Featured Granite Quarrying Equipment
Industrial Status & Demand for YT28 in Granite Quarrying
Granite quarrying represents one of the most demanding sub-sectors of the global mining and dimension stone industries. Characterized by high compressive strength, abrasiveness, and density, granite requires drilling equipment that can withstand immense mechanical stress while delivering consistent penetration rates. The YT28 Air Leg Rock Drill has established itself as the global benchmark for handheld percussive drilling in granite quarries. In the modern industrial landscape, where efficiency and cost-per-meter are heavily scrutinized, pneumatic air leg drills bridge the gap between manual labor and heavy, capital-intensive hydraulic drilling rigs.
Globally, the demand for granite blocks for construction, monumental masonry, and infrastructure projects continues to grow. This has intensified the pressure on quarry operators to maximize yield while minimizing block damage. The percussive technology of the YT28 is highly favored because it allows for precise, micro-crack-free line drilling. Unlike heavy blast hole rigs that can destabilize the internal crystal structure of high-value dimension stone, the YT28 offers localized, high-impact force that ensures clean splits when paired with plug-and-feather splitting methods.
High Percussive Frequency
Delivers rapid blow frequency designed to crush highly abrasive quartz-rich granite without excessive bit wear.
Ergonomic Air Leg Control
Pneumatic thrust controls on the FT160 air leg minimize physical fatigue, allowing operators to drill consistently for longer shifts.
Flushing & Dust Control
Integrated water-flushing mechanism clears granite cuttings instantly from the hole, preventing jamming and reducing airborne silica dust.
Deep Application Scenarios of YT28 in Granite Extraction
The application of the YT28 in granite quarries is diverse and highly specialized. In dimension stone quarrying, the primary objective is to extract large, rectangular blocks of granite without cracking them. The process begins with the identification of natural cleavage planes (referred to as the rift and grain). Operators utilize the YT28 mounted on its air leg to drill a series of coplanar, parallel holes along these lines. This technique, known as line drilling or stitch drilling, requires extreme precision. The air leg ensures that every hole is drilled at the exact same angle, preventing the split from wandering and ruining the block geometry.
Another critical scenario is horizontal toe-hole drilling. In bench quarrying, removing the bottom lift requires drilling horizontal holes at the base of the rock face. This is physically demanding and dangerous without mechanized support. The pneumatic leg of the YT28 supports the weight of the drill and provides the forward thrust, enabling horizontal drilling just inches above the quarry floor. The drill’s strong rotation torque prevents the steel from binding, even when encountering varying rock hardness and internal stresses common in deep granite formations.
Furthermore, in remote or mountainous quarry sites where large machinery cannot access, the portability of the YT28 is unmatched. It can be easily transported by a small team and powered by mobile diesel compressors, making it the ideal tool for opening new quarry benches, clearing overburden, and performing secondary block splitting on site.
Future Trends in Pneumatic Quarrying Technology
As environmental regulations tighten and labor costs rise, the pneumatic tool industry is undergoing a significant transformation. The development of rock drills like the YT28 is focusing heavily on three areas: energy efficiency, operator safety, and material longevity. Modern compressors are highly efficient, but the pneumatic tools themselves must also optimize air consumption. Advanced internal valve designs within the YT28 are being engineered to maximize percussive energy while reducing the volume of compressed air required per minute (CFM), directly lowering fuel consumption at the compressor end.
Operator health is another major trend driving innovation. Hand-Arm Vibration Syndrome (HAVS) and silicosis are serious occupational hazards in granite quarries. Future iterations of the YT28 incorporate advanced vibration-damping handles and shock-absorbing materials that isolate the operator from the intense percussive feedback. Additionally, state-of-the-art wet-drilling configurations ensure complete suppression of fine silica dust, creating a safer working environment in compliance with international health standards.
Finally, metallurgy plays a vital role. The use of high-alloy steel, coupled with advanced carburizing and heat treatment processes, ensures that the internal components of the drill—such as the rifle bar, piston, and chuck—have a significantly longer service life, reducing downtime and spare parts costs for quarry operators.
Company Profile
SHENLI is a leading supplier of superior pneumatic tools for the construction, mining and industrial markets. Since 2005, the Shenley brand has been synonymous with quality and innovation.
