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
Equipped with powerful four-cylinder Yuchai diesel engines (58 kW on KG420T; upgraded 73.5 kW on KG420TH to power the dust collector), fully compliant with national off-road emission standards while optimizing torque output and fuel economy.
Features a folded crawler chassis, standard engineering four-wheel belt, and hydraulic track leveling cylinders (±10° oscillation) driven by high-pressure plunger tramming motors for 30° gradeability on steep quarry slopes.
Upgraded rotary motor generates 3,500 N·m maximum torque at 0–90 rpm, paired with a heavy-duty hydraulic cylinder and roller chain delivering 40 kN lifting force to drill ⌀90–152 mm blast holes without drill-string jamming.
The KG420TH model integrates a standard QZA-120 high-capacity dry cyclone dust collector (12 filter elements, upgradable to QZA-140 with 16 elements for holes >130 mm), ensuring clean, safe, and environmentally compliant operations.
| Model of drill rig | KG420T | KG420TH |
|---|---|---|
| Weight of complete machine | 5050KG | 5350KG |
| Outer dimensions | 5300×2250×2400mm | 5300×2450×2400mm |
| Drilling hardness | f=6-20 | |
| Drilling diameter | Φ90-152mm | |
| Depth of economical drilling | 25m | |
| Rotary speed | 0-90rpm | |
| Rotary torque (Max) | 3500N·m (Max) | |
| Lifting force | 40KN | |
| Method of Feed | Oil cylinder+roller chain | |
| Feed stroke | 3175mm | |
| Travelling speed | 0-2.5km/h | |
| Climbing capacity | ≤30° | |
| Ground clearance | 280mm | |
| Tilt angle of beam | Down: 135°, up: 50°, total: 185° | |
| Swing angle of beam | Left: 100°, right: 45°, total: 145° | |
| Pitch angle of drill boom | Down: 50°, up: 25°, total: 75° | |
| Swing angle of drill boom | Left: 44°, right: 45°, total: 89° | |
| Leveling angle of track | ±10° | |
| Compensation length of beam | 900mm | |
| Supporting power | Yuchai YC4DK80-T302 (58 KW / 2200r/min) | Yuchai YC4DK100-T304 (73.5 KW / 2200r/min) |
| DTH hammer | 4" | |
| Drilling rod | Φ76×2m + Φ76×3m | |
| Air consumption | 13-20m³/min | |
| Maximum height of horizontal hole | 2750mm | |
| Minimum height of horizontal hole | 350mm | |
| Dust collector | None | Standard: QZA-120 (12 filter elements) Alternative: QZA-140 (16 filter elements) |
Note: When the hole diameter of the dust collector exceeds Φ130mm, the dust collector must be upgraded and enlarged.
Diesel Engine Portable Screw Air Compressor:
Note: Air compressor selection is subject to hole diameter and air hose length.
A: The KG420TH is equipped with an integrated QZA-120/140 industrial cyclone dust collector. The upgraded 73.5 kW Yuchai YC4DK100 engine ensures ample hydraulic power to drive both the heavy drilling operations and the high-flow suction fan simultaneously without power loss.
A: The KG420T expands maximum drilling diameter from 130 mm to 152 mm, increases rotary torque from 2,000 N·m to 3,500 N·m, and increases lifting force from 25 kN to 40 kN with a roller chain feed system, making it significantly more robust in complex rock strata.
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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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