Ciso Tool
Ciso Tool
Explore our selection of ultra-precise watch engineering solutions, manufactured in our modern facilities. From micro-machined spring bars to custom bezels, we supply components that meet the rigorous standards of global watchmaking.
In high-end mechanical movements, a watch bushing (or bearing sleeve) is not merely a spacer; it is the cornerstone of mechanical efficiency, directly governing gear alignment, rotational stability, and systemic longevity. These micro-engineered sleeves are deployed to isolate high-torque pivots, minimizing metal-on-metal friction and distributing kinetic loads evenly across the caliber plate.
From synthetic rubies (corundum bushings) to precision beryllium copper (CuBe) and 316L stainless steel sleeves, our components undergo extreme surface finishing (achieving an internal bore roughness of Ra < 0.1 μm). This levels out micro-friction spikes, preventing gear chatter and reducing lateral shaft play. Consequently, the watch maintains its isochronism and delivers a longer power reserve.
Below are the specialized tolerance standards applied in our precision manufacturing lines:
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.
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 facility is equipped with state-of-the-art precision machinery to guarantee that every watch component satisfies standard tolerances and complex dimensional parameters. Below is a tour of our core production and assembly lines.
Precision micro-bushings are structural elements that find application across several demanding watchmaking segments. Understanding these scenarios allows us to design components tailored to the operational stresses of different environments.
High-beat mechanical movements operating at 28,800 vibrations per hour (vph) require synthetic ruby or beryllium-bronze bushings. These minimize axial friction on the escape wheel and balance pivots, ensuring energy transmission remains constant throughout the mainspring's release cycle.
Modern smartwatches featuring physical hands require robust, shock-resistant metallic bushings (usually constructed from SUS316L or titanium). These isolate the delicate stepper motors from kinetic shock during sports and everyday activities, maintaining dial alignment.
Complex movements containing perpetual calendars, chronographs, and tourbillon cages rely on custom-dimensioned bushings. These accommodate fluctuating lateral forces, preventing gear tilt and minimizing wear on multi-layered wheel trains.
Our manufacturing operations in Dongguan, China, leverage the region's concentration of horological engineering expertise. This structural advantage translates into tangible benefits for international watch brands and movement manufacturers.
The Dongguan manufacturing corridor provides direct access to raw materials (including certified Swiss-grade brass, imported synthetic sapphire rods, and high-purity stainless steels) alongside specialized surface treatment providers (vacuum PVD coating, electroplating, and chemical passivation). This geographical consolidation shortens logistics times and eliminates long-distance transit delays.
By grouping operations—from CAM lathe turning and multi-station drilling to automatic deburring and optical inspection—within our 20,000-square-meter facility, we maintain control over the entire production cycle. This integration minimizes lead times, enabling us to go from CAD approvals to production delivery in a fraction of the time required by fragmented operations.
Advanced automation, including multi-station tapping machines and automatic CAM lathes, allows us to achieve cost efficiencies at scale. These savings are passed to our partners without compromising the tolerances of the components.
Furthermore, our R&D team of 60+ professionals specializes in design for manufacturability (DFM). We collaborate with clients during the initial design phases to simplify machining steps, reduce tool wear, and improve yields—lowering unit costs while maintaining the required fit and finish.
The demands on mechanical watches are shifting toward higher magnetic resistance, longer service intervals, and green manufacturing practices. Our R&D department is actively developing materials and manufacturing techniques to meet these trends.
Deploying Diamond-Like Carbon (DLC) coatings inside metallic bushing bores to achieve a coefficient of friction of < 0.05. This technology allows movements to run with minimal lubrication, mitigating the risk of oil coagulation and extending standard maintenance cycles to 8–10 years.
Transitioning our brass and alloy production to lead-free alternatives (such as Eco-Brass and specialized copper-silicon alloys) to align with upcoming RoHS and REACH guidelines, ensuring compliant distribution in European and North American markets.
Integrating micro-3D printing and laser sintering technologies for low-volume, high-complexity watch parts. This process will enable the production of integrated bushing-plate designs that were previously impossible to produce via traditional subtractive milling.
Exporting watch components globally requires adherence to international standards and quality certifications. We provide comprehensive documentation and engineering support to streamline integration into our clients' supply chains.
All raw material batches are shipped with material test reports (MTRs) and mill test certificates, certifying exact chemical composition and mechanical properties. Our watch components comply with RoHS, REACH, and California Proposition 65 requirements.
We accept standard 2D and 3D CAD formats, including STEP, IGES, DXF, DWG, and SolidWorks files. Our engineers review these models to verify dimensional stack-ups and tolerance limits before initiating mass production.
We offer multiple shipping terms including FOB, CIF, and DDP (Delivered Duty Paid), handling all customs clearance and import duties to deliver components directly to our clients' assembly lines in Europe, Asia, and North America.
From custom bezels to specialized mechanical movement spares, we deliver high-performance components designed for luxury and business calibers.
