Sanluo Precision is a professional Chinese manufacturer and supplier of machining grinding. Relying on its own ultra-precision processing capabilities, it provides customers with full-process customized services, supporting the customization of complex and difficult parts. The processing techniques include cylindrical grinding, internal cylindrical grinding, surface grinding, centerless grinding, gear grinding, profile grinding, etc. The company's machining precision capabilities include precision grinding, ultra-precision grinding, and mirror surface grinding. The machining precision can reach IT0 to IT3 levels, with a surface roughness of Ra0.02 to 0.4 μm. It is widely used in bearings, gears, molds, tools, measuring tools, and various precision mechanical components, and is a main process method for obtaining high-precision and high-quality parts.
Sanluo Precision is technologically mature and powerful in various machining processing fields. Its core business covers centreless grinding, internal grinding, internal cylindrical grinding, thread grinding, external cylindrical grinding, surface grinding, and ultra-precision grinding. The services cover multiple high-end fields such as healthcare, unmanned aircraft, robots, precision molds, aerospace, etc. The company's grinding processing precision is at the industry-leading level. The minimum processing diameter of centreless grinding is Φ0.1mm, and the maximum is 200mm. The precision of circularity of the precision grade can reach 0.0005mm. The accuracy of internal diameter and internal circle grinding can reach ±0.001mm, with a surface roughness of Ra0.2 μm. It is suitable for various parts such as cylinder, guide sleeve holes, etc. The grinding accuracy of the outer circle is 0.001mm, and it can meet the requirements of different rotating body parts through various methods such as center type and non-center type. The surface grinding of plane and end face can achieve ±0.001mm precision, with a minimum surface roughness of Ra0.01 μm, balancing efficiency and precision. Ultra-precision grinding even reaches nanometer-level removal, with a size accuracy of ±0.1 to 0.5 μm and a surface roughness of Ra0.01 μm.
The company is equipped with high-precision grinding equipment, strictly controlling key links such as grinding wheel selection, parameter setting, and cooling and chip removal. It has a professional technical team and can provide conventional grinding and customized processing services, covering scenarios such as thread grinding, gear grinding, and forming grinding. It fully meets the strict requirements of various industries for high-precision processing parts, helping customers upgrade product precision.
For purchasing engineers who aim for long-term cooperation, a qualified machining Chinese company must have strong physical capabilities in equipment configuration and must be highly compatible with the requirements. Sanluo Precision Factory has Swiss Studer, German JUNKER, Japanese TOYODA and other brands of cylindrical grinding machines, with the maximum grinding diameter of φ300mm and length of 1000mm. It can achieve IT0 level accuracy, roundness of approximately 0.001mm, cylindricity of approximately 0.002mm, surface roughness of Ra0.1–0.2μm, suitable for cylindrical grinding projects of shafts, pins, and high-demand cylindrical grinding. The CNC cylindrical grinding machine has functions such as online measurement, automatic compensation, and automatic dressing, which can ensure long-term unmanned precision grinding. The inner cylindrical grinding machine has a minimum inner diameter of φ3mm and a maximum inner diameter of φ300mm, suitable for the processing of bearing rings, sleeves, and precision hole systems; the surface grinding machine has a grinding area of 1000×400mm, with a flatness control of 0.001mm and parallelism of approximately 0.002mm, which can meet the surface grinding requirements of key benchmarks such as mold cavities and guide surfaces. The machining grinding capability system can process external round, internal holes, and planes, providing a complete set of precision grinding platforms for high-end equipment manufacturing.
The selection and reasonable configuration of the grinding wheel and grinding fluid during high-precision grinding directly determine whether machining grinding can be stable and controllable. Sanluo Precision is a manufacturing company that provides precision grinding processing. It selects the grinding wheel based on the material and the target surface quality. When grinding common structural steel and mold steel, it uses white corundum or chrome corundum-alumina grinding wheels. When grinding hard-to-machine materials such as hard alloys and ceramics, it uses diamond grinding wheels. When grinding quenched steel and bearing steel, it uses CBN grinding wheels to achieve a balance between grinding efficiency and shape retention. The hardness of the grinding wheel follows the principle of "use a hard wheel to grind soft materials and a soft wheel to grind hard materials". During precision grinding, it generally checks or trims once every 10 to 20 pieces. Using a single-point diamond trimming tool or diamond roller trimming tool to restore sharpness and correct the wheel shape provides stable tool conditions for precision grinding and profile grinding.
The grinding fluid company uses water-based, oil-based, and semi-synthetic grinding fluids. The concentration is controlled between 3% and 5%, the pH value is between 8.5 and 9.5, and the temperature is between 20°C and 30°C. This achieves a balance of cooling, lubrication, cleaning, and rust prevention. Selecting the appropriate spraying method and controlling the flow rate can effectively reduce the temperature in the grinding area, reduce the phenomenon of wheel blockage and burning, and improve the fatigue strength and dimensional stability of the machined surface. The grinding wheel and grinding fluid management system ensures the stability of machining in batch production, including Cpk and qualification rates.
Sanluo Precision is a mature machining and grinding company. In terms of technology, it should have various grinding methods. Moreover, it should be able to select the optimal processing conditions based on the structure and precision requirements of the parts. Sanluo Precision has accumulated rich practical experience in longitudinal grinding (outer circle reciprocating grinding), lateral grinding (cutting grinding), deep and slow feed grinding, and high-speed grinding: Long shaft parts are mostly processed by longitudinal grinding to improve efficiency; short shafts, stepped shafts are more suitable for lateral grinding to achieve higher dimensional and positional accuracy; large allowance parts can adopt deep and slow feed grinding, achieving efficient removal with larger cutting depth and smaller feed; for large quantities of standard parts, the company introduces 80 to 120 m/s high-speed grinding based on equipment conditions, which can significantly shorten the cycle compared to the traditional 30 to 35 m/s linear speed. For parts with high surface quality requirements, the company uses fine-grained grinding wheels, very small cutting depth, and very low feed speed for mirror grinding, enabling the surface roughness to be stably controlled within Ra0.02 to 0.1 μm, providing reliable ultra-precision grinding processing services for high-end bearings, hydraulic components, and mold cavities.
Sanluo Precision provides long-term customized services for the bearing industry (inner and outer rings, rollers), the robot industry (crankshafts, eccentric shafts), the automation industry (plugs, cylinder tubes), and the mold industry (cavities, inserts). The annual processing capacity is approximately 100,000 pieces. By integrating machining grinding, centerless grinding, cylindrical grinding, and precision CNC grinding capabilities under a unified quality system and traceability system, the processing accuracy, surface quality, batch consistency, and delivery on-time rate of the processing plant can be quantified, gradually establishing the concept of Chinese manufacturers and suppliers based on data and processes, and providing global customers with verifiable, traceable, and continuously optimized machining grinding services.
