Ciso Tool
Ciso Tool
Explore our high-end watch hands, custom rings, structural components, and custom machinery engineered to exact tolerances.
A premier global micro-manufacturing partner for horological casing, dials, and components.
Founded in 2006, Dongguan Ciso Tool Co., Ltd. has established itself as an authoritative leader in the engineering, design, and mass-scale production of mid-to-high-end watch components. Utilizing custom production architectures, Ciso has grown from its initial precision tool-making origins into an integrated horological powerhouse. Today, the corporation provides structured OEM and ODM development workflows to support tier-1 watch brands, independent horology startups, and industrial equipment companies globally.
Operating a manufacturing campus exceeding 20,000 square meters in Dongguan—the world's capital of precision micro-machining—Ciso leverages a workforce of over 500 skilled specialists. A key differentiator in the enterprise is the structured 60-strong research and development (R&D) department, comprising metallurgists, mechanical engineers, and digital design specialists who transform raw technical blueprints into premium physical timepieces.
Why Southern China represents the world's most robust watchmaking and component supply ecosystem.
Our facility utilizes Swiss-type automatic lathes and multi-axis CNC machining stations. This allows us to achieve tolerances within ±0.005mm, which is vital for component assembly, dial alignments, and case-back threading.
Dongguan offers unmatched supply integration. From raw materials (316L, Grade 5 Titanium, 18K Gold) to specialized surface treatments (PVD, CVD, galvanic plating) and packaging, every step is optimized within a 50km radius.
We perform 100% inspections on movement integration fits, Swiss Super-LumiNova luminescence alignment, and seal security. This reduces defective output to fewer than 150 parts per million (PPM).
In addition to horological components, Ciso Tool's manufacturing framework extends to allied micro-mechanics. The machinery that mills thin steel structures for watch crowns and dials is equally capable of fabricating complex industrial seals and engine gaskets (such as Cylinder Head and Oil Pan Gaskets). This demonstrates the transferability of high-precision tolerances across aerospace, medical, and automotive sectors.
An inside look at our machinery, assembly, and validation procedures.
In the luxury and tool-watch sectors, procurement officers look beyond basic catalog items. They seek engineering support to tackle design and mechanical problems, such as matching the coefficients of thermal expansion between sapphire crystals and titanium cases, or ensuring the adhesion of PVD coatings on complex watch geometries.
Modern watch brands face supply challenges when matching aftermarket dials and hands with popular movements (such as the Seiko NH35/NH36, Miyota 9015, or Swiss Sellita SW200). Minor deviations in the hands' bushing heights can cause friction against the dial surface or the underside of the crystal, reducing power reserve and timing accuracy. Ciso designs dials and hands with precise tolerances, ensuring easy installation on these movements.
As brands seek ways to differentiate their products, they increasingly use exotic materials. Dials made from natural Muonionalusta meteorite, Damascus steel, and forged carbon require specialized machining techniques. Traditional punching tools can shatter the crystalline structures of meteorite dials, for example. We use precision wire EDM cutting and chemical etching to preserve these natural patterns while keeping the dial's thickness at 0.4mm.
Readability is key for tool and dive watches. We apply Swiss Super-LumiNova (C3, BGW9) using precision silk-screening or CNC-applied deep wells. Our multi-layer pad printing processes ensure the luminous paint remains stable and active for years without flaking or yellowing under UV exposure.
Many brands struggle with sourcing fragmentation, buying dials from one supplier, hands from another, and cases from a third. This often leads to assembly issues due to mismatched tolerances. Ciso addresses this with a full vertical ODM solution: we manufacture and inspect the case, dial, hands, and assembly under one roof, ensuring all parts fit correctly.
Our manufacturing facility adheres strictly to RoHS and REACH standards. We use lead-free steel alloys and ensure our electroplating and PVD processes use eco-friendly water recovery systems, helping our clients meet global import regulations.
Answers to common questions regarding watch component engineering, tolerances, and production workflows.
Discover additional components, machinery, and specialized assemblies designed for modern watchmaking.
