Ciso Tool
Ciso Tool
Explore our high-performance components engineered to Swiss-level tolerances and compliant with EU regulatory frameworks.
Analysis of high-end horological component supply chains and micro-assembly manufacturing standards.
The contemporary watch accessory and component industry is undergoing a significant transformation. Once highly centralized within boutique Swiss regions, the manufacturing of high-grade watch components—including cases, custom hands, spring bars, and crowns—has shifted toward advanced technological hubs in Asia. Specifically, Southern China has evolved into a global epicenter for micro-precision component manufacturing. The demand for CE certified watch accessory kits has surged dramatically as global watch brands, high-end repair centers, and custom aftermarket watch modification (modding) businesses scale up operations.
Modern micro-engineering allows manufacturers to construct high-integrity watch parts that achieve dimensional tolerances under ±0.005mm. This level of precision is critical for the seamless compatibility of parts with legendary movements such as the Seiko NH35/NH36 series, the ETA 2824, and proprietary calibers like the Rolex Caliber 3135.
How certified suppliers guarantee product reliability, chemical safety, and structural durability.
All accessories, including O-ring seals, crowns, and spring bars, undergo rigorous chemical composition testing to ensure nickel-free, non-toxic, and hypoallergenic interaction with skin.
Engineered precisely to match standard post heights and pinion dimensions for automatic mechanical calibers such as Miyota, Seiko NH series, and Swiss-made Sellita/ETA movements.
Utilizing premium 316L stainless steel, Grade 2 or 5 titanium, and specialized sapphire crystal elements. Resistance to marine corrosion, impact, and magnetic fields is standard.
A premier global manufacturer of high-precision watch components and complete horological assembly designs.
Founded in 2006, Dongguan Ciso Tool Co., Ltd. is a professional manufacturer specializing in the research, development, and production of mid-to-high-end precision watch components and complete watch solutions. Formerly operating under an earlier corporate structure, the company has grown into a modern manufacturing enterprise with strong integrated capabilities across design, engineering, and precision production.
Operating an independent industrial facility covering over 20,000 square meters and employing more than 500 skilled staff members, including a dedicated R&D team of over 60 professionals, Ciso implements advanced manufacturing technologies to guarantee consistency. With advanced production equipment, strict quality control systems, and experienced technical personnel, Ciso is committed to delivering high-precision, high-consistency products for global watch brands.
Our focus remains on the R&D and manufacturing of premium watch accessories, including watch dials, watch cases, watch straps, watch buckles, and precious metal components such as 18K gold watch parts and fine jewelry accessories. In addition, the company provides full ODM and OEM services, supporting complete watch customization from concept design and prototyping to mass production and assembly. Guided by the principle of "Quality First, Integrity Supreme," we implement rigorous quality assurance protocols, ensuring that each product meets international standards for durability, precision, and aesthetic refinement.
A visual overview of our advanced production lines, tooling machinery, and testing facilities.
How high-grade materials and engineering standards are shaping the future of global timepieces.
We are shifting from classic alloys to advanced biocompatible matrices. The integration of Super-LumiNova BGW9 and C3 compounds into precision-cut watch hands guarantees intense, long-lasting photoluminescence that complies with global radioactive safety directives.
Incorporating advanced CAM automatic lathes and wire-cutting machinery ensures repeatability. Even tiny components, like the internal threads of customized watch crowns (6mm, 7mm, 8mm), achieve a perfect torque seal for diving applications up to 30 ATM.
Deploying 20W fiber laser marking machines ensures clear, high-resolution branding, serialized tracing codes, and decorative patterns on metal case backs, bezels, and complex custom dials without altering the structural integrity of the steel.
Depending on the geographic focus, watch accessory kits serve different target market segments:
Addressing core engineering, supply chain compliance, and technical questions about watch component manufacturing.
CE certification confirms that watch components—especially metallic parts, seals, and straps—meet EU safety, health, and environmental protection requirements. For watch importers and brands selling within the European Economic Area (EEA), importing CE certified kits protects them from regulatory penalties, customs seizures, and consumer product liability claims related to heavy metal allergies (such as nickel release).
At Dongguan Ciso Tool Co., Ltd., our CNC and CAM machinery controls tolerances within ±0.005mm to ±0.01mm. This high precision is required to ensure that watch hands press correctly onto the gear train pinions without damaging the movements, and that threaded crowns maintain secure water resistance.
Yes, we provide full ODM and OEM services. We support custom watch component production from the design stage and rapid prototyping to mass manufacturing, dial decoration, custom laser etching, final assembly, and functional testing.
Our watch accessory kits are engineered for high compatibility with standard calibers. These include the Seiko Instruments (SII) NH35, NH36, NH34 GMT, Citizen/Miyota 8215/9015, Swiss ETA 2824-2, Sellita SW200, and standard Rolex 3135 replacement parts.
We use dedicated dry air-pressure and wet water-pressure testing equipment in our quality inspection department. Each case assembly, including the O-ring seals, sapphire glass, and crown system, is tested to verify compliance with ratings from 3 ATM up to 30 ATM, depending on project specifications.
Premium replacement options, sealing components, and engraving tooling designed for watch manufacturers.
