Are you still searching for a manufacturer capable of both supplying fasteners in bulk and providing on-demand customization? Choose Qingdao Tuoyuan from China. We do not produce low-end, generic bolts; instead, we specialize in turned fasteners—components featuring tighter tolerances, more precise threading, and an exceptionally high surface finish, designed to withstand greater mechanical stress.
Tolerance Control: Stamped parts often exhibit dimensional deviations, whereas our turned fasteners—produced via CNC programming—ensure that every step and every thread section is precise and flawless.
Complex Geometries: We can machine non-standard fasteners featuring holes, slots, uniquely shaped steps, or specialized heads—complex structures that are impossible to achieve through traditional stamping processes.
Diverse Material Selection: While stamping processes impose strict requirements on material plasticity, turning allows us to process high-hardness stainless steels (such as 316L), titanium alloys, free-cutting steels, and high-performance brass.
As the initial step prior to manufacturing, we conduct a feasibility analysis based on the technical drawings you provide. We then select the most suitable equipment by carefully evaluating the material specifications (such as stainless steel, aluminum, brass, etc.) and tolerance requirements.
Once the manufacturing plan and materials have been finalized, we proceed to the machining phase. Our facility is equipped with 10 dual-spindle Swiss-type lathes and 20 high-speed CNC lathes, enabling highly efficient rotational machining of parts.
Upon completion of machine setup, a "First Article Inspection" is performed; mass production commences only after all parameters have been verified to meet the required standards.
Leveraging our in-house automated coating lines and eco-friendly electroplating workshop, we offer a range of surface treatments, including zinc-nickel alloy plating, anodizing, powder coating, and vacuum heat treatment.
This processing step significantly enhances the parts' rust resistance and wear resistance in harsh environments, while also ensuring they possess the requisite hardness.
We conduct comprehensive quality inspections using advanced equipment such as Coordinate Measuring Machines (CMM), 2.5D Vision Measuring Systems, Go/No-Go gauges, and surface roughness testers. Furthermore, utilizing our ERP system, we meticulously record inspection results for every stage of the process to ensure full quality traceability.
Ultrasonic Cleaning: Removes residual oils and contaminants left over from the machining process.
Customized Packaging: For parts featuring precision threads or surfaces prone to scratching, we employ specialized packaging—such as blister trays, anti-rust paper, or custom-made wooden crates—to ensure zero damage during international transit.
Efficient Logistics: Backed by extensive export experience spanning over 20 countries and regions, we provide punctual and reliable global logistics support.
✔ Non-standard & Custom-shaped Parts: Complex screws, double-ended studs, and flanged pins customized according to technical drawings.
Applications: Internal automotive engine components, precision instrument assembly.
✔ Precision Shafts & Pins: Stepped shafts, dowel pins, hinge pins, and piston pins.
Key Features: These parts demand extremely tight tolerances on diameter and concentricity—standards that are difficult to achieve via cold heading, making turning the mandatory manufacturing method.
✔ Integrated Assemblies: Single-piece components formed by combining a screw with a washer, or a pin with a shaft.
Advantages: Ready for direct assembly by the customer, thereby streamlining the overall assembly process.
✔ Large-Diameter, Small-Batch Fasteners: For specialized fasteners with very large diameters or those required in quantities of only a few dozen, the cost of creating cold-heading dies is prohibitive; consequently, turning represents the most economical manufacturing choice.
✔ Specialized Material Parts: Fasteners manufactured from materials that are difficult to form—such as titanium alloys, stainless steel, and PEEK—where turning offers superior quality control compared to cold heading.
