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MSD (Zhuzhou Jingde Machinery Co., Ltd.) is a China-based rock drilling tools manufacturer with 23+ years of experience, trusted by 500+ drilling contractors across 40+ countries. This case study documents how MSD's T51-115mm standard thread button bit delivered 25% faster drilling speed and 30% longer service life at a granite quarry in Queensland, Australia—enabling the contractor to complete the project one week ahead of schedule.
A leading quarry contractor in Queensland undertook a blast hole drilling project at a large granite quarry. The operating conditions were demanding:
| Condition | Detail |
|---|---|
| Rock type | Granite |
| Hardness | Mohs 7 |
| Compressive strength | ~200 MPa |
| Project pressure | Tight delivery schedule with daily cost implications |
The initially used bits drilled slowly with high consumption rates, putting the project timeline at risk. The contractor's technical procurement team began searching for a supplier offering more stable performance and higher drilling efficiency.
After evaluating multiple brands, the contractor selected MSD's T51-115mm standard thread button bit for field testing:
| Feature | Specification | Advantage |
|---|---|---|
| Carbide grade | YK05 premium tungsten carbide | High hardness + toughness for Mohs 7 granite |
| Crown design | Optimized button layout | Even load distribution, efficient rock breaking |
| Application match | Engineered for medium-hard rock | Ideal for granite quarry conditions |
The MSD bits quickly validated their performance on site. Data recorded by the contractor's project team:
Drilling Speed:
Particularly notable in hard granite layers. Average improvement across all blast holes.
Bit Service Life:
Uniform, controlled wear pattern extended bit longevity significantly.
Replacement Frequency:
Reduced downtime through longer bit operational periods.
Hole Quality:
Consistent straightness and uniform blast distribution throughout project.
Key result: Stable performance and fewer bit replacements enabled the contractor to complete the entire blast hole drilling project one week ahead of the original schedule.
"For quarry projects like ours where costs are calculated daily, drilling speed directly impacts profitability. MSD's thread bits performed consistently—fast drilling, straight holes. This not only saved on tooling costs but, more importantly, helped us gain valuable time, allowing the project to finish early."
For granite and similar medium-hard rock (Mohs 6-8, 150-250 MPa), standard thread button bits with premium carbide grades typically outperform economy bits by 20-30% in both speed and life. The cost difference is recovered within the first project cycle through reduced replacements and faster completion.
Q1: What thread types does MSD offer for surface drilling?
MSD supplies all standard thread types including T38, T45, T51, and GT60. Contact us with your drill rig specifications for thread matching.
Q2: What bit diameters are available for the T51 thread?
MSD T51 thread button bits are available from 89mm to 127mm diameter. The 115mm size in this case study is our most popular for quarry blast hole applications.
Q3: How does MSD ensure consistent bit quality?
MSD maintains strict quality control with body breakage rate<0.1%, insert breakage <1%, and insert fallout <0.05% (factory data). Every bit undergoes visual and dimensional inspection before shipping.
Q4: Can MSD supply retrac design bits for quarry use?
Yes. MSD offers retrac (retrieval) design thread button bits that reduce stuck drill string risk by over 90% compared to standard designs. Recommended for fractured formations or deep holes.
Contact us for a customized solution assessment.
Technical content reviewed by MSD Engineering Team. ISO 9001 Certified.
MSD's engineering team specializes in systematic diagnostics to identify weak points in your drilling operations. We don't just sell tools—we optimize your entire system.
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