Ciso Tool
Ciso Tool
Discover our high-precision custom elements, ranging from classic watch engineering rings to advanced electronic sensor housings and smart wearables.
In premium horology, a watch chapter ring (frequently referred to as the rehaut) is far more than a decorative perimeter. Situated between the sapphire crystal glass and the dial, the chapter ring acts as a structural stabilizer, alignment guide, and visual transition element. For luxury chronographs, diving watches, and advanced technical timepieces, its execution directly influences the aesthetic value and functionality of the watch face.
"A difference of merely 5 microns on a chapter ring's mounting step can cause misalignment of the dial indicators, resulting in visible defects under standard QC loops. Precision tooling is not an option; it is a fundamental requirement." — R&D Director, Ciso Tool Co., Ltd.
We employ aerospace-grade materials including CNC-machined lead-free brass, 316L/904L stainless steel, lightweight aluminum alloys, and high-performance polymers. Every batch undergoes spectroscopic testing to guarantee composition consistency, ensuring complete compliance with REACH and RoHS standards.
From classic sunburst brushing and mirror polishing to advanced Physical Vapor Deposition (PVD) coating, galvanic plating, and high-precision laser-etched scale marks. We ensure our processes produce zero bleed, sharp edges, and zero discoloration under long-term UV exposure.
Our engineers design custom step profiles, tension rings, and positioning tabs tailored to prevent movement-shift. The integration of precision indices guarantees seamless alignment with dial tracks, even under extreme vibration and impact conditions.
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.
Explore our in-house manufacturing lines. By managing all processing phases—from initial wire cutting and multi-axis CNC milling to assembly and rigorous water-resistance testing—we offer exceptional control over dimensional tolerances and aesthetic finishes.
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.
Our quality management workflow follows international standards, implementing 100% optical inspection on critical steps, salt spray corrosion testing, and ultrasonic cleaning stages to guarantee zero surface residue.
Our location in Dongguan, the manufacturing capital of southern China, offers significant supply chain advantages. This allows us to provide international watch brands with cost efficiency, speed, and engineering support.
Within a 10-kilometer radius of our facilities, we access raw material refineries, specialized plating facilities, surface finish houses, and custom logistics providers. This proximity minimizes raw material transport times and boosts manufacturing agility.
Using our specialized tooling workshops, we can prototype custom chapter rings in 7 to 10 days. We iterate engineering parameters rapidly, helping brands complete verification cycles quickly and accelerate market launches.
By combining high-capacity CNC operations with automated production, we control manufacturing costs while maintaining high-end dimensional and aesthetic parameters.
Global logistics require strict adherence to international regulatory systems. Ciso operates under a unified compliance program, ensuring trouble-free import procedures, customs clearance, and environmental certifications for European Union, American, and Asian markets.
Every watch component is certified lead-free, nickel-release compliant (EN 1811:2011), and aligns with RoHS 3 (Directive 2015/863) and REACH (EC 1907/2006). This guarantees safe wearability across global regions.
To support both emerging boutique watch microbrands and established global conglomerates, we structure our ordering systems with tiered MOQ arrangements, supporting low-volume prototyping and massive manufacturing runs.
We provide complete Incoterms coverage (including DDP, FOB, and CIF) backed by accurate customs paperwork, HS Code classification (Chapter 91), and shock-absorbent, anti-static bulk packaging.
The global watch industry is experiencing a convergence. Traditional mechanical horology elements are merging with health sensor hardware and smart ring integrations. A modern watch chapter ring is no longer just a static metal circle; it is adapting to accommodate smart device structures.
For example, smart sensors, heart rate trackers, blood glucose monitors, and NFC aerial tracks are now built into watch chapter rings, smartwatch bezels, and smart band ring inserts. Ciso is at the forefront of this evolution, leveraging CNC milling of non-conductive ceramic, brass, titanium, and FKM elastomeric gaskets to house electronic components without blocking signals.
Horology Trend Insight: Incorporating signal-transparent materials into chapter ring sections allows designers to hide antennas and light-path windows within the dial edge, maintaining the classic look of a mechanical luxury watch.
Different watch typologies require specific technical treatments. Our production lines customize chapter rings for various real-world situations:
Diving watches require water resistance and clear visibility. We use anodized aluminum or ceramic chapter rings with Super-LumiNova coatings, fit with tight elastomeric gaskets to withstand pressures up to 30 ATM.
For fitness and tracking smartwatches, we produce lightweight, CNC-machined titanium rings that house health sensors, ensuring both structural integrity and wearer comfort.
Chronographs demand intricate dial layouts. We provide high-precision brass rings with laser-etched tachymeter and telemetric scales, featuring sharp pad-printed indices for accurate timekeeping.
We provide clear answers to common inquiries from procurement officers, horological designers, and product engineers:
From premium jewelry rings matching watches to highly specialized CNC tools and waterproof smart accessories, explore our diverse manufacturing capabilities.
