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 (f=8–18).
🎬 Video Summary: Watch the YT28 pneumatic rock drill in underground action, demonstrating stable thrust and fast penetration rate in hard rock.
| Feature | YT28 (Classic) | YT27 (Stable) | YT29A (Heavy-Duty) |
|---|---|---|---|
| Weight | 26.5 kg | 27 kg | 26.5 kg |
| Impact Energy | ≥ 70–78 J | ≥ 75.5 J | ≥ 78 J |
| Best Application | General tunneling | Steady drilling | High-speed advance |
📄 Download YT28 Technical Data Sheet (PDF)
| Parameter | Value | Unit |
|---|---|---|
| Working Air Pressure | 0.40 ~ 0.63 | MPa |
| Impact Energy (@ 0.63 MPa) | ≥ 70 - 78 | J |
| Air Consumption | ≤ 81 | L/s |
| Drilling Speed | ≥ 250 - 470 | mm/min |
| Core Spare Part | System / Function |
|---|---|
| Piston (80-82mm) | Main Drill: High-frequency impact. |
| Rifle Bar & Nut | Main Drill: Internal rotation control. |
| Valve Chest Assembly | Main Drill: Pneumatic air distribution. |
| Water / Air Tube | Main Drill: Wet drilling dust suppression. |
| O-Ring & Seal Kit | Consumable: Prevents internal pressure loss. |
Use the powerful YT28 to drill blast holes, then apply our Expandag HSCA for silent rock breaking.
Q: Is the YT28 suitable for underground mining?
A: Yes, for underground mining, wet drilling is strongly recommended for dust suppression. Always ensure proper lubrication.
Q: Why is my YT28 penetration speed dropping?
A: Check for dull bits, unstable air pressure, or low rock drill oil in the FY250B oiler.
Q: Are YT28 spare parts compatible globally?
A: Yes. All YT28 components from Expandag are manufactured to original technical drawings, ensuring full compatibility with global standards.
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