China china fan bush price

Selecting the correct material is critical for reducing friction and heat. Sintered Bronze (Oil-impregnated) is the industry standard for household fans due to its self-lubricating properties. For heavy-duty industrial fans, Graphite-filled Bronze or High-Precision Iron-based alloys may be used to handle higher load capacities. Always verify the density and oil content percentage (typically 18-22% by volume) to ensure the bush doesn't seize during continuous operation.

Precision is paramount. You must specify the Inner Diameter (ID), Outer Diameter (OD), and Length with a tolerance of ±0.01mm to ±0.02mm. Additionally, confirm the concentricity to prevent shaft vibration. For high-speed fans, ensure the bush meets ISO 9001 quality standards and has been tested for noise levels (dB), as poor-quality bushes are the primary cause of fan humming.

Prices are primarily driven by the Powder Metallurgy (PM) process. Sintered bronze bushes are more expensive than iron-based ones due to copper market rates. Bulk pricing usually triggers at 5,000 to 10,000 units, where unit costs can drop by 20-40%. Custom shapes (flanged vs. cylindrical) and vacuum oil impregnation treatments will also add a premium to the base price.

Ensure the supplier complies with RoHS (Restriction of Hazardous Substances), as these components are used in consumer electronics. Request a Salt Spray Test report if the fans are intended for humid environments, and a Hardness Test (HB/HRB) to ensure the bush won't wear down the motor shaft prematurely.

Always request a pre-production sample and conduct a third-party lab test for chemical composition. Use platforms like Made-in-China.com to select 'Audited Suppliers' who have undergone on-site factory inspections. This reduces the risk of receiving 'iron-clad' bushes disguised as pure bronze.

Focus on Annual Volume Commitments rather than one-off orders to secure 'Tier 1' pricing. Negotiate payment terms such as 30% deposit and 70% against the Bill of Lading (B/L). Clearly define the Defective Rate (AQL); for precision components like bushes, an AQL of 1.0 or 1.5 is recommended.

Fan bushes are heavy but small. To prevent oxidation during sea freight, insist on VCI (Volatile Corrosion Inhibitor) anti-rust packaging and vacuum-sealed plastic bags. For large volumes, FOB (Free On Board) is preferred to maintain control over shipping costs and local logistics agents.

Utilize Secured Trading Services provided by Made-in-China.com to ensure payments are only released upon confirmation of shipment. Avoid using private wire transfers; always pay to the official corporate bank account listed on the supplier's verified profile.