When I look at a rock drilling project, I do not judge a drilling rig only by its engine power or maximum drilling depth. What matters to me is how the machine performs when the rock changes, how quickly it can move from one hole to the next, how stable the drilling system remains during long working hours, and how much each drilled meter actually costs.

The SWDE138B Integrated DTH Drill Rig is designed with these practical requirements in mind. It is a new-generation surface drilling machine developed for high-productivity drilling and blasting work. The machine is intended to combine efficient drilling, stable operation, lower construction energy consumption, and flexible rock-drilling capability in one integrated platform.

According to the product information, the SWDE138B supports a 138–180 mm drilling diameter and a maximum drilling depth of 36 m with automatic pick-up and unloading rod functions. It is designed to work across different rock conditions by using cutting methods in softer rock and DTH drilling in harder rock.

That combination is important to me because a real construction site rarely has perfectly uniform geology. One section may be soft and weathered, while another section only a few meters away may contain hard rock. A useful drilling machine needs to deal with these changes without making the whole operation complicated.

1. What Is the SWDE138B Integrated DTH Drill Rig?

The SWDE138B is an integrated DTH drill rig designed for surface rock drilling, blasting preparation, and other demanding drilling applications. DTH means down-the-hole. In this drilling method, the hammer is placed close to the drill bit at the bottom of the borehole.

Compressed air travels through the drill rods and powers the pneumatic hammer. The hammer repeatedly strikes the drill bit while the rotary system turns the drill string. At the same time, air flushing helps remove broken rock from the hole.

This is one reason DTH drilling is widely used for hard-rock applications. Liebherr describes DTH drilling as a method in which the hammer is located at the lower end of the drill rod and is mainly used for hard and very hard rock.

I see the integrated design as equally important. Instead of treating the drilling mechanism, carrier, hydraulic system, air system, feed system, rotary head, and controls as unrelated equipment, an integrated rig brings them together as one working machine.

Source: SWDE138B product information supplied for this page. Final machine specifications should be confirmed according to the actual configuration and order.

2. How I Use DTH Drilling to Break Hard Rock

I usually explain the DTH process in a simple way. A drill bit needs to rotate and hit the rock again and again. Rotation allows the bit to attack a new part of the rock, while impact breaks the rock into smaller pieces.

In a DTH system, the hammer is positioned directly behind the bit. Compressed air enters the hammer through the drill string. Inside the hammer, a piston moves rapidly and strikes the bit. The rotary head keeps the drill string turning, and the feed system pushes the drill assembly forward.

Once the rock is broken, the compressed air also helps carry the cuttings back up the borehole. This flushing process is important. If too much broken material remains around the bit, drilling efficiency can fall and the hole can become difficult to clean.

USGS technical material describes air-hammer drilling as a method in which a pneumatic hammer rapidly strikes the formation while the bit rotates, with air carrying cuttings back toward the surface.

In practical operation, I divide the drilling cycle into four basic steps:

• Positioning: I move the crawler-mounted rig to the planned drilling point.

• Alignment: I set the drilling structure to the required hole direction and angle.

• Drilling: The rotary head turns the drill string while the DTH hammer breaks the rock.

• Flushing: Compressed air removes the crushed rock from the borehole.

The key is balance. More feed pressure does not always mean faster drilling. If the feed force is too high, drill tools can wear faster. If the air supply is not suitable, cuttings may not leave the hole efficiently. If rotation is not matched to the rock and bit, drilling performance can suffer.

For this reason, I always consider drilling as a complete system rather than simply a matter of increasing machine power.

3. A Flexible Approach to Soft and Hard Rock

One feature I consider particularly useful is the ability to use different drilling approaches for different ground conditions. Rock formations can change quickly, especially in mining, quarrying, and road construction.

In softer rock, rotary cutting can provide an efficient way to remove material. When the formation becomes harder, DTH percussion can provide the repeated impact needed to break the rock.

This does not mean that every rock type will produce the same drilling speed. Geological conditions still control the result. Rock strength, abrasiveness, fractures, moisture, hole depth, bit design, air supply, feed force, and operator settings all have an effect.

Source: comparison based on general DTH and rotary drilling principles. Actual drilling performance depends on site geology, tools, machine configuration, and operating conditions.

For a contractor, this flexibility can be useful because it reduces the need to select equipment based on only one type of rock. Instead, the drilling method can be matched to the actual ground encountered during the project.

4. Main Features of the SWDE138B

138–180 mm Drilling Diameter

The specified 138–180 mm drilling diameter gives the SWDE138B a practical range for surface rock drilling and blasting preparation. Hole diameter is not simply a machine setting. It needs to match the blast design, rock conditions, explosive loading plan, and required fragmentation.

