Brighttop Drill Rod Selection Guide Helps Quarry Operators Improve Drilling Efficiency and Rod Lifespan

Case Overview

A quarry operator running multiple rock drilling machines experienced frequent drill rod failures, inconsistent penetration and shortened rod service life. The root cause was unclear: different drilling machines required different shank rod designs, and the operator had been using a single rod type across all equipment. Brighttop Global Co., Ltd helped the customer identify the correct drill rod classification for each machine, select the right material, and apply proper design and quality checks to improve drilling efficiency and rod lifespan.

Customer Background

The operator manages a quarry site with a mix of lightweight, medium-sized and heavy-duty rail-guided rock drilling machines. Each machine type has different connection requirements and torque demands. The previous supplier provided drill rods without considering machine compatibility, which led to poor energy transfer, loose connections and accelerated wear.

The Challenge

• Frequent drill rod breakage and short service life
• Mixed machine fleet requiring different rod types and connections
• Unclear material selection affecting durability
• Loose rod-to-machine connections reducing drilling efficiency

The Solution

Brighttop Global Co., Ltd analyzed the customer's equipment fleet and drilling conditions, then provided a practical rod selection and application guide.

• Shoulder Type Drill Rods recommended for lightweight rock drilling machines, with hexagonal cross-section, 22mm and 25mm inner diameters, and 108mm and 159mm lengths, produced by forging for effective impact energy transmission.
• Eared Type Drill Rods recommended for medium-sized rail-guided machines with internal rotation, available in 25mm and 32mm diameters for a sturdy machine connection.
• Serrated Type Drill Rods recommended for heavy-duty rail-guided machines with external rotation, 38mm diameter and above, for higher torque tasks.
• Material Selection: 35SiMnMoV and 24SiMnNi2CrMo steels were compared, with 24SiMnNi2CrMo selected for applications where longer lifespan is required.
• Design and Quality Guidance: Correct rod length, flat end face perpendicular to the axis, connection gap not exceeding 0.5mm, and quenching hardness of HRC 38-45 were specified.

Implementation and Cooperation

Brighttop Global Co., Ltd worked closely with the customer's maintenance and drilling teams throughout the process. The technical team explained the differences between shoulder, eared and serrated drill rods, helped the operator match each machine with the correct rod type, and provided manufacturing and quality control guidance covering CNC machining of the tail and water holes, heat treatment and straightening. Orders were processed promptly, and after-sales support included installation guidance and wear inspection advice.

Results

The structured selection approach allowed the operator to reduce rod-related interruptions and run each drilling machine with the rod design it was built for.

Why Brighttop Global Co., Ltd

This project reflects Brighttop Global Co., Ltd's experience as a drill rod supplier in China and its ability to solve practical drilling problems. Instead of supplying a one-size-fits-all product, the company analyzed the customer's machines and rock conditions, provided clear classification guidance, and cooperated closely with the client from selection to after-sales support. The team's responsiveness and willingness to adjust recommendations as site conditions change helped the operator achieve stable, cost-effective drilling operations.

Contact

For guidance on shoulder type, eared type or serrated type drill rods, or for customized drill rod solutions, contact Brighttop Global Co., Ltd at contact@csrockdrilling.com.