A DTH drilling machine is equipment used to drill holes in rock and other suitable ground formations. DTH stands for “Down The Hole,” referring to the impact hammer that operates near the drill bit at the bottom of the hole. YG’s portable models are commonly described as lightweight or tripod-type drilling machines. They are designed for drilling tasks in areas such as quarries, roads, slopes, water conservancy projects, and other rock engineering sites.
YG’s portable DTH drilling machines are divided into two main power types:
- Electric and compressed-air type: An electric motor drives the drill rod’s rotation, while compressed air powers the impact hammer.
- Fully pneumatic type: Compressed air supplies the power for the machine’s operation, making it an option for sites where electrical power is unavailable, provided a suitable air supply is available.
For more details, welcome to contact YG Machinery anytime.
Get 12-Month Warranty & 24/7 Technical Support – Learn More
Portable DTH Drilling Rig Parameters
| Model | YGD70/YGD80 | YGD100 | YGQ100 | YGB120 |
| Drilling Dia. | 90-120mm | 90-130mm | 90-130mm | 90-130mm |
| Apply rock | ≥20 | ≥20 | ≥20 | ≥20 |
| Drilling depth | 15m | ≥25m | ≥25m | ≥30m-40m |
| Drilling rotate speed | 110r/min | 110r/min | 110r/min | 110r/min |
| Working air pressure | 0.5-0.7Mpa | 0.5-1.0Mpa | 0.5-1.0Mpa | 0.5-1.0Mpa |
| Air consumption | 4m³/min | 6m³/min | 12m³/min | 10m³/min |
| Cylinder Dia. | 90mm | 140mm | 140mm | 140mm |
| Propulsion stroke | 1070mm | 1070mm | 1070mm | 1070mm |
| Max propelled force | 3600N/8000N | 9600N | 9600N | 9600N |
| Electric motor power | 3KW/4KW | 4KW | / | 4KW/5.5KW |
| Electric motor voltage | 380V | 380V | / | 380V |
| Rated speed | 1440r/min | 1440r/min | 3200r/min | 1440r/min |
| Drilling rod OD | 42mm | 50-60mm | 50-60mm | 60mm |
| Drilling rod length | 1025mm | 1025mm | 1025mm | 1025mm |
| Dimension | 1740*260*420 | 2280*440*550 | 2230*380*550 | 2230*380*550 |
| Weight | 280/320KG | 470KG | 450KG | 460/480KG |
Get 12-Month Warranty & 24/7 Technical Support – Learn More
How Does a DTH Drilling Machine Work?
The working principle of a portable DTH drilling machine combines drill-rod rotation, impact force, and compressed air. These actions work together to break rock and remove the resulting fragments from the hole.
Get 12-Month Warranty & 24/7 Technical Support – Learn More
What Are the Main Features of YG DTH Drilling Machines?
- Compact structure and convenient transportation: Portable DTH drilling machines have a detachable structure, making it easier to transport the machine components to locations where access is limited. This is especially useful for slope work, road construction, and sites where a large crawler rig may be difficult to position.
- Simple operation: The machine uses a practical combination of drilling tools, feed components, and operating controls. Operators still need appropriate training, but the relatively compact design can make the equipment convenient for suitable small and medium-sized drilling projects.
- Efficient rock drilling: The down-the-hole hammer delivers repeated impacts near the drill bit. Combined with drill-rod rotation and compressed-air removal of cuttings, this design supports rock drilling in suitable formations. Actual penetration speed varies according to rock hardness, hole diameter, drilling depth, air supply, and equipment configuration. It should not be treated as a fixed value for every site.
- Flexible power options: The YGD series uses an electric motor with compressed air for drilling, while the YGQ series uses pneumatic power. This gives buyers options according to whether electricity is available at the job site.
- Different models for different drilling needs: The models differ in motor power, drill-rod diameter, hammer and bit configuration, and intended drilling depth. Choosing the right model can help you avoid selecting equipment that is too small for the job or unnecessarily heavy for your site.