For this reason, I would select the drill bit and drilling configuration according to the actual project rather than automatically using the largest available diameter.

Maximum Drilling Depth of 36 m

The machine is designed for a maximum drilling depth of 36 m with automatic rod pick-up and unloading. This gives the drilling rig useful depth capability for projects where shallow holes are not enough.

At the same time, I would not treat 36 m as a guaranteed production depth for every geological condition. Maximum depth and practical production depth are two different things. Rock type, hole diameter, rod configuration, air conditions, drilling angle, and tooling all affect the actual result.

Automatic Rod Handling

Deep drilling requires several drill rods. Handling these rods manually can take time and increase operator workload. Automatic pick-up and unloading functions can make the drilling cycle easier to manage, particularly when the machine is drilling deeper holes throughout the day.

Integrated Drilling Structure

The integrated layout brings the drilling equipment and carrier into one mobile platform. This makes it easier to move the machine between drilling points and organize the work area. It also gives the operator one main machine to control instead of coordinating several separate pieces of equipment.

High-Productivity Design

The product is developed around high drilling efficiency. I define productivity in a practical way: not just how fast the bit penetrates, but how many useful meters the machine completes during an actual working shift.

Moving between holes, positioning, rod handling, maintenance, tool changes, and waiting time all influence the final production number. A machine that keeps these steps organized can deliver better real-world productivity even if its theoretical penetration speed is not the highest number in a catalog.

Lower Construction Energy Consumption

The SWDE138B product concept also focuses on energy saving and lower construction energy consumption. I prefer to describe this carefully because real energy use depends on the jobsite. Rock hardness, drilling depth, air demand, idle time, machine settings, and operator behavior all influence fuel or energy consumption.

5. Where I Would Use the SWDE138B

I would consider the SWDE138B Integrated DTH Drill Rig for projects where drilling productivity has a direct effect on the overall construction schedule and cost.

Mining operations are a natural application. In open-pit mining, blast-hole drilling is normally completed before explosives are loaded and blasting takes place. The drilling process therefore affects the timing of several later operations.

Quarrying is another important use. Quarry benches require holes with planned diameter, depth, angle, spacing, and position. Stable drilling helps create a more predictable blasting pattern.

Road construction can involve drilling through hard rock before excavation or controlled blasting. Depending on the road alignment and rock face, vertical or inclined holes may be required.

Civil construction and site preparation may also require surface rock drilling when the ground cannot be removed efficiently by normal excavation equipment.

Source: application categories are based on the supplied SWDE138B product description and common surface DTH drilling applications. Final suitability should be checked against the project geology and drilling plan.

6. DTH Drilling Performance: What I Actually Watch

When I operate or evaluate a DTH drilling system, I do not look only at penetration speed. I also watch the quality of the hole and the stability of the drilling cycle.

The first factor is air supply. DTH hammers depend on compressed air for percussion and flushing. If the air supply is not properly matched to the hammer and hole conditions, drilling efficiency can fall.

The second factor is feed pressure. The drill bit needs enough force to stay in contact with the rock, but excessive force can increase wear and create unnecessary stress on the drilling system.

The third factor is rotation speed. Rotation must be matched to the bit and rock. Too little rotation can reduce cutting efficiency, while excessive rotation can increase tool wear.

The fourth factor is flushing. The hole needs to stay reasonably clean so the bit can continue working against fresh rock rather than repeatedly crushing loose material.

The fifth factor is drill-tool condition. A worn bit can change drilling performance significantly. A contractor who wants a low cost per meter needs to consider both drilling speed and consumable life.

These points are why I prefer to discuss drilling performance using the complete operating cycle. The target should be consistent meters drilled with controlled wear, stable hole quality, and reasonable energy consumption.

Source: general DTH drilling operating principles. Values and settings should be established according to the final hammer, bit, machine configuration, and geological conditions.

7. How I Approach SWDE138B Manufacturing at HKLOONG

At HKLOONG Heavy Industry Technology (Hefei) Co., Ltd., our work covers equipment R&D, precision manufacturing, quality testing, customized modification, and global distribution. I apply the same complete-machine thinking to drilling equipment.

For an integrated DTH drill rig, the main structure must handle repeated vibration, feed loads, rotary torque, and movement across working areas. That means frame construction, welding quality, dimensional accuracy, and structural inspection all matter.

The drilling system also needs proper matching. The feed mechanism, rotary head, drill rods, hammer, bit, and air system cannot be considered separately. Their performance affects one another throughout the drilling cycle.

I also pay attention to hydraulic control and service access. A drilling rig works in dusty and demanding environments, so technicians need practical access to inspection and maintenance points. Easy maintenance can reduce unnecessary downtime and help keep the machine available for production.

