Drill Rod

Drill Rods Specifications

Common Drill Rod Sizes Used in Mining

Why Choose us as your Reliable Drill Rod Factory

Advanced manufacturing technology

Our drill rods adopt a complete set of mature technology such as advanced surface treatment technology, smelting technology, and mechanical processing technology, which greatly reduces the loss of energy in transmission and makes the drilling speed very fast. We have advanced thread manufacturing technology, which can effectively reduce the risk of indentation and fracture at the thread end, making it easier to connect and disassemble drill rods, drill bits and shank adapters, resulting in shorter downtime, straighter drilling holes and higher production efficiency. The escrape groove in the transition area between the thread and the rod body is the weakest area of the drill rod, where the drill rod section is the smallest, not only to bear the high-frequency tensile and compressive normal stress, high torsional stress, but also to withstand the additional bending stress caused by the weight of the drill rod and the rock drilling operations. In drilling practice, Litian continuously optimizes the processing technology of the escrape groove, and has our own unique processing technology, which has minimized the risk of breakage at the escrape groove.

Strict quality control

As a professional drill rod manufacturer, we strictly control all aspects of production to ensure that high-quality drill rods are presented to customers.

What is drill rod used for？

A drill rod is a critical component in drilling systems, used to connect the drilling machine to the drill bit and extend the drilling depth while maintaining control, power transmission, and stability throughout the drilling process.

In practical terms, a drill rod performs several essential functions:

First, it transmits rotational torque and thrust from the drilling machine to the drill bit. As the drilling depth increases, additional drill rods are added to the string, allowing the bit to penetrate deeper into rock, concrete, or other materials without losing power or alignment.

Second, the drill rod maintains hole direction and straightness. High-quality drill rods are manufactured with precise dimensions and strong threaded connections to reduce bending, vibration, and deviation, which is especially important in deep drilling, mining exploration, and construction coring.

Third, drill rods often serve as a conduit for flushing media, such as water, air, or drilling fluid. This flushing removes cuttings from the hole, cools the drill bit, reduces friction, and improves drilling efficiency while preventing tool damage or hole blockage.

In mining and geological drilling, drill rods also play a role in protecting downhole tools by absorbing stress and distributing loads evenly along the drill string. In construction drilling, they help maintain accuracy and stability when drilling through concrete or reinforced materials.

Overall, a drill rod is not just an extension piece—it is a structural and functional component that directly affects drilling performance, hole quality, tool life, and operational safety.

Drill Rod Material Selection and Hardness

Most drill rods are manufactured from high-quality alloy steels, specifically formulated to withstand high torque, impact energy, and cyclic loading. High-strength alloy steels containing elements such as chromium, molybdenum, and nickel are widely used in mining and construction drilling.

Key characteristics:

• High tensile strength

• Good toughness and fatigue resistance

• Suitable for heat treatment

• Balanced wear resistance and ductility
  
  

Alloy steel drill rods are commonly used in:

• Top hammer drilling

• Underground mining

• Surface mining and quarrying

• Construction rock drilling
  
  

Typical Hardness Requirements for Drill Rods

Drill Rods Production Process