As a leading manufacturer and supplier of precision lathe machining in China, Sanluo Precision specializes in providing global clients with custom machining services for small, high-precision parts—delivered with exceptional accuracy and efficiency. We are fully equipped to handle the customization of complex and challenging components. Swiss machining utilizes a guide bushing to support the workpiece, positioning the cutting tool in close proximity to the machining point; this significantly reduces overhang length, thereby enhancing rigidity and dimensional stability. Consequently, this method is ideally suited for slender shaft-like parts, precision tubular components, and a wide variety of intricate small parts.
Our facility currently houses multiple Swiss-type sliding headstock machines capable of completing multiple operations—including turning, milling, drilling, tapping, knurling, and polishing—in a single setup. We accommodate diameters ranging from approximately φ0.03 mm to φ32 mm and lengths up to 300 mm. Our machining capabilities feature a dimensional accuracy of ±0.002 mm, a concentricity of 0.003 mm, and a surface roughness of Ra 0.2 μm, enabling us to meet the rigorous demands of high-end clients requiring Swiss machining services.
As a premier Chinese manufacturer and supplier of lathe machining solutions, Sanluo Precision has cultivated deep expertise in sliding headstock technology. We offer a comprehensive suite of Swiss-type machining services—including CNC Swiss machining, precision CNC Swiss machining, and Swiss lathe operations—with a specific focus on the mass production of small, precision parts. We also provide custom solutions for complex and technically challenging components. Our machining precision reaches the micron level, featuring minimum dimensional tolerances of ±0.0001 mm, roundness within 0.002 mm, and surface roughness as fine as Ra 0.05 μm. Furthermore, we can accommodate parts with a length-to-diameter ratio of up to 100:1, perfectly meeting the exacting standards required in high-end sectors such as aerospace, medical implants, and semiconductors.
Our facility is equipped with top-tier Swiss-type sliding headstock machines from leading brands such as Citizen, Tsugami, and Star. These machines support multi-axis simultaneous machining, allowing for the completion of turning, milling, drilling, and tapping operations in a single continuous process. The coordinated operation of main and sub-spindles maximizes efficiency while eliminating potential errors associated with secondary setups. Leveraging fully automated production lines, rigorous precision control protocols, and a climate-controlled machining environment, we produce tens of millions of ultra-precision parts annually with a quality acceptance rate of 99.95%. We serve high-end clients worldwide by consistently delivering stable quality and highly efficient service.
With its reliable lathe machining technology, Sanluo Precision can effortlessly achieve consistent linearity and concentricity when processing slender shafts and precision tubular components. Sanluo Precision’s facility utilizes a guide-bushing-supported "sliding headstock" structure; the workpiece is fed through a guide bushing, resulting in a typical overhang length of ≤5mm. Since cutting operations are performed directly in front of the guide bushing, the process can accommodate length-to-diameter ratios of up to 50:1, thereby significantly mitigating the risks of bending and vibration inherent in machining slender parts.
Our machining capabilities cover shafts and small-diameter parts ranging from φ0.05mm to φ32mm in diameter and up to 300mm in length. We maintain tight tolerances—diameter tolerances of ±0.002–0.02mm, length tolerances of ±0.005–0.05mm, concentricity within 0.001–0.003mm, and roundness within 0.002–0.008mm—while achieving surface finishes ranging from Ra 0.2 to 1.6μm. This provides a stable and robust foundation for high-precision machining and subsequent assembly processes.
Swiss-type machining differs fundamentally from standard CNC turning methods. Its unique sliding headstock structure—combined with the synchronized operation of main and sub-spindles—offers inherent advantages for the precision machining of slender shaft-like components. Sanluo Precision is equipped with advanced precision sliding-headstock machines capable of processing parts ranging from φ0.05mm to φ32mm. These machines feature spindle speeds of 8,000–12,000 RPM and utilize guide-bushing support to limit workpiece overhang to ≤5mm.
The integrated main-spindle/sub-spindle configuration enables simultaneous machining on both ends of the workpiece. Furthermore, with 4-axis simultaneous control (X, Z, Y, and C axes) and the use of multiple live tools, a single setup allows for the completion of various operations—including turning, milling, drilling, tapping, and cutoff—in a single pass. Supported by automated bar-feeding systems, we can continuously process bar stock ranging from φ0.5mm to φ32mm, enabling uninterrupted 24-hour production runs that are ideally suited for high-volume Swiss machining projects. The inner bore of our precision ceramic or carbide guide bushings features an accuracy of approximately ±0.002mm. Highly wear-resistant and possessing exceptional concentricity, these bushings effectively prevent surface scratching on workpieces during production.
Relying solely on manual experience for machine setup—without the support of a systematic process database and real-time inline inspection—makes it impossible for "precision Swiss machining" operations to meet the high-quality demands of mass production. At the process level, Sanluo Precision optimizes tool geometry and cutting parameters based on specific material properties and structural designs. For slender shafts with a length-to-diameter ratio of ≥50:1, we can achieve a concentricity of approximately 0.005mm and a straightness of about 0.01mm per 100mm.
Our high-precision CNC systems boast a repetitive positioning accuracy of ±0.002mm, ensuring a batch consistency (Cpk) of ≥1.67. Through in-process sampling and real-time measurement of critical dimensions, we implement automatic compensation to establish a closed-loop control system. Complex part features—such as eccentric structures, square heads, keyways, cross-holes, and threads—can be completed within a single clamping setup. This significantly reduces clamping errors, resulting in a tighter distribution of dimensional tolerances across the batch and creating a more comprehensive record for traceability.
We specialize in lathe machining and have successfully penetrated high-end sectors such as medical devices, precision instrumentation, and electronic and optical communications. Sanluo Precision’s high-precision machining capabilities are now widely applied across multiple fields: In the medical device sector, we manufacture TC4 titanium alloy orthopedic screws (ranging from φ0.3–8mm in diameter and 20–80mm in length, featuring Grade 6 thread accuracy and a surface finish of Ra0.2μm), as well as dental implants, 316L stainless steel catheter components, and more.
In the fields of precision instrumentation and optics, we produce brass optical shafts and sensor shafts with a length-to-diameter ratio of ≥40:1; both concentricity and runout are controlled to within approximately 0.005mm, thereby meeting the stringent requirements for high rotational speeds and exceptional stability. In the electronics and telecommunications sectors, copper alloy connector pins—typically ranging from φ0.5 to 3 mm in diameter and 5 to 30 mm in length—exhibit excellent conductivity and corrosion resistance following gold or nickel plating. Aluminum alloy components for mobile phone cameras, ranging from φ0.3 to 8 mm in diameter, achieve dimensional tolerances of ±0.002 mm and ensure consistent surface finishes after undergoing Swiss-type machining and anodizing treatments. In the automotive and industrial sectors, stainless steel fuel system components—as well as various small shafts and tubular parts for sensors—are also mass-produced using Swiss machining techniques, thereby guaranteeing superior pressure resistance, sealing integrity, and dimensional stability.
Sanluo Precision possesses mature technical expertise in the fields of CNC Swiss machining, Swiss-type machining, and Swiss lathe operations. We have provided customized lathe machining services to renowned enterprises such as Mindray Medical and Huawei, producing millions of Swiss-machined parts annually. Through our commitment to high precision, high efficiency, and production consistency, we have established a reputation as a trusted Chinese manufacturer and supplier within the precision lathe machining and Swiss-type machining industries.
