📦 Surface Mining Drilling Rigs

Kaishan KG420B DTH Drilling Rig

Name: Kaishan KG420B DTH Drilling Rig
Brand: Kaishan
SKU: KG420B
Availability: InStock

Model: KG420B

The Kaishan KG420B is a high-performance DTH drilling rig designed for demanding open-pit mining, quarrying, and water well applications. Featuring a robust track-mounted chassis and a powerful diesel engine, this rig delivers efficient drilling in hard rock formations. With a maximum drilling depth of 25 meters and a hole diameter range of 90-130 mm, the KG420B ensures precise and rapid hole completion. Its advanced rotary head and reliable dust suppression system enhance productivity while minimizing environmental impact. Ideal for contractors seeking a versatile and durable drilling solution, the KG420B combines Kaishan's renowned engineering with user-friendly operation and low maintenance costs. Whether for blast hole drilling or water well construction, this rig stands out as a reliable partner in challenging terrains.

Best For

Open-Pit Mining Quarrying Water Well Drilling Construction Foundation

Technical Specifications

Model	Kaishan KG420B
Drilling Depth	25 m
Hole Diameter	90-130 mm
Drilling Method	Down-the-Hole (DTH)
Engine Power	58 kW
Weight	4,150 / 4,350 kg
Dimension (L×W×H)	7,500 × 2,300 × 3,000 mm

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview The Kaishan KG420B is a track-mounted down-the-hole (DTH) drilling rig engineered for high-efficiency drilling in hard rock conditions. As a leading model in Kaishan's DTH series, it integrates a powerful diesel engine, a robust rotary head, and an advanced dust collection system to deliver superior performance in mining, quarrying, and water well projects. Its compact design and excellent mobility make it suitable for various terrains, from rugged mountains to urban construction sites. ## Technical Features The KG420B boasts a maximum drilling depth of 25 meters and supports hole diameters from 90 to 130 mm, making it versatile for different applications. The rig is equipped with a high-torque rotary head and a reliable DTH hammer, ensuring fast penetration rates in hard formations. The hydraulic system provides smooth and precise control, while the automatic rod changer (optional) enhances operational efficiency. The powerful diesel engine, rated at 58 kW, delivers reliable power even in remote areas. Additionally, the rig features a spacious operator cabin with ergonomic controls, reducing fatigue during long shifts. ## Applications The KG420B excels in open-pit mining, where it drills blast holes with precision and speed. In quarrying, it efficiently handles rock fragmentation for aggregate production. For water well drilling, the rig's DTH capability ensures clean and straight holes, essential for reliable water extraction. It is also suitable for foundation drilling in construction projects, thanks to its adaptability and mobility. With its robust construction and advanced features, the KG420B is a dependable choice for contractors worldwide.

Technical Selection

Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.

Hole Diameter

90-130 mm

Drilling Depth

25 m

Engine Power

58 kW

Weight

4,150 / 4,350 kg

Dimension (L×W×H)

7,500 × 2,300 × 3,000 mm

Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.

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Key Advantages

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Powerful 58 kW diesel engine for reliable performance in remote areas

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Track-mounted chassis for excellent mobility on rough terrain

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Maximum drilling depth of 25 meters and hole diameter range of 90-130 mm

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High-torque rotary head and DTH hammer for fast penetration in hard rock

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Advanced dust suppression system for environmentally friendly operation

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Ergonomic operator cabin with intuitive controls for reduced fatigue

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Optional automatic rod changer for increased productivity

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Robust construction and low maintenance design for extended service life

Applications

📍 Open-Pit Mining

Drilling blast holes in hard rock formations for mineral extraction.

Solution: The KG420B's powerful DTH hammer and high torque ensure rapid hole completion, optimizing blasting efficiency and reducing overall mining costs.

📍 Quarrying

Production of aggregates through precise blast hole drilling.

Solution: With a hole diameter range of 90-130 mm, the rig delivers consistent hole quality, enhancing fragmentation and reducing secondary breaking.

📍 Water Well Drilling

Constructing water wells in rural and remote areas.

Solution: The KG420B's DTH capability ensures straight, clean holes, while its mobility allows access to challenging locations, providing reliable water access.

📍 Construction Foundation

Drilling for foundation piles and anchoring in construction projects.

Solution: The rig's precise control and versatility enable accurate hole placement, ensuring structural integrity and efficient project timelines.

KG Series Models

Compare specifications across the series to find the right model.

