Sanluo Precision is a professional manufacturer and supplier of micro EDM machining services in China, offering users ultra-precise, customized micro-machining solutions. We specialize in the custom fabrication of complex and challenging parts. By utilizing micro-electrodes—with structural dimensions as small as 0.01 mm—for electrical discharge machining, we can create intricate micro-features that are impossible to achieve using traditional machining methods. These features include micro-holes (with diameters as small as φ0.02 mm and depth-to-diameter ratios reaching 50:1), micro-shafts (with diameters as small as φ0.05 mm and coaxiality tolerances of 0.002 mm), miniature groove structures (e.g., 0.02 mm × 0.07 mm), micro-molds (such as molds for microfluidic chips and micro-injection molding), as well as various micro-shaped holes—including square, polygonal, and other irregular geometries.
Our services are primarily applied in fields such as miniature medical devices, precision molds, microfluidic chips, fiber optic connectors, and spinnerets. Leveraging high-precision positioning systems (with a resolution of 0.1 μm), advanced micro-electrode fabrication techniques, and precision discharge control systems, Sanluo Precision achieves micron-level machining accuracy, providing clients with high-quality, customized micro-part fabrication.
Micro EDM machining is a high-end, precision, and specialized machining technology derived from traditional electrical discharge machining. It focuses on the high-precision manufacturing of miniature parts, micro-holes, micro-scale 3D structures, and complex contours. By employing low-energy pulse power supplies, micro-electrodes, precision servo controls, and optimized processing parameters, we ensure stable and reliable machining operations. Our capabilities include using electrodes as small as φ0.01 mm, producing hole diameters ranging from φ0.01 mm to 0.3 mm, achieving depth-to-diameter ratios of up to 50:1, maintaining dimensional tolerances of ±0.001 mm (with ultra-high precision reaching 0.0005 mm), and achieving optimal surface roughness levels down to Ra 0.05 μm.
Sanluo Precision possesses mature expertise in the fields of micro-EDM, micro-drilling, medical micromachining, precision micro-EDM, and miniature machining. We offer both standard and custom machining services—ranging from micro-holes, deep holes, and angled holes to complex microstructures—serving a wide array of industries including aerospace, medical devices, precision molds, microelectronics, MEMS, and chemical fibers. Through micron-to-nanometer-level precision control, stable processes, and comprehensive online monitoring and compensation systems, we provide our clients with high-quality, ultra-precision micromachining services.
As a manufacturer and supplier specializing in precision micro-EDM machining, we possess the capability to maintain absolute control over hole diameters, slot widths, and positional accuracy down to the micron level. Sanluo Precision employs micro-electrodes ranging from φ0.01 to 0.5 mm to machine micro-holes (φ0.02–1 mm) and micro-slots (0.03–0.5 mm in width) with depth-to-diameter ratios of ≥20. During low-energy pulsed discharge, the energy per pulse is extremely low—ranging from just 10⁻⁹ to 10⁻⁶ J. This results in minimal material removal per pulse, achieving a surface roughness of Ra 0.2–0.8 μm and a heat-affected zone of less than 5 μm. This approach significantly mitigates the risk of edge collapse and micro-cracking in microstructures, forming the fundamental basis of our precision micro-EDM technology.
Without the support of high-precision equipment and inspection systems, it is impossible to guarantee process stability and control—and, consequently, impossible to ensure on-time delivery. As a specialized provider of micro-EDM machining services, Sanluo Precision utilizes dedicated micro-EDM machines capable of accommodating electrode diameters ranging from φ0.01 to 0.5 mm. These machines achieve a machining accuracy of ±0.003 mm and a surface roughness of approximately Ra 0.4 μm. Furthermore, our integrated microscopic observation system—featuring a magnification range of 100x to 500x—enables real-time monitoring of the machining zone with a positional accuracy of ±0.001 mm. Our micro-electrodes are fabricated using precision wire-cutting and micro-grinding techniques.
