Custom watch accessories 316L Trustworthy five-axis CNC machined watch case parts

Stainless steel, such as 316L, is widely used in high-end watchmaking due to its excellent corrosion resistance, suitable strength, good luster, and hypoallergenic properties. However, achieving the micron-level precision, complex three-dimensional curved surfaces, mirror polishing, and silky brushed texture required for watchmaking in high-hardness, work-hardening-prone stainless steel presents the ultimate challenge to manufacturing processes. CNC machining, with its digital, multi-axis linkage ultra-precision machining capabilities, has become an indispensable core technology in modern high-end watchmaking, endowing stainless steel watch parts with a level of precision, complexity, and consistency that is difficult to achieve with traditional handcrafting.

Custom watch accessories 316L Trustworthy five-axis CNC machined watch case parts

What are the advantages of CNC machining of stainless steel watch parts?

I. Achieving non-destructive forming of complex geometric shapes at the micron level

1) The design of high-end watches has long surpassed simple geometry; their cases and lugs are often composed of complex multi-curved surfaces, sharp chamfered corners, and intricate layered structures. Traditional stamping and hand shaping cannot guarantee absolute precision in batches.

2) Precision Milling of Complex Curved Surfaces and Three-Dimensional Structures: A five-axis CNC machining center can "carve" the main shape of the watch case, the smooth transition between the lugs and the middle case, and the bevels or grooves on the bezel from a solid stainless steel billet through continuous and precise movement of the cutting tool in three-dimensional space. Every subtle curve in the design drawings can be faithfully reproduced, with errors controlled within the micrometer level (±0.005 mm), which is the foundation for ensuring perfect polishing and assembly later.

3) Simultaneous Machining of Fine Features and Internal and External Structures: CNC can not only complete the external shape in one process, but also simultaneously machine the steps inside the watch case for housing the movement, the crystal pressing groove, the waterproof gasket groove, and the spring bar holes of the bracelet. This integrated machining ensures the absolute coaxiality and dimensional coordination of the internal and external structures, providing physical protection for the stable installation of the movement and excellent water resistance.

II. Conquering Stainless Steel Material to Create a Superior Surface Texture

1) The ultimate charm of a stainless steel watch case largely stems from the light and shadow effects and tactile feel of its surface. This requires a substrate with near-perfect geometric flatness and controllable texture direction.

2) Laying a perfect foundation for top-tier polishing and brushing: The surface after CNC precision milling has extremely high flatness, straightness, and contour accuracy, with uniform and controllable residual machining marks.

3) Direct creation of complex surface textures: For circular satin finishes or unique engraved patterns on the sides of the case or bezel, CNC can directly create highly consistent and uniform primary textures during the machining stage using specific tools and toolpaths, which are then refined to achieve the final effect.

III. Ensuring stringent water resistance and structural reliability

1) The water resistance performance of watch components depends on the precise fit of multiple components, the core of which is the multiple sealing interfaces between the case, crystal, case back, and crown.

2) Ultra-high precision machining of the sealing surfaces of watch components: CNC can machine the planes and steps for mounting the crystal and case back with extremely high precision. The flatness, perpendicularity, and dimensional tolerances of these mating surfaces are controlled within a very small range to ensure that the sealing ring can be compressed evenly, thereby achieving reliable waterproofing for tens or even hundreds of meters.

Company Profile

    We are a manufacturer integrating industry and trade. We have more than 20 years of experience in production technology. We are located in Dongguan City, Guangdong Province, China. We have advanced high-end professional production and processing technology, and are committed to innovative R&D and production. After years of  market tempering and exploration, it has high-quality   technical management personnel, experienced designers, R&D personnel and a   perfect company management system cnc precision.

5-axis CNC workshop

         Our factory has a plant area of about 2,000 square meters and masters core processing technologies. It has high-end precision production equipment cnc precision: CNC lathes, 5-axis CNC, 4-axis CNC, stamping equipment, die-casting equipment, etc. 2.5-dimensional detection equipment ​

two-dimensional testing

cnc precision surface treatment

          For surface treatment, our suppliers have been working with us for many years. They have rich experience and are familiar with all the quality requirements of each other. The quality is stable and more guaranteed. Such as: heat treatment, spray painting, powder coating, blackening, silver/gold plating, electrolytic polishing, nitriding, phosphating, nickel/zinc/chromium/TiCN plating, anodizing, polishing, passivation, sandblasting, galvanizing, heat treatment , hardening, laser marking, etc. according to customer requirements. Aluminum alloy surface oxidation

Product Packaging

Packaging Details

1. Commercial packaging: 1pc/plastic bag + color box +carton + pallet;
2. Industrial packaging: (1). plastic tube + carton + pallet; (2). plastic bag + kraft paper + carton + pallet;
3. According to the requirement of customer.