Model	Model	Drilling Depth	Hole Diameter	Drilling Method	Engine Power	Inquire
KG420BThis model	Kaishan KG420B	25 m	90-130 mm	Down-the-Hole (DTH)	58 kW	Get a Quote
KG430	Kaishan KG430	30 m	90–165 mm	DTH (Down-The-Hole)	73 kW	Get a Quote
KG520	Kaishan KG520	30 m (single pass); 100 m (with extension rods)	90–165 mm	Down-The-Hole (DTH) drilling	194 kW (260 HP)	Get a Quote
KG590	Kaishan KG590	30 m	90–165 mm	DTH (Down-The-Hole) Hammer Drilling	194 kW (260 HP)	Get a Quote
KG590H	KG590H	25 m	105-152 mm	DTH (Down-The-Hole) Drilling	194 kW (260 HP)	Get a Quote
KG720	Kaishan KG720	30 m	90–165 mm	Down-the-Hole (DTH) Drilling	194 kW	Get a Quote
KG550	KG550	30 m	115–165 mm	DTH (Down-The-Hole) hammer drilling	73.5 kW	Get a Quote
KG940A	KG940A	30 m	90–165 mm	DTH (Down-The-Hole)	58 kW	Get a Quote
KG920A	Kaishan KG920A	25 m	90–165 mm	DTH (Down-The-Hole) Hammer	118 kW (158 hp)	Get a Quote
KG920B	KG920B	25 m	90-165 mm	DTH (Down-The-Hole)	194 kW	Get a Quote
KG920D	Kaishan KG920D	25 m	90–165 mm	Down-the-Hole (DTH) Hammer Drilling	194 kW	Get a Quote

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Main Components

Diesel engine
Track chassis
Rotary head
DTH hammer
Drill string
Dust collector
Operator cabin
Hydraulic system

Working Principle

The Kaishan KG420B operates on the down-the-hole (DTH) drilling principle, where a pneumatic hammer is positioned directly behind the drill bit. High-pressure air is delivered through the drill string to the hammer, driving the piston to strike the bit with high frequency. The rotation unit turns the drill string, allowing the bit to crush rock efficiently. Simultaneously, the air flushes cuttings out of the hole through the annular space. This method ensures fast penetration in hard rock with minimal deviation. The rig's hydraulic system controls feed force and rotation speed, optimizing drilling parameters for different formations. The dust suppression system captures airborne particles, maintaining a safe and clean worksite. The track-mounted chassis provides stability and mobility, while the diesel engine powers all systems, making the KG420B a self-contained and highly efficient drilling solution.

Detailed Features

▸High drilling efficiency in hard rock
▸Excellent mobility on rough terrain
▸Low fuel consumption
▸Advanced dust suppression
▸Ergonomic operator controls
▸Optional automatic rod changer
▸Robust and durable construction
▸Easy maintenance access

Packaging & Shipping

The Kaishan KG420B is shipped in a standard 40-foot container or flat rack, depending on configuration. The rig is securely fastened with heavy-duty straps and protected with anti-corrosion wrap. Delivery time is typically 30-45 days after order confirmation. Port of departure: Shanghai or Ningbo, China. Custom packaging and shipping arrangements are available upon request.

After-Sales Service

Kaishan provides a comprehensive 12-month warranty on the KG420B, covering major components. Our 24-hour technical support hotline ensures prompt assistance. We offer on-site training for operators and maintenance personnel. A global network of spare parts warehouses guarantees quick availability of components. Regular maintenance kits and service contracts are available to maximize uptime and extend equipment life.

Frequently Asked Questions

What hole diameter and drilling depth does the KG420B cover?+

The KG420B drills hole diameters from 90-130 mm to a maximum drilling depth of 25 m. It uses the down-the-hole (DTH) drilling method. This range covers blast hole and water well work in hard rock.

What engine powers the KG420B?+

The KG420B is powered by a 58 kW diesel engine. The diesel engine supports operation in remote areas. The rig weighs 4,150 / 4,350 kg.

What are the dimensions of the KG420B?+

The KG420B measures 7,500 × 2,300 × 3,000 mm (L×W×H). It is a track-mounted chassis built for mobility on rough terrain. The 4,150 / 4,350 kg weight applies to the standard configuration.

Where can the KG420B be used?+

The KG420B is applied in open-pit mining, quarrying, water well drilling and construction foundation work. Its track-mounted chassis gives mobility on rough terrain. The 25 m depth and 90-130 mm hole diameter suit these applications.

What drilling tools does the KG420B use?+

The KG420B uses a DTH hammer and a high-torque rotary head for penetration in hard rock. An automatic rod changer is optional for increased productivity. The DTH method is matched to the 90-130 mm hole diameter range.

How is the KG420B shipped?+

The KG420B ships in a standard 40-foot container or flat rack, depending on configuration. It is fastened with heavy-duty straps and protected with anti-corrosion wrap. Delivery time is typically 30-45 days after order confirmation, with departure from Shanghai or Ningbo, China.

What warranty and support come with the KG420B?+

The KG420B carries a 12-month warranty covering major components. A 24-hour technical support hotline and on-site operator training are provided. A global network of spare parts warehouses supports component availability.