Watch parts

The movement is the heart of the watch. You must specify the caliber type (Mechanical, Automatic, or Quartz) and verify the frequency (e.g., 21,600 or 28,800 vph) for accuracy. Ensure compatibility with the hand-setting dimensions and check the power reserve duration (typically 38-42 hours for standard automatics). For high-end builds, prioritize movements with hacking and hand-winding functions.

For cases, 316L Stainless Steel is the industry standard for its corrosion resistance and hypoallergenic properties. When selecting crystals, Sapphire Crystal is preferred for luxury markets due to its 9 Mohs hardness rating, while Mineral Glass or K1 crystals are cost-effective for fashion watches. Always request a water resistance test report (ATM/BAR rating) to ensure the case seals meet your depth requirements.

Products must adhere to REACH and RoHS regulations to ensure they are free from hazardous substances like lead, cadmium, and nickel, which is critical for skin-contact items. For the US market, ensure compliance with California Proposition 65. If sourcing luminous parts, verify that the Lume material (e.g., Super-LumiNova) is non-radioactive and meets safety standards.

Request technical drawings with tolerances within ±0.01mm to ±0.05mm. For dials, inspect the printing quality (pad printing or applied indices) under 10x magnification to check for alignment. For hands, ensure the hole diameters match the movement pinion sizes exactly to prevent slipping or friction issues.

The primary risks include intellectual property (IP) infringement and batch inconsistency. Avoid parts that mimic protected designs or logos to prevent customs seizures. To mitigate quality risks, use third-party inspection services to conduct a Pre-Shipment Inspection (PSI) focusing on finish quality and movement timing.

Start by requesting a paid sample to establish a quality benchmark. Negotiate based on tiered pricing; for example, a 15-20% discount is often achievable when moving from 100 units to 1,000 units. Discuss payment terms such as a 30% deposit and 70% balance after inspection to maintain leverage.

Watch parts are highly sensitive to magnetism and moisture. Ensure the supplier uses anti-magnetic packaging and vacuum-sealed ESD bags for movements. For crystals and dials, insist on individual shock-proof blister packs. For international shipping, Air Freight (DHL/FedEx/UPS) is recommended over sea freight to minimize transit time and exposure to harsh environments.

Always conduct transactions through secure payment channels provided by reputable platforms like Made-in-China.com. Look for Audited Suppliers who have undergone on-site verification by independent agencies like SGS or Bureau Veritas. This ensures the supplier has the manufacturing capacity and legal standing they claim.