Quality testing should be completed at the machine level. Instead of checking only individual components, I want to verify that the major systems work together correctly. Machine movement, drilling-system functions, hydraulic controls, structural condition, and operator controls all need appropriate inspection before delivery.

For customers working outside China, I also consider transportation, climate, local operating conditions, spare parts, service requirements, and operator training. A machine is only useful when it can continue working after it reaches the jobsite.

8. Why Choose Our SWDE138B Integrated DTH Drill Rig?

I know that a drilling rig is a major investment. The purchase decision can affect drilling costs for years, so I prefer to focus on practical project results rather than make broad claims.

• Integrated equipment development: HKLOONG combines R&D, manufacturing, quality testing, and technical service.

• Useful drilling range: The specified 138–180 mm diameter range covers many medium-to-large surface drilling requirements.

• Deep-hole capability: Up to 36 m maximum drilling depth provides useful flexibility for demanding drilling plans.

• Flexible rock drilling: The product is designed for cutting softer rock and DTH drilling in harder rock.

• Automatic rod handling: Automatic pick-up and unloading can simplify the drilling process when multiple rods are required.

• Project-based support: We can evaluate equipment requirements according to rock type, drilling diameter, depth, working environment, and production target.

• Heavy-duty equipment experience: Our wider product range includes construction and earthmoving equipment designed for demanding working conditions.

I also encourage customers to provide real project information before selecting the machine. The most useful information includes rock type, rock hardness, hole diameter, hole depth, drilling angle, required production per day, climate, altitude, transportation restrictions, and available drilling tools.

That information allows us to discuss the machine based on the actual job instead of relying on a generic catalog recommendation.

SWDE138B Integrated DTH Drill Rig FAQ

What is the SWDE138B Integrated DTH Drill Rig used for?

The SWDE138B is designed for surface rock drilling and blasting-related applications. Typical projects include mining, quarrying, road construction, civil construction, and other work requiring medium-to-large diameter rock holes.

What is the drilling diameter of the SWDE138B?

The specified drilling diameter is 138–180 mm. The final drilling tool should be selected according to the required hole diameter, rock condition, and project design.

How deep can the SWDE138B drill?

The specified maximum drilling depth is 36 m, with automatic pick-up and unloading rod capability. Actual drilling depth depends on the drilling configuration and site conditions.

Why is DTH drilling suitable for hard rock?

DTH drilling places the pneumatic hammer close to the drill bit. The hammer delivers repeated impact directly near the bottom of the hole, making the method well suited to hard and very hard rock.

Can the SWDE138B drill softer rock?

Yes. The product is designed to support cutting in softer rock as well as DTH drilling in hard rock. The correct method should be selected based on the actual formation.

What affects the drilling speed?

Rock hardness, abrasiveness, drilling diameter, bit type, hammer performance, air supply, feed force, rotation speed, hole depth, and operator settings all affect drilling speed. Because geology varies, one fixed penetration rate cannot represent every jobsite.

Is the SWDE138B suitable for quarrying?

Yes. Quarrying is a typical application for surface blast-hole drilling. The 138–180 mm drilling range and maximum 36 m drilling depth provide useful capacity for many quarry drilling requirements, subject to the actual blast design and geological conditions.

How can I reduce the cost per drilled meter?

I would look at the complete drilling cycle rather than penetration speed alone. Proper bit selection, stable air supply, correct feed and rotation settings, regular maintenance, good rod handling, and reduced idle time can all help control the cost per drilled meter.

Can HKLOONG customize the machine configuration?

Configuration can be discussed according to the customer's project requirements. We normally consider hole diameter, drilling depth, geological conditions, drilling angle, working environment, transportation requirements, and expected production before recommending a suitable configuration.

Final Thoughts

For me, the SWDE138B Integrated DTH Drill Rig is about making the complete drilling process more practical. The 138–180 mm drilling range, maximum 36 m drilling depth, automatic rod handling, and combination of cutting and DTH drilling give contractors useful flexibility for surface rock drilling.

The real result, however, always depends on how the machine is matched to the job. Rock strength, drilling diameter, hole depth, bit selection, air supply, feed force, rotation, and operator experience all have a direct effect on production and operating cost.

At HKLOONG Heavy Industry Technology, I take a complete-machine approach to equipment development. From R&D and precision manufacturing to quality testing, customization, and global distribution, our goal is to provide machinery that can work reliably in demanding heavy-duty applications.

If your project involves mining, quarrying, road construction, or rock blasting, I recommend evaluating the SWDE138B according to your actual drilling plan rather than choosing equipment based on one specification alone. When the drilling system is properly matched to the ground, a stable drilling cycle can help improve productivity, control energy consumption, reduce unnecessary wear, and lower the overall cost of construction.