Official Export Subsidiary of Kaishan Group (Est. 1956) | Quzhou Manufacturing Base
Our Quzhou engineering desk calculates the exact borehole diameter, rock hardness, and necessary CFM/Bar ratio for your project.
Category Showcase
Kaishan DTH Drilling Rigs
Heavy-duty surface crawlers and integrated rigs for open-pit mining, quarry blasting, and slope stabilization. High penetration rate and anti-jamming hydraulic system.
EQUIPMENT CATEGORIES
Engineered for open-pit mining, quarrying, and blasting hole construction. The KG726III / KG726HIII air down-the-hole (DTH) drill rig combines high torque, robust climbing ability, and national environmental compliance to deliver superior drilling efficiency up to 25m depth.

Equipped with a high-torque Yuchai China-III emission standard diesel engine (59 kW), ensuring strict environmental compliance, fuel economy, and reliable performance in high-dust quarrying environments.
Features a plunger-piston ramming motor and four-wheel track drive that significantly enhance operating pressure, gradeability (climbing capacity up to 30°), and off-road stability across rugged terrain.
Expanded pitch and dual-cylinder lifting arm meet extreme position requirements. Minimum horizontal hole height reaches down to 350 mm, while maximum reach extends to 2750 mm.
Heavy-gauge thickened profile housing ensures long service life. Includes dedicated lifting rings for secure transit and crane handling on and off job sites.
The feed guide rail is installed at an ergonomic tilt angle, providing operators with unobstructed observation of hole collar positioning and smoother rod changing operations.
The KG726HIII model is equipped with an integrated high-efficiency dry dust collector to maintain clean breathing zones and comply with green mine regulations.
The KG726 series is designed for heavy-duty rock drilling applications with rock hardness ratings from f = 6 to 20:

| Parameter / Specification | KG726III | KG726HIII (Dust Collector) |
|---|---|---|
| Overall Machine Weight | 4,200 kg | 4,400 kg |
| Outer Dimensions (L × W × H) | 5600 × 2400 × 2300 mm | 5600 × 2600 × 2300 mm |
| Drillable Rock Hardness | f = 6 – 20 | |
| Drilling Diameter | Φ90 – 115 mm | |
| Economical Drilling Depth | 25 m | |
| Rotary Speed | 0 – 120 rpm | |
| Max Rotary Torque | 2000 N·m | |
| Lifting Force | 18 kN | |
| Feed Method & Stroke | Oil cylinder – leaf chain / 3780 mm | |
| Travelling Speed & Climbing Ability | 0 – 2.5 km/h / ≤ 30° | |
| Ground Clearance | 350 mm | |
| Tilt Angle of Boom (Up / Down / Total) | Up: 50° / Down: 135° / Total: 185° | |
| Parameter | KG726III | KG726HIII (Dust Collector) |
|---|---|---|
| Operating Weight | 4,200 kg | 4,400 kg |
| Dimensions (L × W × H) | 5600 × 2400 × 2300 mm | 5600 × 2600 × 2300 mm |
| Drillable Rock Hardness | f = 6 – 20 | |
| Drilling Diameter | Φ90 – 115 mm | |
| Economical Drilling Depth | 25 m | |
| Rotary Speed | 0 – 120 rpm | |
| Max Rotary Torque | 2000 N·m | |
| Lifting Force | 18 kN | |
| Feed Mechanism / Feed Stroke | Oil cylinder – leaf chain / 3780 mm | |
| Travelling Speed / Gradeability | 0 – 2.5 km/h / ≤ 30° | |
| Ground Clearance | 350 mm | |
| Boom Tilt Angle | Down 135°, Up 50° (Total 185°) | |
| Boom Swing Angle | Left 100°, Right 45° (Total 145°) | |
| Drill Boom Pitch Angle | Down 50°, Up 25° (Total 75°) | |
| Drill Boom Swing Angle | Left 44°, Right 45° (Total 89°) | |
| Guide Beam Compensation Length | 900 mm | |
| Engine Model & Power | Yuchai YCD4R23T8-80 (59 kW / 2400 rpm) | |
| Equipped DTH Hammer / Drill Rod | M30 / Φ64 × 3000 mm | |
| Recommended Air Consumption | 9 – 17 m³/min | |
| Horizontal Hole Height (Min / Max) | 350 mm / 2750 mm | |
Contact our technical sales team for matching portable air compressors, drill tools, and factory-direct pricing.
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Founded in 2022 in Quzhou City, Zhejiang Province. Operating as the global integrated export arm of Kaishan Group, delivering heavy-duty DTH drill rigs, water well exploration machinery, and screw air compressors worldwide.
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