Introduction

The DTH drilling machine is a rugged, high-altitude-ready solution for metal mining and emergency support. With compact transport dimensions of 6,500 × 2,280 × 2,400 mm and an operating weight of 5,340 kg, it is designed to work in fractured rock strata, small blasting holes, and underground roadways. Backed by over a decade of factory expertise and strong R&D capabilities, we can also offer reasonable modifications based on specific customer requirements.

Features

We are a factory with over 10 years of experience in rock drilling equipment. Our DTH drilling machine is engineered specifically for metal mining and high-altitude jobs:

Wet drilling + air-water separation – Dust collection rate >85% (tested), reducing health risks and helping with compliance.

Compressed-air powered, no spark risk – Safe for natural gas extraction and volatile ground conditions.

High-altitude ready – Runs normally at 4,500 m elevation with no power loss.

Low-temperature module – Tested for cold starts down to -30°C.

Powder wet drilling mode – Lowers dust concentration to ≤10 mg/m³, extending separator life.

Factory direct – Spare parts in stock, video-call support for adjustments, and every unit gets a pressure test + hammer cycle test before shipping.

Specification Parameters

Item	Specification

MainSpecifications	KZ-420
Diesel Engine	YCD4T22T-105A 78 kW
Electric Motor	55 kW
Hole Depth	60 m
Hole Diameter	90–203 mm
Drill Pipe Sizes	76 × 3.00 mm
DTH Hammer	4'' / 5'' / 6''
Feed Speed	26 m/min
Rotation Torque (Max.)	5,000 N·m
Rotation Speed	60–140 rpm
Feed Force	35 kN
Feed Type	Chain Cylinder
Pull Up Force (Max.)	80 kN
Traveling Speed (Max.)	25 km/h
Climbing Gradient	25°
Total Weight	5,340 kg
Transportation Dimensions (L×W×H)	6,500 × 2,280 × 2,400 mm

Performance in Working Conditions

Real-world drilling data (granite, hardness index 15):

Wet drilling speed – ~0.35 m/min

Blasting holes (40 mm diameter) – >30 m/day in high-altitude emergency drills

Larger hole option – 36–45 mm diameter

Fractured rock (index <10) – Stable operation where many rigs struggle

Compact design – Suitable for confined spaces and plateau rescue operations

For mining contractors or project managers working in high-altitude or explosive environments, we offer factory-direct pricing and lead times.

Services

We offer a range of optional plans for our DTH pneumatic rock drill, including a 30 kW diesel motor drive. We also provide after-sale services such as a three-month machine warranty and various adaptation options. Contact us to discuss your requirements.

Contact

Choose our drilling machinery for high efficiency, easy operation, and superior craftsmanship - the best choice for your projects. We provide factory-direct pricing, reliable service, and on-time delivery. Contact us today.

FAQ

Q: What causes a DTH pneumatic rock drill to fail to start (excluding crankshaft issues)?

A: Possible causes include poor meshing between the starter and flywheel teeth, malfunction of the fuel injection pump, or binding/seizure of the crankshaft, pistons, or cylinders.

Q: After start-up power insufficient reasons?

A: Pressure below 0.4 MPa, gas pipe leakage, and blockage of the air compressor fault or filter processing: to keep air pressure 0.4 0.63 MPa, check change trachea sealing and clean/filter.

Q: What are the causes of insufficient power after start-up?

A: Possible causes include:

Air pressure below 0.4 MPa

Leakage in the air hose

Air compressor malfunction

Blockage in the filter

Q: What causes dust control failure?

A: Possible causes include:

Dry drilling operation without the dust collection system activated

Blockage in the water pipe or the air-water separator

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