Ciso Tool
Ciso Tool
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, we have established long-term partnerships with well-known domestic brands and continue to expand our presence in global markets. We are 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.
Precision watch tension springs demand raw materials with high elasticity limits and non-magnetic parameters. We source and process premium 316L & 304 Stainless Steel, CuBe (Beryllium Copper), Carbon Steel, and specialized alloys like Nivaflex to eliminate magnetic deviations in mechanical movements.
To secure the reliability of click, yoke, setting, and main springs, our R&D division subjects each production run to continuous cyclic fatigue testing. Dynamic stresses are simulated over 1,000,000 operations to prevent sudden tension decay or micro-fracture propagation.
Our state-of-the-art wire-forming and stamping centers achieve dimensional tolerances down to ±0.002 mm. Every caliber spring fits perfectly inside its housing cavity, preventing surface friction against the bridges or mainplates of Swiss-grade movements.
| Spring Variant | Primary Material Selection | Dimensional Tolerance Range | Hardness Rating (Vickers) | Common Movement Caliber Fit |
|---|---|---|---|---|
| Yoke / Setting Spring | AISI 301 / 304 Stainless Steel / Carbon Steel | ± 0.005 mm | 420 - 480 HV | NH35, NH36, ETA 2824 |
| Click Spring | Phosphor Bronze / SUS 316L | ± 0.002 mm | 380 - 430 HV | Caliber 3135, Miyota 9015 |
| Tension Spring (Winding) | Nivaflex / High-Yield Carbon Alloy | ± 0.001 mm | 520 - 580 HV | Chronograph 7750, PP324 |
| Balance / Hairspring (Raw) | Elinvar / Silicon (Si) | Sub-micron | Custom Calibrated | Tourbillon & High-Beat Escapements |
Operating in Dongguan, the hardware capital of the world, gives us access to a complete metal supply chain, immediate surface treatment providers, and international shipping lanes through Shenzhen, Guangzhou, and Hong Kong ports.
We employ high-end Japanese automated optical comparators, laser measurement micrometers, and precision balance scales to certify the geometric conformity of every exported batch. Traceable test reports are packaged with every shipment.
With 60+ engineers, we don't just execute blueprints. We optimize spring geometries, suggest alternative high-performance tempers, and assist in structural design modifications to lower movement production costs.
Global procurement requires strict compliance with international chemical and environmental regulations. Dongguan Ciso Tool Co., Ltd. ensures that all manufactured watch components comply with the latest RoHS and REACH directives, guaranteeing lead-free, nickel-release compliant products safe for prolonged skin contact.
We work directly with major testing bodies like SGS and TÜV to provide updated material safety data sheets (MSDS) and chemical composition analyses for all metal components, giving our global clients full confidence during customs clearance and local retail compliance audits.
To support localized application engineering, we provide dedicated engineering support desks for our North American, European, and Japanese accounts. Our technical account managers assist with material optimization, localized design conversions, and local warehouse stocking strategies to buffer against shipping fluctuations.
