Ciso Tool
Ciso Tool
Engineered to strict dimensional tolerances for professional assembly and watchmaking maintenance
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.
Bridging Swiss Quality Standards and Chinese Micro-Manufacturing Scale
The watchmaking industry has transitioned from a traditional craft into a highly automated, micro-precision technological domain. Horological tool manufacturing sits at the intersection of micro-engineering and material science. Modern mechanical movements, such as the ETA 7750, NH35, and calibers from luxury brands, require specialized component installation, calibration, and adjustment tools that are completely non-destructive and precise to the micrometer.
Worldwide, horological service networks demand consistent, durable, and highly precise tools. A tool that deviates by even 3 micrometers can scratch a custom-polished crown or score a bridge. Dongguan Ciso Tool Co., Ltd. addresses this industry-wide pain point. By applying aerospace-grade CNC processes and advanced metallurgical treatments, we bridge the gap between high-overhead European manufacturing and the need for scalable, high-grade watchmaker gear.
We supply repair chains and brand service centers with calibrated micro-screwdrivers, spring-bar pliers, case-back openers, and custom movement holders to prevent component damage.
We build movement components, custom crowns (6mm-8mm in titanium, stainless steel, and gold), and balance-staff adapters using multi-station Swiss-type milling.
Custom bezels, case-back testers, and hand-setting tools that enable micro-brands and customizers to reach professional tolerances without buying expensive, single-brand Swiss machinery.
Tour our 20,000 square meter factory floor, clean-room assembly line, and specialized testing facilities.
How we engineer components to ensure movement integrity and surface perfection.
Creating watch crowns, winding stems (like those for the 7750, 7751, NH35, and NH36), and precision adapters requires precise machining. We use hardened titanium alloys and 316L stainless steel, along with specialized heat treatment, to increase shear resistance and wear life. This ensures that the components do not bind inside the movement mainplates.
| Component Group | Material Options | Dimensional Tolerance | Surface Treatment / Hardness | Primary Movement Compatibility |
|---|---|---|---|---|
| Screw-In Watch Crowns | Titanium (Gr5), 316L Stainless Steel, 18K Gold, Platinum | ±0.005 mm | Polished, PVD, Diamond-cut, Vickers Hardness > 220 HV | NH35, NH36, ETA 2824, R LX Calibers |
| Winding Stems | Hardened Carbon Steel, Tempered Stainless Steel | ±0.003 mm | Micro-polished thread, specialized stem lubrication plating | ETA 7750, 7751, Citizen 8200, Miyota 8215 |
| Smartwatch Band Adapters | Alloy Steel, Solid 316L, Aero-grade Aluminum | ±0.01 mm | Sandblasted, Anodized, Brushed, Mirror Polish | Apple Watch 38/40/41/44/45mm, Custom Lug Fittings |
| Hands & Dial Elements | Brass, Bronze, Lapis Lazuli/Stone, Gemstones | ±0.008 mm | Diamond mirror chamfering, Swiss Super-LumiNova application | Universal center shafts, custom movement pinions |
| Spring Bars & Link Pins | AISI 304, AISI 316L Stainless Steel | ±0.02 mm | Passivated rust protection, double-flanged end shoulders | Standard lug sizes (8mm to 25mm width) |
From mass assembly plants to luxury boutique modification houses
For factory assembly operations, precision-aligned screwdrivers, automatic oilers, and calibrated winding stem cutters are essential to maintain fast cycle times. We offer custom ODM fixtures that integrate with automated robotic assembly hands to increase efficiency and minimize production defects.
Schools and training facilities require durable, long-lasting tools. Ciso Tool designs ergonomic workbench kits. These kits feature high-strength alloy tips and secure gripping points. They prevent slippage when students work on delicate mainspring barrels or adjust regulator sweeps.
Independent modding brands use our custom titanium and stone-set hands to build bespoke timepieces. By working with Ciso, designers can bypass standard wholesale catalogs. We machine custom components based on 3D CAD models, with production quantities starting from small batches.
Adhering to strict international standards for metallurgy and manufacturing consistency.
At Dongguan Ciso Tool Co., Ltd., we maintain quality control protocols at every stage of production. From raw material receipt to final vacuum packaging, all components and tools are carefully monitored. Our products are exported to North America, the European Union, Switzerland, and Japan. We strictly follow local trade regulations to ensure smooth delivery and customs clearance.
Our strategic expansion plans for production capacity and precision capabilities from 2024 to 2026
Integrating advanced multi-axis CNC machines to achieve a part tolerance threshold of ±0.002mm. This will support next-generation luxury movements.
Expanding the quick-prototype division for wearable device components. This will allow watch micro-brands to launch custom adapters in under two weeks.
Building a new 5,000 square meter Class 10,000 cleanroom. This facility will be dedicated to assembling dials, hands, and movements in a dust-free environment.
Technical support, ordering processes, and material specifications for procurement managers.
Engineered to support repair centers and horological workshops worldwide.
