Separated Type Down-the-hole Drill

Separated type down-the-hole drill(YRSD-612) is a versatile machine featuring simple operation, high efficiency, low energy consumption, and high reliability. Equipped with a Yuchai 78kW engine, The engine brand can also be customized according to your needs. Separated type down-the-hole drill can drill holes from 90 to 120 mm in diameter. It offers flexibility and is particularly well-suited for small working surfaces. It is widely used in mining, defense, transportation, water conservancy, and rockwork projects.

I. Product Overview

The split-type down-the-hole hammer drill is a versatile rock drilling solution designed for projects with extremely high requirements for mobility and cost-effectiveness. Unlike integrated drills, the split design allows the drill unit to move independently on narrow mountain roads and steep slopes, while the air compressor remains on flat ground-a key advantage in projects such as quarry bench drilling, road construction, and slope reinforcement.

The drill has a borehole diameter range of 90 to 120 mm and a maximum drilling depth of 30 meters, making it ideal for medium-depth blasting holes, anchor bolts, water well drilling, and geothermal drilling. When used with a high-pressure air compressor (e.g., models 21/25 or 23/28), it achieves excellent penetration rates in medium to hard rock formations.

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II. Detailed Technical Specifications

It is recommended to clearly present the specifications in a table for customers to quickly assess compatibility.

Specifications
Aperture range 90 – 120 mm (3.5" – 4.7") Maximum. Drilling Depth: 30 meters (98 feet) – Single drill run or 2-3 drill pipes

Drill Pipe Diameter: 76 mm / 89 mm (outer diameter)

Drill Pipe Length: 2 meters / 3 meters (field interchangeable)

Feed Stroke: 2000 – 3000 mm

Feed Force (Pull-up/Pull-down): 15 – 20 kN / 25 – 35 kN

Spindle Speed: 0 – 100 rpm (variable, hydraulic)

Rotary Torque: 2000 – 3500 N·m

Down-the-Hole Hammer Compatibility: 3-inch – 4-inch down-the-hole hammers (e.g., DHD 3.5, DHD 340, COP 34)

Air Consumption: 12 – 25 cubic meters/minute @ 10 – 20 bar (depending on hammer body)

Hydraulic System Pressure: 18 – 20 Megapascal

Engine Power (Diesel): 55 – 85 kW (75 – 115 hp)

Drive Type: Rubber Tracks/Pneumatic Tires (Customer Optional)

Weight: 3500 – 5000 kg (Depending on Configuration)

Transport Dimensions: 5500 × 2000 × 2300 mm (Approx.)

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III. Core Advantages (Why Choose This Split-Type Drill Rig?)

1. Superior Terrain Adaptability – The Advantage of a Split-Type Drill Rig

The separate design of the drill rig and air compressor allows this rig to access steep, narrow, or unstable work sites where integrated drill rigs cannot operate. The rig's compact and lightweight structure makes it easy to transport by flatbed truck or even towed by vehicle. This makes it ideal for mountain road construction, high-slope anchoring, and small quarry operations.

2. Suitable for Medium Depth Drilling (90-120 mm)

This drill is designed for drilling holes in the 90-120 mm diameter range, achieving optimal energy efficiency. The hydraulic rotary and feed system is precisely matched to 3-inch to 4-inch down-the-hole hammers, ensuring maximum impact energy transfer while avoiding excessive air or fuel consumption-ideal for 30-meter blasting holes and anchor bolt operations.

3. Robust and Easy-to-Maintain Construction

• Heavy-duty mast: The welded steel mast features a sliding wear plate, ensuring precise alignment and long service life.

• Hydraulic components: Utilizing hydraulic components from reputable brands (Danfoss, Eaton, or equivalent) ensures reliability and easy component replacement.

• Centralized lubrication: An automatic lubrication system at key pivot points reduces manual maintenance and extends component life.

4. High-Efficiency Dust Removal

Equipped with a large-capacity dust collector (cyclone separator + filter), it captures up to 95% of drill cuttings, ensuring compliance with environmental regulations and providing a safer working environment for operators. A dry dust removal system is standard; a wet blasting system is optional.

5. Operator Comfort and Safety

• Remote Control/Pilot Valve: All drilling functions (feed, rotation, hammer start) can be controlled from a comfortable control panel, keeping operators away from moving parts and falling objects.

• Rollover Protection (ROPS): Optional ROPS-certified cab or canopy for enhanced safety.

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IV. Application Scenarios (Main Applications)

90-120mm split-type drilling rigs are widely used in multiple industries:

Application Details

Quarantine Blasting: Drilling blasting holes in limestone, granite, and aggregate quarries

Small and Medium-Sized Mines: Bench drilling in open-pit mines (gold, copper, coal)

Slope Stabilization: Drilling anchor holes for highway and railway slopes

Foundation Engineering: Drilling micropiles, rock plug piles, and foundation anchor holes

Water Well Drilling: Shallow to mid-level water well drilling in hard rock areas

Geothermal Exploration: Exploration drilling and geothermal loop installation

Advantages of Separated type down-the-hole drill:

Control Platform

Propulsion beam

engine

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