Ciso Tool
Ciso Tool
Explore our specialized watch rings and high-precision seals designed to satisfy the rigorous technical specifications of Japanese timepiece manufacturers and micro-electronics distributors.
Tokyo stands as a premier epicentre of global horological mastery. The local demand for components demands absolute visual perfection, ultra-precise mechanical clearances, and highly specialized thermal stability. To cater to both heritage watch manufacturers in the Kanto region and rapid-prototyping electronic smart-watch laboratories, chapter rings (rehauts) must be manufactured with tolerances down to the single-micron level.
Whether crafting brushed 316L stainless steel chapter rings or specialized CNC-milled brass and high-temperature silicone seals, Dongguan Ciso Tool Co., Ltd. applies structural and chemical testing protocols designed to satisfy the strict quality requirements of Japanese engineering firms. Quality controls like Optical Comparator Analysis and CMM checking guarantee index alignment is mathematically perfect.
By streamlining raw material procurement and integrating cutting-edge Japanese-designed CNC machines in our facilities, we bypass conventional supply chain friction. We secure material supplies, minimize scrap rates, and maintain direct shipping pathways to the Tokyo Port and Haneda Airport logistics nodes, minimizing delivery times for mass assembly setups.
A Global Benchmark in Precision Watch Components and Integrated Smart Wearable Accessories.
Dongguan Ciso Tool Co., Ltd. was founded in 2006 and 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.
The company operates an independent industrial facility covering over 20,000 square meters and employs more than 500 skilled staff members, including a dedicated R&D team of over 60 professionals. 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.
Ciso focuses 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.
Take an inside look at our advanced engineering floor, where modern machining systems are deployed alongside traditional watch assembly steps to secure unmatched dimensional stability.
How top-tier horological developers select suppliers, optimize dimensional geometry, and integrate materials to guarantee flawless assembly.
Traditional watch dials and crystal gaskets are heavily affected by temperature changes and physical shocks. The watch chapter ring (rehaut) acts as a structural stabilizer. We use ultra-low-expansion metals and precise multi-station milling, achieving concentricity tolerances inside ±0.015mm. This prevents the alignment problems that ruin dials on production runs.
Matching the thermal expansion rates of case components is essential. For sports and luxury timepieces, our custom-engineered NBR, FKM, and high-temperature silicon rings maintain seal integrity at pressures up to 50 ATM. Meanwhile, our custom anodized aluminum and marine-grade brass chapter rings provide chemical resistance against corrosion and moisture build-up.
Smart jewelry and wearable fitness trackers are moving towards bio-sensor integrations. Our R&D division is at the forefront of this shift, combining CNC-milled titanium, high-grade brass, and aluminum rings to house health tracking chips, blood glucose monitors, and NFC aerial systems without adding unnecessary weight.
Guided by the principle of "Quality First, Integrity Supreme," Ciso emphasizes excellence in every production process. The company implements rigorous quality assurance protocols, ensuring that each product meets international standards for durability, precision, and aesthetic refinement. Through consistent quality and reliable service, Dongguan Ciso Tool Co., Ltd. has established long-term partnerships with well-known domestic brands and continues to expand its presence in global markets. The company is committed to honest cooperation, mutual growth, and long-term value creation with international watch brands, striving to elevate the artistry and innovation of modern watchmaking.
Important technical and commercial insights for purchasing managers, watch engineers, and product developers based in Tokyo.
We supply high-grade 316L Stainless Steel, Titanium, CNC-turned Brass, and Anodized 6000-series Aluminum. For smart wearable bands, we offer lightweight materials such as minimal CNC-machined aluminum and biocompatible titanium alloys to ensure durability and comfort.
We utilize high-resolution laser-etching, diamond-cut CNC engraving, and high-precision pad printing. By using optical projection measurements, we ensure alignment tolerances are within ±0.02mm, preventing index alignment issues during assembly.
We offer specialized design engineering, fast prototyping, and reliable sea/air cargo delivery to Tokyo. We ensure all materials comply with RoHS and REACH standards. We also use secure packaging to prevent transit damage and guarantee every batch is ready for your assembly line.
Standard custom tooling takes 15 to 21 days depending on geometric complexity. Mass manufacturing typically takes 30 to 45 days. We also offer expedited production slots for Tokyo-based projects with tight development timelines.
Yes. Our silicone, NBR, and FKM fluororubber o-rings are manufactured to Japanese Industrial Standards (JIS) and ISO 22810. They maintain elasticity and seal integrity in high-temperature environments and under pressures up to 50 ATM.
Select from our wide range of custom sports watches, smart tracker rings, decorative bezels, and specialized CNC precision components.
Get in touch with our design engineers for detailed drawings, custom material specifications, and volume pricing tailored for Tokyo.
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