Are you searching for a reliable hydraulic rotary drilling rig? YG Machinery designs and builds advanced rotary rig machines for foundation drilling, piling, and civil engineering projects. Our rigs deliver high torque, fast penetration, and stable operation across many soil conditions. In this article, you will learn about key specifications, the machine structure, how a rotary rig works, and where a small rotary drilling rig fits best. You will also find helpful details on rotary drilling rig price options and why YG makes a strong partner for your business.
Hydraulic Rotary Drilling Rig Parameters
The table below shows the main specifications for YG’s hydraulic rotary drilling rig series. These numbers help you match the right model to your pile diameter and depth requirements. All values come from factory testing under standard working conditions.
| Dimensions (mm) | 7900*2260*3100 |
| Vehicle mass (kg) | 8000 |
| Wheelbase (mm) | 3150 |
| Wheelbase (mm) | Front 1400 After 1060 |
| Drilling depth (m) | 13 |
| Drilling diameter (mm) | 600-1600 |
| Rotation angle | 180 degree |
| Hydraulic system working pressure (MPa) | 50 |
| Gear pump model | CBJT2080 |
| Hydraulic system working pressure (Mpa) | 20-25 |
| Hydraulic system displacement (ml/r) | 80 |
| engine model | 4108 |
| Engine power (kW) | 88 |
Each parameter directly affects drilling performance. For example, higher torque lets the rig cut through dense clay and weathered rock more smoothly. YG can also adjust engine power and mast height to fit your job site. For a detailed quotation and the latest price based on your chosen model, just contact our sales team.
Rotary Rig Machine Structure
A rotary rig machine uses a modular design that simplifies transport and maintenance. You can understand the main structural parts through these three points.
- The crawler undercarriage provides mobility and stability.This component moves the entire unit across soft or uneven ground. Wide tracks spread the machine weight evenly and prevent sinking. Once the rig reaches the pile position, the undercarriage locks firmly in place. This base keeps the machine steady during high-torque drilling.
- The mast and Kelly bar guide the drilling tools vertically.The mast stands upright and acts as a strong backbone for the rig. Inside the mast, the Kelly bar connects the rotary drive to the drill bucket. This bar telescopes down smoothly as the hole gets deeper. Together, they ensure straight hole alignment and accurate pile placement.
- The hydraulic system and drill bucket perform the cutting work.The hydraulic system powers rotation, crowd force, and winch lifting with precise control. The drill bucket cuts the soil, collects spoil, and then discharges it to the side. An enclosed cabin gives the operator clear visibility and easy control of all these functions. YG reinforces all structural welds and uses wear-resistant steel in high-stress areas. As a result, the whole machine stays durable even after long working hours.
How a Hydraulic Rotary Drilling Rig Works？
The working process follows a clear sequence that repeats until the pile hole is complete. Here are the six main steps.
- Position the rig exactly over the pile mark.The operator moves the hydraulic rotary drilling rig to the designated spot. Then the machine levels itself using the crawler undercarriage and outriggers. Correct positioning at this stage ensures vertical accuracy later.
- Lower the Kelly bar and start the drilling cycle.The rig lowers the Kelly bar with the attached drill bucket. The rotary drive spins the bucket while the hydraulic system applies steady downward pressure. This action cuts into the ground and fills the bucket with soil quickly.
- Lift the bucket and discharge the spoil.Once the bucket is full, the operator lifts the Kelly bar and swings the bucket to the side. The bottom of the bucket opens and the spoil drops onto the ground. Removing spoil in batches keeps the hole clean and ready for deeper cutting.
- Install temporary casing when needed.For unstable or sandy ground, the rig can install a temporary steel casing. This casing prevents the hole wall from collapsing inward. It also protects the drilled hole until concrete pouring begins.
- Repeat the cutting and unloading cycle until reaching the design depth.The bucket returns to the hole and repeats the same cutting and lifting actions. The machine keeps drilling deeper cycle by cycle until it reaches the required pile depth.
- Clean the hole and complete the concreting work.After the hole reaches the final depth, the crew cleans the bottom carefully. Then they place the reinforcement cage into the hole and pour concrete. This continuous process delivers high vertical accuracy and speeds up foundation construction.
Small Rotary Drilling Rig Projects
A small rotary drilling rig offers a practical answer when space is tight and budgets are limited. These compact machines fit into four main project types.
- Urban foundation piles in narrow or restricted job sites.City construction often means working between existing buildings or along tight streets. A compact unit can enter these confined spaces easily where large rigs cannot fit. It drills foundation piles for small commercial buildings, residential towers, and infill projects without blocking traffic.
- Bridge abutments and retaining wall construction.Small bridges and retaining walls need stable pile foundations. These projects often sit on narrow roads or hillside paths. A compact machine drills the required piles while using minimal working space. Transport and setup cost also stay low, which helps keep small infrastructure budgets under control.
- Slope stabilization and landslide protection work.Hillside projects need drilling rigs that can reach steep areas safely. This equipment moves up narrow access tracks and positions itself on uneven ground. It then drills anchor piles or soil nails that strengthen the slope against erosion and landslides.
- Solar farm piling and other renewable energy foundations.Solar panel fields need hundreds of foundation piles installed quickly. The machine drills these holes fast and moves from point to point without damaging the land. YG also supplies a dedicated solar pile driver for such projects, which you can explore in our product range.
Because the overall weight is lower, transport and fuel consumption also cost much less. Despite the smaller dimensions, these rigs deliver reliable torque and enough depth for most light-to-medium pile work. Contractors who move often between small jobs will find this combination of performance and low cost very effective.
Rotary Drilling Rig Price at YG Machinery
You deserve a transparent quotation without hidden extra charges. YG Machinery offers factory-direct quotes that include standard configuration, basic tooling, and worldwide shipping support. Every rig passes a strict inspection before delivery. Our service team stays with you through installation, operator training, and spare parts supply. In addition, YG provides custom paint, special chassis options, and technical upgrades upon request. This means you get a machine built for your project, not just a stock model.
Besides hydraulic rotary drilling rigs, YG Machinery produces a full range of drilling and piling equipment. Our product line covers many job site needs:
- Small water well drilling rig for domestic and agricultural water projects
- DTH hammer drilling rig for hard rock drilling and deep water wells
- Hydraulic core drilling rig for mineral exploration and geological surveys
- Horizontal directional drilling rig for trenchless pipe installation
- Solar pile driver for photovoltaic farm foundation work
- Core drilling rig for solid rock sampling and investigation
- Reverse circulation drilling rig for deep and large-diameter holes
By choosing YG, you gain access to a complete drilling solution rather than just a single machine supplier. Our engineers understand how different rigs work together on complex projects. This knowledge helps you pick the right combination and avoid costly mismatches.
Contact YG Machinery today to discuss your pile diameter, depth, and ground conditions. Request a quotation for a hydraulic rotary drilling rig or any other machine from our catalog. Tell us your project requirements, and we will return a competitive offer quickly. Let us help you move your next project forward with reliable equipment and professional support.
