Ciso Tool Ciso Tool

Top 10 Watch Restoration Manufacturer & Factory

Precision Engineering, Micro-Mechanics & Global OEM/ODM Component Manufacturing Solutions

Leading the Vanguard of Haute Horlogerie Component Engineering

How Dongguan Ciso Tool Co., Ltd. Bridges the Gap Between Heritage Craftsmanship and Modern Aerospace-Grade Precision Manufacturing.

In the global luxury watchmaking ecosystem, restoration and modifications require absolute precision, metallurgical authenticity, and micro-mechanical engineering excellence. Founded in 2006, Dongguan Ciso Tool Co., Ltd. has evolved from an early specialized tooling manufacturer into a global powerhouse in the research, development, and mass-fabrication of mid-to-high-end watch components. Today, we stand as a premier solution provider for global watch brands, restoration houses, and independent customizers demanding uncompromised component accuracy.

Operating an expansive, state-of-the-art manufacturing campus spanning over 20,000 square meters, Ciso employs a highly skilled workforce exceeding 500 professionals. At the core of our technical capabilities lies a specialized R&D department containing over 60 mechanical engineers and materials scientists. This extensive engineering infrastructure allows us to reverse-engineer vintage dimensions with micron-level tolerances, develop proprietary material blends (such as stable colored ceramics and structural titanium), and support the global watchmaking supply chain with complete OEM and ODM services.

2006
Established Year
20K+ ㎡
Production Area
500+
Skilled Operators
60+
R&D Engineers

Trends and Macro Solutions in Global Watch Restoration

Aligning B2B procurement pipelines with contemporary shifts in collector demand, sustainability, and material technologies.

1. Material Evolution & Durability

Traditional aluminum watch inserts are yielding to engineering ceramics (Zirconium Dioxide) and ultra-hard Sapphire crystals. Modern restoration relies on manufacturing processes capable of sintering, diamond-machining, and anti-reflective sputtering to match modern luxury standards.

2. Global Sourcing Consistency

B2B watch companies require batch-to-batch consistency. Fluctuations in mechanical hardness or plating thickness can ruin assembly lines. Ciso implements rigorous metallurgical quality gates to guarantee identical material behavior in every batch of custom watch parts.

3. Complete ODM Solutions

Today's restorers and brands demand single-source suppliers capable of managing 3D CAD modeling, multi-axis CNC milling, metal stamping, diamond polishing, and luminous filling (Super-LumiNova) under one roof, reducing lead times and supply chain overheads.

Factory Workfloor and Industrial Production Machinery

Witness our internal production workflow. We integrate top-tier equipment to achieve micro-machining and rigorous quality control.

Assembling Line
Micro-Component Assembling Floor
Precision Assembly
Cleanroom Watch Case Assembly
Machining Department
CNC Structural Component Machining
Movement Assembly
Precision Movement Integration & Calibration
Testing Department
Water Resistance & Pressure Testing Labs
Multi-station Precision Milling
Multi-station Precision Milling Operations
Multi-station Precision Drilling
Multi-station Precision Drilling Apparatus
Multi-station Precision Tapping
Multi-station Precision Tapping Machine
Medium Wire Precision Cutting
Medium Wire EDM Precision Cutting Machine
CAM Automatic Lathe Department
CAM Automatic Lathe & High-Volume Turning Department

Technological Roadmap: The Future of Horological Remanufacturing

Pioneering AI-integrated optical measurement and zero-tolerance materials science for the next generation of timepieces.

At Ciso, we approach watch restoration through the lens of continuous modernization. Our engineers are presently deploying a multi-phase technological roadmap designed to meet the rising complexities of both historical timepiece conservation and modern aftermarket customizations:

Phase 1: Advanced Additive Manufacturing & Laser Cladding

In vintage watch repair, recreating case components or lugs without altering the core alloy composition is critical. We are introducing sub-micron metal laser cladding systems. This allows our craftsmen to reconstruct microscopic, eroded sections of rare watch cases with matching 18K gold, 316L, or 904L structural alloys, preserving historical authenticity while re-establishing modern structural integrity.

