Sanluo Precision is a specialized manufacturer and supplier of lathe machining services in China. We provide precision turning for rotational shaft-type components, offering clients comprehensive, customized services ranging from conventional turning and CNC turning to single-spindle turning and turn-milling operations. We are fully equipped to handle the customization of complex and challenging parts.
Our facility currently houses over 80 various lathe machines, capable of processing parts with diameters ranging from φ0.2 mm to φ200 mm and lengths from 10 mm to 800 mm. We support the entire production lifecycle—from prototype development and small-batch validation to large-scale, long-term supply. Lathe machining is one of the most fundamental and critical processes in mechanical manufacturing; it is widely applied across diverse industrial sectors—including automotive, aerospace, general machinery, and electronics—and serves as the primary method for manufacturing numerous critical components.
Sanluo Precision specializes in precision lathe parts, CNC lathe machining, Swiss-style machining, general turning, and facing operations. Leveraging mature technologies and exceptional precision, our services cater to various fields, including precision molds, automotive manufacturing, medical devices, and aerospace. In lathe machining, the workpiece's rotation serves as the primary motion while the cutting tool's movement acts as the feed motion. This process allows for dimensional tolerances as tight as ±0.002 mm and surface roughness levels (Ra) between 0.1 µm and 0.8 µm, enabling us to precisely control the four core aspects of precision: dimensions, geometric shape, positional accuracy, and surface quality.
CNC lathe machining relies on computer program control to achieve machining accuracies of up to 0.002 mm, maintaining coaxiality within a tolerance of 0.002 mm. This capability allows us to execute a wide variety of operations—such as external turning, internal boring, and thread cutting—thereby meeting the diverse requirements of various precision components. For facing (flat surface) operations, we employ traditional grinding processes to achieve accuracies of up to ±0.002 mm and surface roughness levels (Ra) of 0.2 µm. By utilizing methods such as peripheral grinding and face grinding—combined with specialized workholding solutions like magnetic chucks and custom fixtures—we ensure exceptional processing stability and consistency.
The company possesses extensive experience in material handling and precision control, enabling us to provide customized machining services. We maintain rigorous quality control at every stage—from workholding and positioning to process segmentation and dimensional inspection—striving to fully meet our clients' high-precision and specialized requirements for various lathe-machined and face-machined components.
For global procurement engineers seeking a reputable lathe machining company in China, the primary requirement is sufficient equipment infrastructure, encompassing both broad coverage of machining capabilities and operational redundancy. Sanluo Precision’s facility is comprehensively equipped with a full range of machinery, including manual lathes, CNC lathes, Swiss-type lathes, turret-type lathes, and turn-mill centers: Our manual lathes (such as the CA6140 and C620 models) feature a maximum machining diameter of approximately φ300mm and a maximum length of 800mm, making them ideal for single-piece or small-batch orders.
Our CNC lathes are equipped with advanced control systems from FANUC, Siemens, and GSK; they offer a maximum machining diameter of approximately φ200mm and a maximum length of 800mm, boasting a positioning accuracy of ±0.001mm and a repeatability of ±0.002mm—capabilities that allow for the highly efficient execution of CNC lathe machining projects and the production of precision CNC components.
Our Swiss-type lathes—featuring equipment from leading brands such as Tornos (Switzerland), Tsugami (Japan), and Star (Japan)—are optimized for the efficient machining of slender, high-precision shaft components with diameters under φ32mm and lengths under 150mm, reaching spindle speeds of up to 10,000 RPM. Finally, our turn-mill centers integrate the capabilities of multiple processes—including turning, milling, drilling, and boring—allowing for the multi-sided machining of complex parts in a single setup. This integrated approach effectively minimizes fluctuations in production cycle times caused by workholding errors.
Sanluo Precision is a specialized precision machining and manufacturing firm that has established a comprehensive system of technical parameters and control standards specifically tailored to lathe machining processes. External turning operations allow for the machining of cylindrical, conical, and contoured surfaces. Diameter tolerances can be consistently maintained within IT1–IT6 grades, with roundness and cylindricity held to approximately 0.002 mm, while surface roughness can be controlled within the range of Ra 0.1–3.2 μm. When employing precision turning processes for critical shaft components, a single-side machining allowance of approximately 0.1–0.3 mm is utilized. With cutting speeds ranging from 80 to 150 m/min and feed rates between 0.005 and 0.15 mm/rev, surface roughness can be controlled within Ra 0.1–0.8 μm, thereby fully meeting the stringent requirements of precision turning.
Internal turning (boring) enables the machining of through-holes, blind holes, stepped holes, and similar features, with hole diameter tolerances controlled within IT1–IT7 grades and roundness maintained at approximately 0.002 mm. For deep holes with a length-to-diameter ratio (L/D) greater than 5, specialized deep-hole boring tools and high-pressure cutting fluids are employed to facilitate chip evacuation and ensure the quality of the hole walls. Thread turning capabilities cover metric, imperial, and trapezoidal threads, with pitch accuracy maintained at approximately ±0.05 mm and thread profile angle accuracy at approximately ±30'. Face turning operations allow for the machining of flat, concave, and convex end faces, with flatness controlled to within 0.002 mm and surface roughness maintained at Ra 0.1.
In terms of long-term partnerships, Sanluo Precision offers clients not only standardized CNC turning services but also strategic planning tailored to the specific structural characteristics and volume distribution of their products. We meticulously coordinate the transition between the initial "small-batch CNC machining" phase and the subsequent "CNC mass production" phase, leveraging the standardization of tooling and the universalization of fixtures to effectively reduce overall manufacturing costs.
The company has successfully provided customized lathe machining services across diverse sectors—including eccentric shafts, gear shafts, piston rods, and pump and valve components—boasting an annual machining capacity of approximately 2 million parts. Throughout these operations, our finished product acceptance rate has consistently remained above 99.5%. Leveraging a comprehensive equipment infrastructure, mature process capabilities, rigorous quality control, and collaborative engineering support, Sanluo Precision is continuously enhancing its overall competitiveness as a Chinese manufacturer and supplier of lathe machining services, providing global clients with verifiable and traceable custom machining solutions.
