The Key to Efficient Rock Drilling Tools: Material and Design

Table of Contents

A rock drilling tool is a tool for drilling rock, which plays a significant role in rock exploration, mining, tunnel construction, and other fields. The length of its rock drilling life directly affects the efficiency of the project progress, and the key to improving the efficiency of rock drilling tools lies in their material and design.

Selection of materials for rock drilling tools

Drifting and Tunneling Tools

The material of rock drilling tools should be tenacity and wear-resistant, with good rigidity, high fatigue strength, low fatigue notch sensitivity, high ability to clamp alloy sheets, some corrosion resistance, good manufacturing process, and strong hardenability, hardenability and weldability, in line with the national conditions, affordable, and as little as possible, using Ni, Cr.

Rock is a hard material, so rock drilling tools should be strong enough to withstand the impact of a chisel. Common materials include steel, cemented carbide, etc.


Steel is one of the most commonly used materials for rock drilling tools. High-strength steel can withstand high impact and pressure and is suitable for heavy-duty conditions in rock drilling operations. At the same time, steel has good toughness and plasticity and can adapt to complex rock drilling environments. However, due to the poor wear resistance of steel, it is often necessary to take surface coating or other ways to strengthen it.

Cemented carbide

Cemented carbide is a composite material made from a combination of high-hardness materials such as tungsten carbide and metal. Cemented carbide has excellent hardness and wear resistance and can maintain sharpness for a long time during rock drilling. It also resists higher impact loads and has better corrosion resistance. Cemented carbide is generally used in cutting parts of rock drilling tools, such as carbide buttons.

Reasonable Design of Rock Drilling Tools

Open-cutting Drilling Tools

The design of rock drilling tools is not only related to efficiency but also to the safety of operators. The reasonable design of rock drilling tools can be reflected in several aspects.

Reasonable structure

Rock drilling tools should have a reasonable structural design to ensure stability and firmness during rock drilling. It should consider the strength of the material and stress distribution and reduce stress concentration to improve overall durability.

Edge shape

The cutting edge is an essential part of rock drilling tools, and its shape has a direct influence on the effect of rock drilling and operation safety. The shape of the cutting edge should be selected according to the specific rock drilling conditions, and it can be a sharp point, a flat edge, or an edge with a toothed structure. Different edge shapes are suitable for different types of rock.

Interface design

Rock drilling tools usually require connection with drilling rigs or other equipment. The interface design should be reasonable to ensure a stable link and can withstand high-frequency impact and rotational force. At the same time, an interface design that is easy to install and remove can improve operating efficiency.

Environmental requirements

In some particular rock drilling scenarios, rock drilling tools require unique features. For example, special coatings or materials that prevent rust and corrosion can extend the service life of rock drilling tools when working in wet environments. When working in confined spaces, the length and shape of the rock drilling tool should be easy to maneuver without being restrictive. In addition, some rock drilling tools also have an adjustable design, which can change the force and angle of the chisel as needed to meet different rock drilling requirements.

In short, material selection and design principles of rock drilling tools are critical factors in ensuring their high efficiency and durability. Proper material selection can provide sufficient strength and durability to resist impact and deformation. Reasonable design can ensure the transmission of impact force and the optimization of the gouging effect. Therefore, suitable rock drilling tools can improve work efficiency and prolong service life. At the same time, continuous R&D and innovation are also the keys to further extending the service life of rock drilling tools to provide better support for rock drilling work.

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