Shen li machinery....

S250 Excels in Sandstone Roadway Construction

SHNELI

S250 Air Leg Rock Drill

Sandstone layers require speed but not overly aggressive force. The S250 pneumatic rock drill offers an ideal balance — fast penetration without unnecessary vibration. Construction teams benefit from stable hole quality, smoother blasting cycles, and improved visibility thanks to reduced dust kickback.

From our factory floor to the rock face, the S250 is engineered for simplicity and endurance. It connects directly to standard air supply lines (recommended pressure: 0.4–0.63 MPa). Operators start by securing the rig, aligning the drill steel, and opening the air valve. The leg adjusts easily for angled or vertical holes, while the built-in water flush keeps the bit cool and clears cuttings in real time. Regular greasing of the chuck and periodic inspection of the piston seals are all it takes to maintain peak performance shift after shift.

Before introducing the S250, many sandstone roadway projects struggled with inconsistent advance rates. Drill rigs with excessive force often fractured the rock, leading to overbreak and unstable contours. Other models, while gentler, proved too slow, causing blasting delays and crew downtime. Since switching to the S250, site managers report a visible change. Daily drilling footage has increased by an average of 18–22%, thanks to the tool’s optimized impact frequency and rapid chip removal. Drill steel consumption dropped because the machine’s action avoids jarring side-load. Perhaps most noticeably, the working environment improved: less airborne dust and reduced “chatter” meant operators could position holes more accurately and complete rounds faster.

As a specialized manufacturer of rock drilling equipment, we focus solely on building robust, task-matched machinery. Our production process—from forging housings to assembling valves—is controlled in-house, allowing us to tailor tools like the S250 for specific formations. This dedicated approach ensures each unit delivers reliable performance where it matters most: at the face, under real load, day after day.

The S250 proves that effective sandstone drilling isn’t about raw power; it’s about precision impulse transfer. The drill’s internal valve system meters air to deliver a rapid sequence of blows—each sufficient to fracture the rock but calibrated to avoid wasting energy as vibration. This translates directly into straighter, cleaner boreholes with less wear on consumables. For contractors, that means fewer redrills, more efficient explosive charging, and predictable advance per shift.

On site, the human factor matters. The S250’s reduced recoil and lighter leg assembly allow a single operator to handle repositioning without fatigue. The air‑motor leg provides smooth extension even in damp conditions, maintaining feed pressure consistently. These details shorten the learning curve for new crew members and help seasoned drillers maintain rhythm through long rounds.

In summary, the S250 pneumatic rock drill turns the particular challenges of sandstone into a routine operation. It combines speed with control, durability with ease of service, and consistent results with improved working conditions. For teams driving roadway development through soft to medium rock, it represents a tangible step forward in daily productivity and project predictability.

 

Post time: Dec-16-2025
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