Custom spur gears

Buyers must specify the Module (metric) or Diametral Pitch (imperial) to ensure tooth compatibility. Key parameters include the number of teeth, pressure angle (typically 14.5° or 20°), and face width. For high-precision applications, define the AGMA quality level (e.g., AGMA 10-12) or ISO accuracy grades to minimize backlash and noise.

For heavy-duty industrial machinery, C45 steel or alloy steels like 40Cr with induction hardening are preferred for wear resistance. For high-speed, low-noise applications, nylon or POM (polyacetal) may be suitable. If the gears operate in corrosive environments, 304 or 316 stainless steel is essential to prevent premature failure.

To enhance surface hardness while maintaining core toughness, specify carburizing and quenching or nitriding. Ensure the supplier provides a hardness test report (HRC/HV). Properly heat-treated gears can extend service life by 300% compared to untreated components.

Suppliers should ideally hold ISO 9001:2015 for general quality management. For automotive applications, IATF 16949 is required. Ensure the raw materials comply with RoHS and REACH standards, especially if exporting to the EU market, to avoid customs clearance issues.

Always request a First Article Inspection (FAI) report and a Pre-Shipment Inspection (PSI). Utilize third-party inspection services to verify gear tooth profile, concentricity, and surface roughness (Ra) before the balance payment is made. On platforms like Made-in-China.com, prioritize Audited Suppliers who have undergone on-site verification.

Focus on Total Cost of Ownership (TCO) rather than just the unit price. Negotiate based on volume breaks (e.g., 500, 1000, 5000 units) and ask for tooling cost amortization over the first few orders. Ensure the contract specifies tolerance deviations and the supplier's liability for defective batches.

Custom gears are heavy and prone to rust. Insist on VCI (Volatile Corrosion Inhibitor) packaging or oil-dipped wrapping. For large volumes, Sea Freight (FOB or CIF) is most economical, but ensure the wooden crates meet ISPM 15 fumigation standards to prevent entry delays at the destination port.

Use Secured Payment services provided by reputable platforms like Made-in-China.com to ensure funds are only released upon confirmation of delivery. Avoid direct wire transfers to unknown accounts and always verify the beneficiary bank name matches the company name on the business license.