Rock excavation
• Deep foundation drilling
• Mining-related drilling applications
• Heavy-duty construction projects

The robust structure provides consistent tooth support and improved drilling efficiency.

Retainer Ring Protection System

The Square Holder includes a 6.5mm protective collar design around the retaining ring area.

This feature helps:

• Reduce sand and soil erosion around the retaining system
• Improve retainer ring protection
• Minimize tooth loss during operation
• Increase overall drilling reliability

Product Report – Square Holder Specifications

Why Choose BULLET PEX Square Holder?

BULLET PEX specializes in manufacturing rotary drilling wear parts and foundation drilling tools for global construction and engineering markets.

Our Square Holders are designed to provide:

✓ Heavy-duty performance in extreme drilling conditions
✓ Strong welding stability and reduced maintenance costs
✓ Longer service life compared with standard holders
✓ Reliable support for rotary drilling teeth
✓ OEM customization and worldwide supply capability

For custom sizes, OEM requirements, or bulk orders, please contact BULLET PEX for professional drilling tool solutions.