For over a decade, the SHENLI brand has represented performance, innovation and quality in the pneumatic tool industry. The SHENLI product line now offers a complete line of pneumatic tools, a wholly owned factory, pneumatic tools and a full line of accessories. With superior product performance, as well as superior product and reliability, competitive pricing for factory direct sellers, exceptionally ergonomically designed tools and quality warranty terms, Shenley has become an industry leader. We take every customer's problem seriously so that we can solve our common problems, and choosing Shenley is just the beginning for you. SHENLI will provide reliable service and support through every step of the process from product consultation to final delivery.
Company Mission & Culture
Striving to be a world-class supplier of rock drill
Adhering to the development experience of pneumatic tools for many years, Shenli takes "customer first, service first" as the spirit of enterprise, and "strive to become the world's first-class rock drill provider" as the vision, constantly innovate technology, strive for perfection, and open up a broader market for customers.
More attentive: Work together, keep improving
More Focused: With sincerity, you can achieve anything.
More thoughtful: Customer first, service first
Dare to innovate: Keeping up with the times and forging ahead
Global Granite Quarrying & Excavation Cases
Dutch Granite Excavation Project
The Dutch customer came to our factory and was satisfied with the production equipment, raw materials as well as advanced processes that we have in place. The client then signed a custom order for 500 units after being shown all of these great things about what is possible here at this facility! They hope long-term cooperation can occur between both parties moving forward since they are happy overall from their visit today.
U.S. Granite Dimension Stone Excavation
The American customer visits our factory and has an in-depth negotiation to reach a long-term cooperation relationship, focusing on the procurement of heavy-duty pneumatic rock drills for granite extraction sites in the US.
Japanese Precision Granite Quarrying
The Japanese customer was very satisfied with the factory equipment and production process. He also proposed that they work together on design, which would give them an edge over their competitors who do not have this partnership!
India Granite Mining & Infrastructure Project
We are delighted that Indian customers have visited our factory to learn more about ISO 9001 certification, which opens up new opportunities for us to collaborate. We explained in detail which parts go to which products, and how many different assembly lines there are, and we all understood. He is looking forward to working with us. This is our first cooperation, and we still maintain a cooperative relationship.
Factory Tour & Manufacturing Excellence
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Raw Materials
All materials are sourced from domestic and international well-known suppliers, and the quality is free from any flaws.
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Processing
We have all precision machining production lines, including high-precision CNC lathes, and multi-axis CNC milling machines. Machine tools are from well-known brands, and online quality assurance is performed at every step.
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Heat Treatment
All heat treatment activities are carried out in a sealed quench furnace with facilities including but not limited to carburizing, nitriding, volume quenching, annealing, and tempering.
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Grinding
We have world-class grinding equipment that is capable of maintaining dimensions to within 3 microns. The grinding line includes state-of-the-art equipment including universal CNC grinding machines, cylindrical CNC grinding machines with process gauges, CNC internal diameter grinding machines, and universal CNC grinding machines.
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Surface Treatment
We offer a range of surface treatment options painting and other processes. These processes increase the service life of the tools and provide them with an appearance that meets the customer's requirements.
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Assembly & Commissioning
Assembly and testing are carried out by our dedicated team on custom-built assembly platforms and test machines. Each assembled rock drill is tested for torque, BPM, and air consumption. After successful testing, each machine receives a test certificate to ensure its quality.
Quality Control & Standards
Quality Standards
1. Customer satisfaction is achieved through the provision of 'zero defect' products and timely delivery.
2. Ensuring an orderly programme.
3. Increased production efficiency through the latest technology and equipment.
4. The company provides regular training to its employees in accordance with the defined objectives, training needs and requirements.
Our Certifications
Shenli is ISO 9001:2015 certified. We strive to constantly monitor and improve our processes to ensure the highest quality products. Experienced quality inspectors use a variety of precision instruments and special gauges to test the dimensional and functional performance of all components. Regular internal and external quality audits are carried out to continuously improve quality.
CE certification is a mandatory conformity mark for certain products sold within the European Economic Area (EEA). CE stands for "Conformité Européenne" which translates to "European Conformity." The CE mark certifies that a product has met EU consumer safety, health or environmental requirements. CE certification also allows manufacturers to freely circulate their products within the EEA. ISO 9001:2015 is an international quality management system (QMS) standard that outlines requirements for a quality management system. The standard is designed to help organizations ensure they meet customer and regulatory requirements. Our factory has been ISO 9001:2015 certified since 2015, and all of our products are CE certified. This ensures that our products meet high standards of quality and safety, and that they can be freely circulated within the EU. CE certification and ISO 9001:2015 certification are just two of the ways we ensure that our products are of the highest quality.
Complete Mining & Construction Product Range
