Ciso Tool
Ciso Tool
Explore our core engineering catalog including movement cylinders, luminous watch hands, quick-release spring bars, and sapphire optical windows manufactured to sub-micron tolerances.
A Technical Whitepaper on Advanced Micro-Machining, Supply Chain Integration, and Material Metallurgy for Global Watchmakers
In the realm of high-precision horology and micro-mechanical engineering, the watch cylinder (incorporating winding stem tubes, spring bar cylinders, micro-sleeves, case pipe bushings, and movement positioning cylinders) serves as a critical structural and functional component. As global micro-manufacturing demands sub-micron tolerances, seamless waterproofing, and high wear resistance, China has emerged as the global epicenter for precision micro-tubing and component fabrication.
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.
Understanding the micro-machining science, alloy selections, and surface engineering behind high-durability watch cylinders and micro-tubular sleeves.
Utilizing multi-axis Swiss CAM automatic lathes and micro-wire cutting equipment, our watch cylinders achieve internal and external concentricity tolerances down to ±0.001mm, eliminating stem friction and securing IP68/10ATM waterproof seal integrity.
We process medical-grade SUS316L, non-magnetic SUS304 stainless steel, Grade 5 Titanium (Ti-6Al-4V), high-hardness CuBe (Beryllium Copper), and precious 18K gold/platinum sleeves tailored for high-end luxury mechanical movements.
Internal bore surfaces undergo ultrasonic micro-polishing and DLC (Diamond-Like Carbon) or PVD vacuum coating to ensure low friction coefficients (Ra < 0.1µm), extending movement winding stem lifespan and preventing seal degradation.
| Parameter / Specification | Horological Micro-Cylinder | Winding Stem Tube / Sleeve | Industrial Micro-Sensor Sleeve |
|---|---|---|---|
| Outer Diameter Range | 0.80mm – 6.00mm | 1.20mm – 4.50mm | 0.50mm – 12.00mm |
| Inner Bore Tolerance | ±0.001mm – ±0.003mm | ±0.002mm | ±0.0015mm |
| Material Options | SUS316L / SUS304 / Titanium Gr5 | CuBe / 316L / 18K Gold | SUS316L / Sapphire Glass / Ceramic |
| Surface Roughness (Ra) | Ra 0.08 µm – Ra 0.15 µm | Ra 0.10 µm | Ra 0.05 µm (Optical Polished) |
| Waterproof Rating | 3ATM to 30ATM (300 meters) | up to 50ATM with O-ring groove | IP68 / Hermetic Seal |
Quality First, Integrity Supreme: Operating state-of-the-art CNC, EDM micro-cutting, and multi-station automatic machining centers.
From luxury mechanical timepieces to smart IoT wearables and micro-medical devices, discover where our precision watch cylinders excel.
Used as winding stem guide tubes, gear arbor bushings, and crown seals in self-winding caliber modifications (such as ETA 2824, 2836, Seiko NH35/NH36 series). Guarantees smooth crown engagement and long-term oil retention.
Micro-cylinders integrated into smart watch cases serve as protective housings for heart-rate optical windows, waterproof button plungers, and quick-release lug mechanisms compatible with modern smartwatch ecosystems.
Beyond traditional horology, our high-precision SUS316L and Titanium micro-tubes are deployed in micro-fluidic control valves, medical catheter pins, and optical sensor enclosures requiring anti-corrosive biocompatibility.
Why Leading European & Global Watch Brands Partner with Dongguan Ciso Tool Co., Ltd.
Located in Dongguan, the hardware manufacturing heart of China, we benefit from complete upstream raw material supply (certified stainless steel, titanium, sapphire) and downstream surface coating (PVD, IP-plating, electro-polishing) within a 30-minute radius.
Compared to traditional European micro-machining hubs, Ciso provides 100% equivalent precision tolerances (±0.001mm) at 40%-60% reduced unit costs, allowing brand owners to maximize gross margin without sacrificing horological standards.
With over 60 dedicated R&D engineers and 500 staff, we transition seamlessly from rapid 5-day CAD prototype sampling to monthly high-volume shipments exceeding 2 million micro-cylinder units.
Pioneering the Next Generation of Horological Micro-Manufacturing
Integration of magnetic abrasive polishing (MAP) to reduce internal cylinder bore wall roughness to Ra < 0.03µm, virtually eliminating mechanical friction for high-frequency automatic movements.
Full implementation of 100% online 3D laser scanning vision systems across all CAM automatic lathes, guaranteeing zero-defect export shipments for high-volume OEM orders.
Combining metallic watch cylinders with ultra-hard ceramic linings and sapphire crystal windows to create corrosion-proof components for extreme deep-sea diving instruments.
Rigorous quality protocols ensuring every component meets international horology standards.
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.
Comprehensive technical answers to common B2B procurement and engineering questions.
Discover our comprehensive range of movement gears, quick-release spring bars, case backs, and lug adapters.
