YT29A Heavy-Duty Air Leg Rock Drill (Pusher Leg Tunneling Machine)

YT29A Heavy-Duty Air Leg Rock Drill (Pusher Leg Tunneling Expert)

The YT29A Air-Leg Rock Drill (Jack Leg) is the most powerful pneumatic machine in the Topking YT series.
           Widely recognized as the industry standard for modern tunneling and underground mining, it delivers superior impact energy (≥78J) for rapid excavation in hard rock (f=8~18).

Typical Applications

• Underground hard rock mining & ore extraction

• Railway and highway tunnel excavation

• Hydropower station tunneling and dam construction

• Heavy-duty quarry drilling operations

Key Features & Advantages

● Superior Power (≥78J): Devastating impact energy ensures the fastest penetration in super-hard rock.

● Optimized Control: Grouped backhead mechanism allows for quick start-up and responsive handling.

● High Torque (≥20 N·m): Prevents drill rod jamming even in extremely deep holes.

● Robust Durability: Heavy-duty forged steel body built for extremely long service life.

Model Comparison: YT29A vs YT28

YT29A Parts Diagrams & Spares

Commonly requested spare parts for maintenance:

💡 Total Solution: Drill & Expand

Use the YT29A to drill blast holes, then apply our HSCA:
           Expandag Soundless Cracking Agent

FAQ

Q1: What is the difference between YT28 and YT29A?

A: YT29A is the heavy-duty model with ≥78J impact energy, designed for faster drilling in super-hard rock compared to YT28.

Q2: Can I use it as a hand-held drill?

A: No. Due to its 27kg weight and recoil, it must be mounted on FT160A or FT170 pusher legs.

Q3: What drill bits are compatible?

A: YT29A uses H22 x 108 mm shank steels and is compatible with all standard tapered drill rods and bits.

           Get YT29A Price & Parts List