Kaishan Surface Drilling Rigs/Mid-size Crawler DTH Drill Rig Series
KG420BH
The KG420B/KG420BH surface DTH drilling rig is an improved device in compliance with national regulations on diesel-engine emissions. Equipped with the Yuchai four-cylinder engine, the drill rig meets national standards for emissions and environment. The folding frame track and four-wheel drive are adopted; track leveling cylinders and the plunger piston tramming motor improve the working pressure and increase the rotary torque and revolving speed; the lifting oil cylinder and chain are expanded to promote the lifting force and reliability. The thickened profile folder is used for the housing, thus improving its level of intensity and rigidity; and the additional ring makes handling and lifting convenient. The KG420BH surface DTH drilling rig is equipped with a dust collector, thus making operation more environment-friendly and reliable.
Model of drill rig
KG420B
Dimensions & weight — Weight of complete machine
4150 kg
Dimensions & weight — Overall dimensions (L × W × H)
5600 x 2450 x 2350 mm
Drilling capability — Drilling hardness
f = 6-20
Overview
The KG420B/KG420BH surface DTH drilling rig is an improved device in compliance with national regulations on diesel-engine emissions. Equipped with the Yuchai four-cylinder engine, the drill rig meets national standards for emissions and environment. The folding frame track and four-wheel drive are adopted; track leveling cylinders and the plunger piston tramming motor improve the working pressure and increase the rotary torque and revolving speed; the lifting oil cylinder and chain are expanded to promote the lifting force and reliability. The thickened profile folder is used for the housing, thus improving its level of intensity and rigidity; and the additional ring makes handling and lifting convenient. The KG420BH surface DTH drilling rig is equipped with a dust collector, thus making operation more environment-friendly and reliable.
Key highlights
- ✓Yuchai four-cylinder diesel engine meeting national emission and environmental standards.
- ✓Folding frame track with four-wheel drive for rough ground and quick relocation.
- ✓Track leveling cylinders and a plunger-piston tramming motor raise working pressure and increase rotary torque and revolving speed.
- ✓Enlarged lifting oil cylinder and chain increase lifting force and reliability.
- ✓Thickened profile folded housing raises structural strength and rigidity.
- ✓Additional lifting ring makes handling and lifting convenient.
- ✓Dust-collector version KG420BH adds a dust collector for more environmentally friendly, more reliable operation.
Applications: Surface down-the-hole (DTH) drilling of holes from Φ90 mm to 130 mm. · Rock of hardness f = 6-20, at an economical drilling depth of 25 m. · Sites that pair the rig with a portable air compressor: selection depends on hole diameter and air-hose length, and the catalog recommends KSCY550-13, KSCY570/12-550/15 or LGCY17/18-18/15T.
Specifications
Request the current specification sheet for this model using the button above.
Other specifications
| Model of drill rig | KG420B |
Dimensions & weight
| Weight of complete machine | 4150 kg |
| Overall dimensions (L × W × H) | 5600 x 2450 x 2350 mm |
Drilling capability
| Drilling hardness | f = 6-20 |
| Drilling diameter | Φ90-130 mm |
| Depth of economical drilling | 25 m |
| Rotary speed | 0-140 rpm |
| Rotary torque (max) | 2000 N·m |
| Lifting force | 25 kN |
| Method of feed | Cylinder and leaf chain |
| Feed stroke | 3780 mm |
| Travelling speed | 0-2.5 km/h |
| Climbing capacity | ≤30° |
| Ground clearance | 280 mm |
| 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 | 900 mm |
Engine & drive
| Supporting power | Yuchai YC4DK80-T302, 58 kW / 2200 r/min |
| DTH hammer | 3 in, 4 in |
| Drilling rod | Φ64 x 3 m or Φ76 x 3 m |
| Air consumption | 10-17 m³/min |
| Maximum height of horizontal hole | 2750 mm |
| Minimum height of horizontal hole | 350 mm |
| Dust collector (standard configuration) | QZA-90, 8 filter elements |
| Dust collector (alternative configuration) | QZA-120, 12 filter elements |
Applications
- Open-pit mining
- Bench blasting
- Production drilling
Recommended packages
Air compressor match
This rig draws 10-17 m³/min at the hammer (3" or 4"). The standard pairing is a KSCY mobile compressor in the 18-21 m³/min class — e.g. KSCY-310/22 (21 m³/min @ 2.2 MPa) or KSCY-650/20-700/17T (18-19 m³/min dual-mode).
DTH hammer & bits
3" and 4" DTH hammers cover the Φ90-130 mm range — K3/K30C class for 90-105 mm holes, moving up a size for 130 mm holes. Matching button bits order as a set.
Need a complete drilling package? Request a rig + compressor + tooling quote →
Frequently asked questions
What applications suit the KG420BH?
Open-pit mining, Bench blasting, Production drilling.
Which air compressor pairs with the KG420BH?
This rig draws 10-17 m³/min at the hammer (3" or 4"). The standard pairing is a KSCY mobile compressor in the 18-21 m³/min class — e.g. KSCY-310/22 (21 m³/min @ 2.2 MPa) or KSCY-650/20-700/17T (18-19 m³/min dual-mode).
Can the equipment be configured to my project?
Send your project details through the inquiry form and we will confirm the available configuration for the selected model before quotation.