Compact SR125: choose for the project and site conditions
Used SANY SR125 rotary drilling rigs are often considered for urban sites with restricted access and small foundation projects. Efficient operation still depends on the actual configuration, ground and site conditions. Compact dimensions alone do not mean ownership costs will be low.
For a buyer, the first step is to verify the particular SR125's year, Kelly bar and undercarriage configuration. Check the nameplate, Kelly bar, rotary head and counterweight layout to understand the configuration being quoted.
SR125: What Really Sets It Apart: A Compact Working Range
SANY product information can help compare specifications. In the official SR125-V brochure, the Standard Version has a maximum pile diameter of 1,500 mm, a reference depth of 41 m with a custom friction Kelly bar or 31 m with a standard interlocking Kelly bar, and an operating weight of 30.9 t without the Kelly bar. The brochure calculates those depths using a 1,500 mm long bucket. The official SR305R-S page lists a maximum pile diameter of 2,500 mm, maximum pile depth of 100/65 m and operating weight of 105 t. These figures refer to the specified series and configurations, not to any particular used machine. Whether a compact rig is suitable still depends on site access, transport and actual work requirements.
Earlier GLOBMACH SR125 records included stock numbers EB-747861 and EB-E091062CB8. Confirm that the selected record remains valid, and compare the model and images shown on its page with the machine's nameplate, records and current configuration. Also confirm the fitted Kelly bar, measured transport dimensions, evidence of year and operating condition. For constrained urban sites, first ask about gate width, turning area, headroom, assembly space and local axle-load limits. Also compare whether the compact design helps meet these site and transport requirements; if it does not, its price premium may not offer a commercial advantage.
Series reference values cannot replace the used machine's actual configuration
For a used machine, check the fitted Kelly bar and rotary head, then assess depth and diameter against documentation for its year and configuration.
Use manufacturer information for the actual machine and configuration as a reference, then ask the seller for that machine's exact year, serial number and parts list. If the seller cannot provide a clear nameplate and detailed configuration list, treat every claimed depth and diameter as unverified.
Kelly bar configuration affects usable drilling depth
The Kelly bar is an important factor in the usable depth of a used SANY SR125 rotary drilling rig. A machine configured to drill to 25 m will not reach 40 m simply because a longer option appears in the brochure. Confirm whether the fitted Kelly bar is friction or interlocking, and inspect the number of sections, any applicable locking elements and visible wear at the joints.
Ask the seller to measure the rotary drilling Kelly bar together with you during a video call. Look for dents, cracks or rust that could hide fatigue damage. Also confirm whether the Kelly bar is included in the quote or requires an extra charge. Replacing a Kelly bar can cost a significant proportion of the machine's value, so this item often determines whether the deal is worthwhile.
Rotary drive and crowd: torque and force in practice
The rotary drive converts engine power into cutting torque. For a used machine, check the rated torque on the nameplate and have qualified personnel inspect for oil leaks, unusual noise and play in accordance with the applicable manufacturer procedures. Abnormal braking or play may require further inspection or repair.
The crowd system controls the downforce available during drilling. First confirm the machine's actual crowd configuration. Have qualified personnel inspect its operating response, hydraulic drift and visible wear in accordance with the applicable manufacturer procedures; if crowd ropes and sheaves are fitted, inspect their wear too. The condition of the crowd system affects drilling performance.
Winch, Rope and Drum: Safety and Operating Costs
The main winch is used to lift the Kelly bar and drilling tools. On a used SR125, check the wire rope for broken wires, kinks or corrosion, and check that it is wound evenly on the drum. Uneven spooling layers can damage the wire rope and reduce lifting capacity. Ask about the wire rope's age and replacement records.
Have qualified personnel check winch operation and braking in accordance with the applicable manufacturer procedures, including a load check where those procedures permit. Note unusual grinding or slipping; braking performance should meet the manufacturer's requirements. A winch fault is a safety concern and may also lead to costly repairs.
Undercarriage and Structural Integrity
The tracks and frame carry the entire machine. Check the track pads, track rollers and idler wheels for wear, and check the final drives for oil leaks. Cracks in the track frame or slewing platform can be a fatal problem. Inspect welds and high-stress areas with a flashlight.
Also confirm that the counterweight set is complete and correctly installed. Missing counterweights reduce stability and may cause tipping during drilling. Confirm whether the machine can travel with the rotary drilling Kelly bar installed, or note which components must be removed for transport. This affects on-site setup time and transport costs.
Cold Start and Function Testing: What to Record on Video
A genuine cold start can provide clues about the engine and systems, but cannot by itself establish hydraulic system health. Qualified personnel should conduct cold-start, idle and load-running checks according to applicable manufacturer procedures when equipment and site safety conditions permit. Film the startup from inside the cab, showing the instrument panel, warning lights and any error codes; record unusual smoke, noise or vibration.
When equipment and site safety conditions permit, ask qualified personnel to demonstrate mast, crowd, rotary drive, main winch and crawler travel functions according to applicable manufacturer procedures. Record the movements on video and ask the seller to confirm the date and time; assess condition alongside maintenance records and an inspection of the machine.
Transport and Project Fit: Final Decision Rules
Check the width, height, length and weight of the machine in its actual shipping configuration separately from the dimensions, weight and transport requirements of any components shipped separately. Compare both with road and port restrictions. Extensive disassembly can reduce a compact machine's transport advantage.
Consider the SR125 when the verified drilling plan suits its actual configuration, and compare site access and transport conditions separately. If the project requires deeper piles, harder ground or heavier tooling, first check the actual machine's configuration and applicable capabilities; if it cannot meet the requirements, consider an appropriately larger class.
Make Your Inquiry Count
When you contact GLOBMACH about a used SANY SR125 rotary drilling rig, please provide your pile diameter and depth, soil and rock description, casing method, site access restrictions, destination port, and delivery date. Ask for the serial number, year, drill rod details, and inspection video.
Ask for a quote that lists the machine price separately from additional costs such as tooling, transport and any repairs, and ask whether destination taxes, duties and other charges are included. This information helps estimate the landed cost. A detailed inquiry saves time for both parties and supports a better purchasing decision.
