Product Overview

The 78×95 Large Round Holder (Rotary Drilling Pick Holder) is a heavy-duty mounting component designed for rotary drilling buckets, rock core barrels, foundation drilling tools, and piling equipment.

Manufactured from high-strength forged alloy steel such as 42CrMo, this drilling tooth holder is engineered to withstand high torque, impact loads, and severe wear conditions commonly found in foundation construction and rock excavation operations.

The smooth round outer profile reduces cutting resistance and improves material flow around the drilling tool, helping maintain stable drilling performance in soil, gravel, and rock formations.

Through advanced heat treatment and precision CNC machining, the 78×95 Large Round Holder provides excellent mechanical strength, accurate tooth positioning, and reliable locking performance for 30mm and 38mm shank rotary drilling picks, including C31HD and B47K series cutter bits.

This robust pick holder design effectively reduces premature wear, prevents tooth loosening, and extends the service life of rotary drilling equipment.

Key Features and Performance Advantages

1. High-Strength Forged 42CrMo Steel Construction

The 78×95 Large Round Holder is manufactured from premium forged alloy steel to achieve superior durability under demanding drilling conditions.

The forged structure provides:

High tensile strength
Excellent impact resistance
Superior fatigue performance
Strong deformation resistance
Extended operational lifespan

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

2. Precision Machined Tooth Mounting System

The holder is manufactured using high-precision CNC machining to ensure accurate dimensions and consistent fitting performance.

Advantages include:

Secure cutter bit installation
Reduced tooth movement
Improved drilling stability
Lower risk of tooth loss
Faster replacement and maintenance

The optimized holder design provides reliable support for round shank rotary drilling picks.

3. Optimized Round Profile for Efficient Drilling

The smooth large round holder profile minimizes resistance during cutting operations and improves material discharge around the drilling tool.

Benefits include:

Reduced soil and rock friction
Improved cutting efficiency
Better debris flow
Reduced energy consumption
More stable drilling performance

The round structure is particularly suitable for rotary drilling applications where continuous rotation and smooth material removal are required.

4. Reliable Locking Performance for Round Shank Picks

The 78×95 holder is designed for professional rotary drilling picks with 30mm and 38mm shank systems.

Compatible cutting tools include:

C31HD rotary drilling picks
B47K series cutter bits
Other compatible round shank drilling teeth

The precision locking system helps:

Prevent cutter bit loosening
Maintain consistent cutting angles
Reduce unexpected downtime
Improve jobsite safety

Applications

The 78×95 Large Round Holder is widely used in heavy-duty foundation and excavation projects.

Typical Applications:

Foundation Piling and Deep Excavation

Suitable for:

Urban construction projects
Bridge foundation drilling
High-rise building foundations
Diaphragm wall construction
Infrastructure development

Rotary Drilling Equipment

Compatible with:

Rotary drilling buckets
Rock drilling buckets
Core barrels
Foundation drilling attachments
Heavy-duty drilling systems

Welding and Installation Advantages

Optimized Welding Design

The holder features a standardized welding bevel geometry to ensure strong attachment to drilling buckets and drilling tools.

Benefits include:

Deep weld penetration
High shear strength
Improved structural reliability
Reduced risk of welding failure

The optimized welding design helps maintain long-term performance under vibration, impact, and high-torque drilling conditions.

Why Choose 78×95 Large Round Holder?

The 78×95 Large Round Holder Rotary Drilling Pick Seat provides a durable and reliable solution for contractors requiring high-performance drilling tool components.

Key advantages: