Sanluo Precision is a professional manufacturer and supplier of micro-machining services in China. We have long focused on the fabrication of minute structures—specifically, the R&D and application of ultra-precision machining technologies with micron- and sub-micron-level accuracy. Leveraging the ultra-precision machining capabilities of our own dedicated facility, we provide customized micro-component manufacturing services to clients worldwide. We specialize in the custom fabrication of complex and technically challenging parts.
The company is capable of consistently machining minute structures with feature dimensions ranging from 0.007 mm to 1 mm, serving a wide array of high-tech sectors including medical devices, optical instruments, electronics and telecommunications, precision instrumentation, and aerospace. As a precision machining manufacturer, Sanluo Precision bases its operations on rigorous technical data and process controls, striving to establish itself as a trusted Chinese micro-machining partner and long-term supplier.
Sanluo Precision has cultivated deep expertise in the field of micro-precision machining over many years, specializing in the custom fabrication of various small-scale, high-precision components. Our core business encompasses multiple specialized categories—including micro EDM machining, laser beam machining, EDM micro-drilling, micro CNC machining, mechanical micro machining, and laser micromachining—positioning our technical capabilities at the forefront of the industry. By focusing intensely on the micro-machining domain, we achieve machining accuracies ranging from the micron level down to the sub-micron level; specifically, our micro-EDM processes can achieve a precision of ±0.001 mm, while for ultra-high-precision components, this tolerance can be tightened to ±0.0005 mm.
Furthermore, our micro-grinding processes achieve dimensional accuracies of up to ±0.0001 mm with surface roughness levels of less than Ra 0.01 μm, thereby meeting the exacting standards required for optical-grade mirror finishes. In terms of micro-drilling via EDM, we are capable of creating micro-holes as small as Φ0.01 mm, with depth-to-diameter ratios reaching up to 20:1—fully accommodating the most demanding high-precision requirements. Technically, the company has successfully overcome critical challenges such as the preparation and fixturing of micro-electrodes, the precise control of micro-energy discharges, and real-time process monitoring. Equipped with advanced machinery—including ultra-precision motion platforms with nano-scale resolution and machine tools featuring high-precision spindle rotation—we have mastered a diverse array of micro machining processes, enabling us to fabricate complex micro-structures (such as micro-grooves, micro-pillars, and micro-lens arrays) while simultaneously ensuring both machining stability and operational efficiency.
Serving a broad spectrum of industries—including aerospace, medical devices, semiconductors, optics, and microelectronics—we provide specialized machining services capable of producing a diverse range of intricate components, such as turbine cooling film holes, interventional medical catheters, and spinneret micro-holes. The company maintains rigorous control over both material procurement and the entire machining workflow. Supported by dedicated teams for process planning and quality inspection, we also offer customized micro-machining services designed to precisely meet the unique and highly demanding processing requirements of various sectors. Our unwavering commitment is to deliver high-quality, high-precision micro-machining services to clients across all fields.
For a Chinese manufacturer specializing in micro machining, advanced machining and inspection equipment technology constitutes the fundamental threshold for entry. Sanluo Precision’s facility boasts an equipment configuration that meets international advanced standards: we are equipped with Swiss Tornos micro-sliding headstock lathes, capable of machining diameters as small as φ0.01mm with a length accuracy of ±0.002mm—ideal for producing slender shaft components such as micro-medical catheters and fiber optic connectors. We also utilize German KERN micro-milling centers, featuring spindle speeds up to 60,000 rpm, positioning accuracy of ±0.001mm, and a minimum milling diameter of φ0.01mm; these are perfectly suited for micro-molds, micro-gears, and microfluidic chips, serving as a core asset in our micro-CNC machining capabilities.
Regarding hole-making operations, our Japanese FANUC micro-hole drilling centers can drill diameters as small as φ0.02mm with a depth-to-diameter ratio reaching 20:1. In the realm of electrical discharge machining (EDM), our Swiss GF micro-EDM machines utilize electrodes as small as 0.02mm, achieving a machining accuracy of ±0.001mm and a surface roughness of Ra0.1μm—a prime example of our advanced micro-EDM capabilities. Finally, our laser micro-machining operations are executed using Trumpf systems, featuring a laser spot diameter ranging from 5 to 50 μm to support a wide array of laser micro machining applications.
To ensure the continuous stability of its machining environment and precision, Sanluo Precision has constructed an ISO 6 (Class 1000) cleanroom within its facility. This environment maintains a temperature of 20 ± 0.1°C and a humidity level of approximately 45 ± 2% RH. Furthermore, the facility is equipped with an active vibration isolation system boasting an isolation efficiency of no less than 95%, thereby maximizing the elimination of external vibrations and environmental fluctuations that could impact the micro-machining process.
In micron- and nano-scale machining, high-end equipment alone is far from sufficient; rather, cutting tools and inspection technologies are the critical factors that define a micro machining company's true capabilities. Regarding tooling configuration, Sanluo Precision employs single-crystal diamond tools for the ultra-precise cutting of metals and engineering plastics. These tools feature cutting-edge radii of less than 50 nm, allowing for surface roughness to be controlled within Ra 0.01 μm. For the engraving of micro-structures, the company utilizes carbide micro-milling cutters with diameters ranging from approximately φ0.03 to 0.5 mm, maintaining tool runout within 0.001 mm.
In micro-hole machining applications, the use of PCD micro-drills—ranging in diameter from φ0.01 to 1 mm—enables high-precision drilling with an accuracy of approximately ±0.002 mm. Through precise measurement and optimized design, the geometric parameters of these tools—specifically the rake angle, relief angle, and helix angle—are controlled with exacting precision. Additionally, the company employs Minimum Quantity Lubrication (MQL) technology to limit lubricant consumption to less than 10 ml per hour, thereby ensuring effective cooling and lubrication while minimizing residual contamination.
In terms of inspection capabilities, Sanluo Precision is equipped with confocal laser microscopes capable of achieving a resolution of approximately 0.1 μm for the 3D topographical measurement of miniature components. The facility also features Scanning Electron Microscopes (SEM) with magnification capabilities reaching up to 100,000x and a resolution of approximately 10 nm, enabling the detailed examination of tool marks, burrs, and micro-cracks. Furthermore, white light interferometers are utilized to measure surface roughness and step heights, offering a vertical resolution of approximately 0.01 nm; when paired with laser diameter gauges, this system achieves a diameter measurement accuracy of approximately ±0.001 mm. This comprehensive suite of tooling and inspection systems ensures the company’s technical advantages and its capability to deliver high-quality, high-standard results in the field of precision micro-machining.
For high-end medical devices and precision optoelectronic products, micro-machining serves not merely as a manufacturing method, but as a critical foundation for product performance and safety. In the medical device sector, Sanluo Precision is capable of machining parts such as cardiovascular stents (approx. 2–4 mm in diameter, 0.02 mm wall thickness), neurosurgical micro-instruments (approx. 0.1–0.5 mm in diameter), ophthalmic surgical blades (edge radius < 10 μm), dental drills (φ0.2–1.6 mm), and hypodermic needles (inner diameter approx. φ0.1 mm)—covering a range of typical medical micro-machining applications.
In the field of optical instrumentation, the company manufactures optical mirror components ranging from approximately φ1 mm to φ10 mm in diameter, achieving surface precision at the λ/10 level. It also supplies connector assemblies for fiber optic systems—featuring apertures of approximately φ0.125 mm with concentricity controlled within 1 μm—and undertakes custom micro machining services for optical elements such as micro-prisms and micro-lenses. Within the electronics, communications, and precision instrumentation sectors, Sanluo Precision has successfully manufactured and delivered a variety of components, including mobile phone camera parts, sensor housings, micro-connector terminals (pitch approx. 0.03–0.5 mm), micro-gears (module approx. 0.1–0.3), and micro-shafts (diameter approx. φ0.02–3 mm).
The company has established long-term custom micro-machining partnerships with numerous Chinese enterprises, maintaining a consistent product acceptance rate of over 99%. It has steadily grown into a trusted micro-machining manufacturer and supplier in China, providing continuous and reliable technical and service support for its clients' high-end product development and mass production initiatives.
