Ciso Tool
Ciso Tool
Advanced CNC watchmaking parts, high-precision crystals, and structural elements engineered for OEM retrofitting projects.
A Global Standard for Mid-to-High-End Precision Watch Components & Retrofitting Architectures
Founded in 2006, Dongguan Ciso Tool Co., Ltd. has evolved from an early precision engineering structure into a modern integrated manufacturing enterprise. We support international luxury brands, emerging custom modders, and industrial global importers with high-grade horological engineering.
Our infrastructure includes a dedicated R&D engineering division of over 60 professionals operating within a modern 20,000 square meter industrial park. We specialize in turning challenging CAD drawings and complex composite watch specifications into commercial realities.
From sapphire crystal dome configurations to custom iced-out moissanite bezels and high-tolerance ceramic components, we manage the complete lifecycle from prototype engineering, multi-station milling, down to final dust-free room assembly.
How downstream brand owners, aftermarket customizers, and luxury timepiece modifications utilize strategic factory partnerships to leverage structural margins.
The aftermarket watch customization sector is growing rapidly. Importers require high-precision components—like bespoke bezels, ceramic inserts, and CNC-machined case adapters—that seamlessly integrate with iconic cases. Our facilities specialize in micro-tolerance matching so that aftermarket integrations fit with zero play.
Modern retrofitting requires more than standard steel. We offer sintering techniques for super-ceramic bezels, CNC turning for premium 925 sterling silver settings, and deep-dome sapphire crystals with multi-layer anti-reflective (AR) vapor deposition. This elevates durability and performance for custom retrofits.
Managing low-volume, high-mix (LVHM) custom orders alongside massive OEM production runs is a key capability. Ciso balances tooling flexibility with scalable multi-station milling centers. This allows watch brands to pilot test custom modifications before committing to full production runs.
A breakdown of precision tolerances, physical vapor deposition (PVD) processes, and future-proof horological customization.
Deploying high-purity alpha-alumina (Al₂O₃) Verneuil crystals. Our multi-axis grinding and diamond-slurry polishing achieve surface roughness values (Ra) below 0.01 microns. We apply physical vapor deposition (PVD) inside vacuum chambers to coat anti-reflective layers with strict thermal cycling limits, ensuring excellent scratch resistance.
Using high-purity zirconium dioxide (ZrO₂) powders blended with organic binders. Compacted at high pressure and sintered at temperatures exceeding 1400°C, our ceramic inserts shrink to high densities. We use diamond-tipped tools to mill precise sloping bezel profiles, followed by gold or platinum PVD plating inside the engraved markers.
Utilizing high-speed CNC centers to process surgical-grade 316L/904L stainless steel, aerospace titanium alloys, and 925 sterling silver. We maintain positional tolerances of ±0.005mm to ensure watch movements align properly. Dials, cases, and casebacks fit together securely, preserving the case's water resistance.
Visualizing our advanced watchmaking workshops and high-precision CNC machinery in Dongguan.
B2B procurement teams must balance component durability, material traceability, and manufacturing quality.
High-end Swiss or Japanese movement platforms demand case dimensions with tolerances under 5 microns. Variations can compromise sealing or cause dial-hand misalignment.
Providing consistent finish quality. Alternating brushed and polished surfaces must meet high aesthetic standards without tooling marks or micro-abrasions under QC inspection.
Verifiable material quality. From 316L medical stainless steel to VVS Moissanite stones, sourcing must be backed by spectroscopic material certification reports.
Minimizing lead times through close collaboration between R&D engineering and factory floor shifts, reducing prototype-to-shipping cycles to under 30 days.
Ensuring export compliance, environmental standards, and intellectual property protection across global markets.
All components—including rubber straps, adhesive seals, and luminous materials—comply with REACH chemical testing, lead-free parameters, and RoHS regulations, allowing for smooth customs clearance into the EU and North America.
We produce custom watch parts for Swiss watches, maintaining the exact tolerances and materials required to meet Swissness standards when paired with Swiss-assembled movements.
We protect your custom retrofitting ideas. CNC programs and aesthetic designs are secured using isolated intranet systems. We also sign legal NDAs for all custom project clients.
Detailed technical answers for B2B procurement managers and watch project designers.
For custom components like dials or cases, tooling and prototype development takes 15 to 20 days. Once prototypes are approved, mass production takes 30 to 45 days, depending on material complexity (e.g., sintered ceramics or complex CNC titanium setups).
We test water resistance using dry air pressure and wet vacuum chambers up to 30 ATM. We also design matching internal gaskets (such as fluororubber, silicone, or specialized Hytrel plastics) to prevent water ingress.
Yes. By using 3D laser scanners and high-precision coordinate measuring machines (CMMs), we map case dimensions with high accuracy. This allows us to manufacture custom metal, ceramic, or carbon-fiber bezel adapters that fit popular smartwatches and luxury watch designs.
We work with 316L/904L stainless steel, titanium (Grade 2 and Grade 5), carbon fiber, 925 sterling silver, 18K solid gold, and high-purity sintered ceramics. For decorative dials and bezels, we also offer custom options with set VVS Moissanite diamonds.
Explore our range of aftermarket modification components, sapphire crystals, customized cases, and watchmaking tools.