Get 12-Month Warranty & 24/7 Technical Support – Learn More
Which YG DTH Drilling Machine Model Is Right for You?
| Model | Standard configuration described in the source | Drilling depth guidance | Main advantage |
|---|---|---|---|
| YGD70 | 3 kW electric motor, 42 mm drill rods, 70 mm hammer, 76 mm bit | Up to 15 m | Compact and economical for relatively shallow drilling and difficult-to-access sites |
| YGQ70 | Pneumatic motor configuration; the source describes a Y3 pneumatic motor | Can be considered where electrical power is unavailable, but it is less commonly promoted | |
| YGD100 | 4 kW electric motor, 50 mm drill rods, 90 mm hammer, 90 mm bit | Up to 25 m | A practical main model for slope protection, quarries, water conservancy, and road or railway construction |
| YGQ100 | Pneumatic motor, 50 mm drill rods, 90 mm hammer, 90 mm bit | Suitable for sites without electricity when an adequate compressed-air supply is available | |
| YGB120-5.5 | 5.5 kW cycloidal motor, 60 mm drill rods, 90 mm hammer, 90 mm bit | Up to 40 m | Higher torque and stronger drilling capability for deeper-hole work; heavier and more complex to maintain |
Get 12-Month Warranty & 24/7 Technical Support – Learn More
Where Can a DTH Drilling Machine Be Used? 5 Applications
- Slope protection: Drilling holes for slope stabilization, rock bolts, and anchor cables can help support engineering work on road cuts and rocky hillsides.
- Quarrying and small mining projects: DTH equipment can drill blast holes in suitable rock formations for controlled blasting and rock extraction.
- Road and railway construction: When a route passes through rocky terrain, drilling equipment can prepare holes for rock excavation and other construction operations. Portable models can be useful where large equipment is difficult to transport or position.
- Water conservancy and earthwork: Suitable DTH drilling machines can support rock drilling for water-related construction and earthwork projects.
- Underground and restricted-access work: Certain portable or specially configured models may suit underground mining and other restricted-access environments. The YGQ100 is specifically designed for underground mining, while the YGQ100 column-type version is described as designed for tunnel and underground work.
Get 12-Month Warranty & 24/7 Technical Support – Learn More
What Is the Difference Between a Portable DTH Drilling Machine and a Crawler DTH Drilling Machine?
A portable DTH drilling machine and a crawler DTH drilling machine use similar down-the-hole drilling principles, but they are designed for different job-site needs.
| Comparison | Portable DTH drilling machine | Crawler DTH drilling machine |
|---|---|---|
| Typical models | YGD70, YGQ70, YGD100, YGQ100, YGB120-5.5 | YGS100A, YGS153, YGS180, YGS300, and YGS350 |
| Machine structure | Compact, detachable, and designed for convenient transport | Mounted on a crawler chassis for self-propelled movement |
| Relocation | May require disassembly or manual/other equipment assistance, depending on the site and configuration | Can travel between suitable drilling locations using its crawler tracks |
| Power configuration | Electric motor plus compressed air, or fully pneumatic, depending on the model | Depends on model: you can choose diesel-powered crawler models and split-type or integrated compressor arrangements |
| Typical work scale | Small and medium-sized projects, shallow to moderate-depth drilling, and difficult-access areas | Open-pit mining, quarrying, and larger drilling operations where frequent relocation is required |
| Depth and hole size | Vary by model; up to 15 m for YGD70, 25 m for YGD100, and 40 m for YGB120-5.5 | 83–165 mm across its featured models |
| Main advantage | Convenient transport and flexible setup in restricted spaces | Better mobility between drilling points without repeatedly dismantling the drilling assembly |
| Important consideration | Check setup time, transport access, power supply, and drilling depth | Check overall dimensions, machine weight, travel conditions, compressor arrangement, and required hole specifications |
Which type should you choose?
Choose a portable DTH drilling machine if your project needs a compact, detachable machine that can be carried to difficult-access locations, and the required drilling depth and hole size fit the available model.
Choose a crawler DTH drilling machine if you work mainly in open-pit quarries or mines and need to move the rig between drilling points regularly. Its crawler chassis can simplify relocation on suitable terrain.
Neither type is automatically better for every project. The right choice depends on the drilling depth, hole diameter, geology, available power, site access, and daily workload.
Factory Direct DTH Drilling Machine-Choose YG Machinery Today
YG provides drilling equipment options for different rock drilling and construction requirements. Whether you need a compact portable DTH drilling machine for slope protection or a crawler DTH drilling machine for open-pit quarrying, start by matching the equipment to your actual drilling conditions.
Contact YG today to discuss your project and request a quotation. Tell us whether you are drilling soil or rock, your required hole diameter and depth, whether electricity is available, and so on.
YG can help you compare suitable models, review the required configuration, and identify the equipment that fits your work.