Phase 2: High-Purity Ceramic Colors & Structural Carbon Composites

Traditional ceramic bezels are limited in their spectrum due to pigments degrading under extreme sintering temperatures (above 1400°C). Our R&D team is developing low-temperature ceramic reaction-bonding techniques to create rich, durable colors (including deep emerald, midnight blue, and bicolor ceramics) that exhibit Vickers hardness levels exceeding 1500 Hv.

Phase 3: Automated Optical Quality Inspection (AOI)

Integrating AI-assisted vision systems to check tolerances. Using coordinate measuring machine (CMM) systems integrated with artificial intelligence, we automatically identify structural variances in microscopic items—such as the teeth of winding stems or the hand clearance heights—down to +/- 2 micrometers.

Compliance, Intellectual Property & Global Logistical Guarantees

Ensuring seamless international distribution through compliance, certificates, and secure supply chain protocols.

Procuring watch parts from overseas factories can present risks related to regulatory compliance, chemical safety, and intellectual property. Ciso mitigates these challenges through transparent, world-class operational standards:

  • Material Certification: All raw components, including 316L/904L stainless steels, Titanium alloys, and rubber straps, undergo metallurgical chemical analysis. We provide material certificates verifying compliance with EU REACH and RoHS regulations.
  • Intellectual Property Security: When manufacturing customized ODM parts, we establish legal non-disclosure agreements (NDAs) to shield custom dial designs, branded case engravings, and specialized mechanical improvements. Your structural assets remain fully protected.
  • Quality Management System: Our facility is fully certified under ISO 9001:2015. Every manufacturing stage—from CAM lathe turning to final water pressure validation—is documented to ensure complete traceability.
  • Global Logistics & Customs Clearance: Our export team is versed in processing horological trade codes (HS Codes), ensuring that import tariffs are properly handled and shipping routes are secured against delays.

Frequently Asked Questions

Technical answers to critical procurement questions regarding watch restoration, material selections, and factory capacities.

What tolerances can your factory maintain for movement components like winding stems?
For critical moving parts such as winding stems, pinion shafts, and balance pivots, we utilize computerized Swiss-type CAM automatic lathes and medium wire precision EDM cutters. This allows us to hold critical dimensional tolerances to within +/- 0.005mm. This guarantees drop-in compatibility with standard movements like the Seiko NH35/NH36, Citizen-Miyota calibers, and ETA movements.
How does Ciso manufacture ceramic watch bezels?
Our ceramic bezels are produced from ultra-fine Zirconium Dioxide (ZrO2) powder mixed with organic binders, compressed under high pressure, and sintered at temperatures exceeding 1400°C. This causes the compound to shrink and densify. The blank ring is then ground to size using diamond-tipped CNC tooling. Finally, the numerals are laser-engraved and plated with platinum or gold via physical vapor deposition (PVD).
Can you manufacture customized parts from exotic metals like Titanium or 18k Solid Gold?
Yes. Our processing lines are equipped to handle diverse materials. We routinely process Grade 5 Titanium (Ti-6Al-4V) for lightweight, high-strength cases; 316L/904L stainless steel for marine resistance; and precious metals including 18k Solid Gold (Yellow, Rose, White) and Platinum for high-end jewelry watch modifications and vintage case restorations.
What is your minimum order quantity (MOQ) for OEM/ODM watch parts?
For standardized components (like generic winding stems or aftermarket mod crowns), our MOQ is flexible. For complex customized projects requiring custom molding, extrusion, or dedicated CNC tooling setup (such as sapphire crystals, custom-milled cases, or unique dials), our standard MOQ starts from 300 to 500 units per style, depending on design complexity.
How do you verify water resistance for complete watch cases?
We use a two-step testing protocol. First, every casing is dry-tested using air differential pressure sensors to detect microscopic air leaks without risking water entry. Second, random samples undergo wet pressure tests in specialized chamber equipment up to 30 ATM (equivalent to 300 meters/1000 feet) to verify the physical integrity of the sapphire crystal, case-back gaskets, and crown tubes.