The YT28 Air-Leg Rock Drill is a widely adopted pneumatic tool in the global mining industry. Known for its proven performance and highly durable configuration, this pusher-leg drill is a common choice for railway, highway, and underground mining roadway excavation.
In short, the YT28 combines a large cylinder capacity with straightforward maintenance, making it an efficient tool for blast-hole drilling in medium-hard to hard rock (Protodyakonov scale f=8–18).
🎬 Video Summary: Watch the YT28 pneumatic air-leg rock drill in action during an underground mining test. The video demonstrates its stable thrust and fast penetration rate in hard rock, proving why it's a top choice for tunnel excavation.
| Feature | YT28 (Classic) | YT27 (Stable) | YT29A (Heavy-Duty) |
|---|---|---|---|
| Weight | 26.5 kg | 27 kg | 26.5 kg |
| Cylinder Dia. | 80–82 mm | 80 mm | 82 mm |
| Impact Energy | ≥ 70–78 J | ≥ 75.5 J | ≥ 78 J |
| Best Application | General tunneling | Steady drilling | High-speed advance |
Air Requirement: ≤ 88 L/s (≈ 186 CFM) per drill. A stable 0.5–0.63 MPa pressure is recommended.
Water Flushing: Stable flow at 0.2–0.3 MPa is strongly recommended for dust suppression.
Matched Tooling: Hex 22x108mm shank + tapered drill rods + 34–45 mm button bits.
📄 Download YT28 Technical Data Sheet (PDF)
| Parameter | Value | Unit |
|---|---|---|
| Weight | 26.5 | kg |
| Size (L×W×H) | 659 x 248 x 205 | mm |
| Cylinder Diameter | 80–82 mm (varies by batch) | mm |
| Working Air Pressure | 0.40 ~ 0.63 | MPa |
| Impact Energy | ≥ 70 - 78 (@ 0.63 MPa) | J |
| Air Hose / Water Hose Dia. | 25 / 13 | mm |
| Max. Drilling Depth | 5 | m |
*Test conditions: measured at tool inlet. Compressor capacity and bit sharpness affect actual performance.
| Working Pressure | 0.40 MPa | 0.50 MPa | 0.63 MPa |
|---|---|---|---|
| Impact Energy (J) | ≥ 44 | ≥ 63 | ≥ 70–78 |
| Air Consumption (L/s) | ≤ 52 | ≤ 58 | ≤ 82–88 |
| Drilling Speed (mm/min) | ≥ 250 | ≥ 400 | ≥ 470 |
| Model | Details | Weight (kg) |
|---|---|---|
| FT160A Air Leg | 1668 mm Length | 17 |
| FT160BC Air Leg | Heavy-duty tunneling thrust | 19 |
| FY250B Oiler | 0.25 L Lubricator Capacity | 1.2 |
After drilling fast blast-holes with the YT28, achieve vibration-free rock breaking using our:
👉 Expandag Stone Cracking Powder (HSCA)
We supply a full range of YT28 spare parts for global maintenance. Commonly requested components include:
| Core Spare Part (English) | System / Function |
|---|---|
| Piston (80-82mm) | Main Drill: Delivers heavy-duty impact |
| Rifle Bar & Nut | Main Drill: Controls the bit rotation mechanism |
| Water / Air Tube | Main Drill: Vital for dust suppression |
| Valve Chest Assembly | Main Drill: Pneumatic distribution center |
| O-Ring & Seal Kit | Consumable: Prevents internal pressure loss |
Q: Is the YT28 suitable for underground mining?
A: Yes, for underground mining, wet drilling is strongly recommended for dust suppression. Dry drilling is not recommended for long continuous operation; always ensure proper lubrication and cooling.
Troubleshooting: Why is my YT28 penetration speed dropping?
A: Check if your bits are dull, ensure the compressor delivers stable 0.63 MPa, and verify the FY250B oiler is full of rock drill oil to reduce friction.
✔️ Factory Direct | ✔️ Full Spare Parts Support | ✔️ Worldwide Shipping Support
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