Addressing key construction challenges in open-pit mining—such as soft rock, frequent fault zones, and fractured, unstable rock masses—our company has developed a PDC diamond‑tipped scraper drill bit specifically for drilling and blasting. This product has undergone field testing at mining sites in Xinjiang and in numerous overseas open-pit projects, earning high praise from customers thanks to its outstanding overall performance.

Figure 1: Overseas test footage of the five-blade scraper drill bit (cumulative drilling depth of 12,000 m).

PDC diamond drill bits are specialized drilling tools that use polycrystalline diamond compact (PDC) cutters as the primary cutting element. They rely on the shear action of the PDC cutter to penetrate rock formations, distinguishing them from conventional down-the-hole and tricone bits. These bits are well-suited for blast‑hole drilling operations in open‑pit mines and offer versatile performance across all geological formations.

Traditional drill bits face significant limitations when drilling through complex formations: down-the-hole bits are prone to breakage and premature failure, while tricone bits suffer rapid wear and short service lives. Our company’s PDC drill bit effectively addresses these industry challenges, delivering a substantial boost in penetration rate and single‑bit footage. Equipped with features such as alloy gauge protectors, composite‑insert gauges, hybrid gauges, and dual‑row cutter arrangements, it offers broad formation compatibility, reduced overall wear, and consistently uniform borehole diameters over extended drilling campaigns.

The product employs a high‑end brazing process, ensuring tight bonding between the composite insert and the steel body, with excellent shear strength. Under heavy‑vibration conditions during rock‑breaking operations, it resists tooth loss and insert chipping. The entire production process is supported by high‑precision CNC machining equipment, delivering high processing efficiency and consistent, uniform dimensional and mechanical properties, enabling reliable, large‑volume supply.

This series of drill bits features a threaded connection, allowing direct coupling with drill rods or assembly with drill‑rod couplings. The drill rods are equipped with API‑standard female tapered connections, compatible with large‑diameter drill rods, capable of handling high torque output, and suitable for mainstream surface rock‑drilling rigs on the market.

Figure 2: Finished product image of a five-blade scraper drill bit

In terms of model selection, we offer a wide range of composite inserts, various numbers of blades, and multiple structural reinforcement designs, allowing customers to freely combine components based on their specific operating conditions and customize exclusive PDC diamond scraper drill bits.

Figure 3: Recommended Number of Blades for Selection

Figure 4: Recommended Selection of Composite Chips

Field‑use data show that, after replacing conventional drill bits, the frequency of bit changes in mining operations has dropped significantly, leading to a marked reduction in rig idle time and overall construction costs for labor and spare parts. Moreover, borehole quality has improved, effectively boosting the overall efficiency of open‑pit drilling and blasting. Moving forward, our company will continue to refine its product portfolio and introduce specialized, customized models, delivering high‑efficiency, durable drilling solutions to open‑pit mines worldwide.

Rock Drilling Tools Division

New Product Line, PDC Products Department

2026.6.24