With a diameter of φ0.02mm, a roundness of 0.002mm, and a smooth surface finish, these electrodes facilitate highly stable electrical discharge. The automated servo-controlled feed system boasts a positioning accuracy of 0.0001mm and features adaptive gap adjustment to prevent short circuits and wire breakage. This system, combined with a working fluid circulation system featuring 1μm-level filtration precision, ensures that the entire Micro EDM machining process remains stable and fully controllable.
If electrode preparation is inadequate or discharge parameters are set incorrectly, deep-hole machining operations can easily result in carbon accumulation or thermal damage, making it difficult to truly meet the stringent precision requirements of micro-structure fabrication. Sanluo Precision’s process control standards involve using tungsten wires (φ0.01–0.3mm) to fabricate micro-electrodes (φ0.02–0.1mm) via electrolytic diameter reduction, achieving a roundness of 0.001mm. Additionally, copper electrodes (φ0.05–0.5mm) are processed using micro-milling or wire-cutting techniques, resulting in a surface roughness of Ra 0.2μm.
Our discharge parameters are configured within a process window defined by an open-circuit voltage of 80–200V, a peak current of 0.1–5A, a pulse duration of 0.1–10μs, and a discharge gap of 0.005–0.02mm; these settings are fine-tuned according to the specific material and structural requirements of the workpiece. During deep-hole machining, a high-pressure working fluid (0.5–2 MPa) is utilized for flushing; this ensures that deep holes—ranging from φ0.1mm to φ0.5mm with a depth-to-diameter ratio of ≥30—maintain excellent perpendicularity and surface quality.
For multi-hole array machining, simultaneous processing of multiple holes can be executed based on a single reference datum, achieving a positional accuracy of approximately ±0.005mm and exceptional consistency in hole spacing. This capability makes our process ideally suited for the mass production of multi-hole components, such as nozzles and inkjet print heads.
Sanluo Precision’s high-precision micro-EDM machining services span a wide range of high-end application sectors. In the medical field, we produce micro-surgical instruments and minimally invasive surgical blades ranging from 0.006 mm to 0.3 mm. For precision molds, we are capable of machining intricate mold cavities, mobile phone button profiles, and small-module precision gears; this includes deep, narrow slots with widths of approximately 0.1 mm and depths of about 3 mm, as well as miniature guide pillars and bushings with diameters ranging from φ0.1 mm to 3 mm, featuring fit clearances of approximately 0.005 mm and dimensional accuracy of ±0.003 mm. For minimally invasive instruments, we achieve positional accuracy of approximately ±0.005 mm for dense arrays of holes ranging from φ0.3 mm to 1 mm.
Furthermore, we manufacture drug-delivery microneedles with pore diameters of 0.05–0.2 mm and lengths of 1–5 mm—featuring a depth-to-diameter ratio of ≥20—thereby meeting the stringent requirements for disposable precision medical devices.
In the aerospace sector, we machine nozzle holes with diameters of 0.1–0.3 mm (in quantities ranging from 20 to 100 per component), utilizing precise angle control to ensure optimal atomization. We also produce blade cooling holes with diameters of 0.3–0.8 mm, tilt angles of 30°–45°, and depths of ≤20 mm, thereby ensuring a perfect balance between cooling efficiency and structural integrity. In the electronics and semiconductor fields, we machine inkjet print heads with nozzle diameters ranging from 0.02 mm to 0.05 mm and densities of 100–300 nozzles per square centimeter, achieving a nozzle positional accuracy of ±0.003 mm. Additionally, we machine semiconductor lead frames with slot widths of 0.05 mm, depths of 0.3 mm, and surface roughness levels of Ra 0.2 μm.
For precision instrumentation, we produce fiber optic ferrules with bore diameters of 0.125 mm—achieving an accuracy of ±0.001 mm and a perpendicularity of approximately 0.003 mm—as well as microfluidic chips featuring channels ranging from 50 to 200 μm in width and 100 to 500 μm in depth, capable of accommodating complex network structures. Sanluo Precision has provided micro-EDM machining services for fine components to clients such as Huawei and Foxconn, producing tens of thousands of such parts annually. The consistent delivery of micron-level precision, stable quality, and mature processes demonstrates the technological advantages possessed by Chinese manufacturers and suppliers of micro-EDM machining in the field of ultra-precision micro-machining.
