Home>Products> Stone Quarry Machine > Quarry Drilling Machine

DTH Drilling Machine Specification

Understanding the specifications of a DTH (Down‑The‑Hole) drilling machine is essential for choosing the right rig for your project.

Send Inquiry

Description

At our company, we are proud to offer a wide variety of DTH drilling machines for the stone mining industry. Our machines are designed to be efficient, reliable, and easy to use, making them the perfect choice for any mining operation.

We understand the importance of using high-quality equipment in the mining industry, which is why we only supply machines that have been tested and proven to provide excellent results. Our range of DTH drilling machines comes in different specifications to suit various mining needs.

Whether you need a smaller machine for a smaller mining operation, or a larger machine for bigger projects, we have the perfect solution for you. Our machines are designed to be versatile and adaptable, meaning they can handle a range of drilling applications.

We are committed to providing our customers with the best possible service, which is why we always go above and beyond to deliver products that exceed their expectations. Our team is available to answer any questions you may have and will work with you to find the best DTH drilling machine for your specific needs.

So if you're looking for high-quality, reliable and efficient DTH drilling machines for your stone mining operation, look no further than our company. We pride ourselves on delivering excellent products and outstanding customer service, so contact us today to find out more about our range of machines and how we can help your business.

Technical Data

Model	Pneumatic	Pneumatic & Electric	Pneumatic &Hydraulic
Dimeter of drill hole	Φ90-Φ100	Φ90-Φ100	Φ90-Φ165
Air consumption	≥12M³	≥7M³	≥7M³
Air pressure during working	0.5-0.7Mpa	0.5-0.7Mpa	0.5-0.7Mpa
Max.depth of drill hole	30m	30m	30m
Single feeding distance	1.2m	1.2m	1.5m
Speed of drilling	5-10m/h	5-10m/h	6-8m/h

DTH Drilling Machine Specifications – Heavy‑Duty Rock Drilling Equipment

Understanding the specifications of a DTH (Down‑The‑Hole) drilling machine is essential for choosing the right rig for your project. These machines are engineered to provide efficient rock penetration, deep hole drilling, and stable performance in demanding applications such as quarrying, well drilling, blasting preparation, mining exploration, and foundation piling.

Below is a comprehensive and SEO‑friendly breakdown of the key technical parameters, performance capabilities, and configuration options that matter most when selecting or comparing DTH drilling machines.

product-1-1

1. Drilling Diameter (Hole Size Range)

The drilling diameter specifies the minimum and maximum hole sizes the DTH rig can create. This range determines the suitability for different applications:

Hole Diameter	Application
35–65 mm	Anchor holes, soil nails, rock bolts
65–115 mm	Blast holes in quarries
115–150 mm	Large blast hole patterns, well drilling
150 mm+	Specialized deep drilling and water/geo wells

2. Drilling Depth Capacity

The effective drilling depth shows how far the machine can drill in a single operation. Depth capacity depends on the drilling rig platform, drilling rods, and power system.

Typical depth capabilities include:

Up to 30 m (100 ft) - Light to medium DTH rigs

30–100 m (100–330 ft) - Standard quarry and mining rigs

100 m+ (330 ft+) - Deep rock drilling and water/geo wells

This specification is critical when planning deep hole drilling, water well construction, or rock anchoring projects.

3. Power Source & Drive Type

DTH rigs can be powered in multiple ways depending on site infrastructure and project size:

Pneumatic (Compressed Air)

Common for quarry and open rock environments.

Uses air compressors to drive the hammer and clear cuttings.

Stable, robust performance with effective flushing.

Hydraulic Drive

Offers precise drilling control and higher efficiency.

Ideal for crawler‑mounted rigs and larger drilling diameters.

Excellent torque and lower vibration.

Electric & Diesel Options

Portable and onsite drilling rigs often use diesel engines.

Electric drives are useful when constant power supply is available.

4. Down‑The‑Hole Hammer Specifications

The hammer is the core cutting mechanism at the bottom of the hole.

Feature	Typical Range
Hammer Size	3″ – 8″+
Impact Frequency	400 – 1800 blows/min
Impact Energy	30 – 260 J+
Valve Type	Positive, non‑positive

Higher impact energy and frequency help drill harder rock formations like granite or basalt with improved penetration rates.

5. Drill Rod & Coupling Specifications

Drill rods transmit power and torque to the hammer. Their length, thread type, and coupling style directly affect drilling performance.

Feature	Options
Rod Diameter	38 mm – 89 mm+
Thread Type	API, round thread, square thread
Coupling Material	Alloy steel, heat‑treated
Rod Lengths	1.5 m – 3 m

Different thread standards match equipment variations and ensure secure bit attachment and energy transfer.

6. Rotary Speed & Torque (For Hybrid Drills)

Some DTH rigs combine rotary capability with down‑the‑hole hammers to improve hole straightness and improve drilling in layered or mixed strata.

Parameter	Range
Rotary Speed	50 – 200 rpm+
Torque Output	500 – 3000 N·m+

This parameter is more relevant for rock hole drillers, rotary percussion rigs, and multi‑purpose drilling machines.

7. Flushing & Cooling Performance

Efficient flushing is key for chip removal, heat reduction, and consistent drilling rate. DTH rigs typically use:

Air flushing – common in quarry and hard rock

Water flushing – used when air is limited or dust must be controlled

Mixed or pressured flushing for deeper penetration rigs

Good flushing improves hammer life and reduces overall operating cost.

8. Rig Mobility & Mounting Options

DTH drilling machines come in various platforms, including:

Rig Type	Application
Portable Stand‑Alone Units	Small projects, confined spaces
Crawler Mounted Rigs	Quarry and mining environments
Truck Mounted Rigs	Large site mobility and deep drilling
Stationary Frames	Workshop or confined drilling

Each configuration affects setup time, site adaptability, and drilling depth capabilities.

9. Safety & Control Features

Modern DTH drilling rigs may include:

Remote operation systems

Automated tension control

Drilling parameter monitoring

Safety guards and vibration absorption systems

These features enhance operator safety, drilling consistency, and machine longevity.

10. Maintenance & Wear Part Considerations

Consistent performance relies on:

DTH hammer wear parts (seals, valves)

Drill bits and button bits

Drill rod coupling health

Lubrication and flushing system upkeep

Planning a maintenance schedule and spare parts inventory helps reduce downtime and extend machine service life.

How to Use These Specifications to Choose the Right DTH Rig

✔ Identify the rock type and hardness – This guides hammer size, impact energy, and bit selection.
✔ Determine hole diameter and depth requirements – Match drilling specs to project needs.
✔ Select the suitable power type – Pneumatic vs hydraulic vs diesel depends on site logistics.
✔ Consider mobility – Portable vs crawler vs truck mounted rigs.
✔ Plan for consumable and service support – Ensure the supplier offers parts and technical guidance.

Using the right specification matrix will help you optimize productivity, reduce costs, and improve drilling accuracy throughout the life of your drilling project.

Example Summary Table (Quick Reference)

Category	Specification Range
Hole Diameter	35 mm – 150 mm+
Drilling Depth	Up to 100 m+
Power Source	Pneumatic / Hydraulic / Diesel / Electric
Hammer Size	3″ – 8″+
Drill Rod Types	R22, R28, R32, T38, T45, T51
Flushing System	Air, Water, Mixed
Mobility Options	Portable, Crawler, Truck Mounted