Answers to common questions about shock absorber bearing sourcing, OEM/ODM manufacturing, quality control, shipping, and more. Everything B2B buyers need to know about partnering with Chilong.
Our shock absorber bearings are manufactured from high-quality GCr15 bearing steel (equivalent to SAE52100), heat-treated to achieve optimal hardness and wear resistance. We maintain P5 precision grade tolerances and apply specialized surface treatments such as black oxidation or phosphate coating for corrosion resistance. Bearing cages are available in steel or engineering-grade nylon depending on application requirements.
Yes, Ningbo Chilong Bearing Technology Co., Ltd. has been IATF 16949:2016 certified since 2015. This certification reflects our commitment to the rigorous automotive quality management standards required by global OEMs. We also maintain ISO 9001:2015 certification. Our quality management system covers all stages from raw material incoming inspection through production, final testing, and shipping, ensuring consistent product quality and traceability.
Under normal operating conditions, our shock absorber bearings have a typical service life exceeding 100,000 km (60,000+ miles). Actual lifespan depends on factors including vehicle type, road conditions, load, and maintenance. Our bearings undergo rigorous fatigue testing and durability validation to ensure they meet or exceed OE specifications. We provide detailed technical documentation including expected L10 life ratings upon request.
Absolutely. We provide full OEM and ODM capabilities for shock absorber bearings, top mounts, dust covers, bump stops, and bushings. Our engineering team can work from your drawings, samples, or performance specifications to develop custom solutions. We support modifications to dimensions, materials (bearing steel, rubber compounds, PU), surface treatments, sealing configurations, and packaging to meet your exact requirements.
Our MOQ is flexible and depends on product complexity, manufacturing process, and material requirements. For standard catalog products, MOQ typically ranges from 500 to 2,000 pieces per model. For custom OEM/ODM projects, MOQ is discussed on a case-by-case basis considering tooling investment, material minimums, and production setup. We welcome startups and small-volume buyers looking to test the market.
Yes, we specialize in custom manufacturing per customer drawings, CAD files, or physical samples. Our engineering team supports 2D and 3D CAD review (SolidWorks, AutoCAD, Pro/E) and can provide design-for-manufacturing feedback to optimize your parts for cost and quality. We handle tooling, prototyping, testing, and mass production entirely in-house, ensuring full control over quality and timelines.
Sample lead time is typically 7–15 working days depending on complexity and whether new tooling is required. For production orders, typical lead time is 25–45 working days after sample approval and order confirmation. Rush orders can be arranged for urgent requirements. We also maintain buffer stock for many standard models and popular sizes to significantly reduce lead times.
Our quality assurance process follows automotive industry best practices. We implement Production Part Approval Process (PPAP) at Level 3, including dimensional reports, material certifications, and functional test results. First Article Inspection (FAI) is conducted on initial production runs. During mass production, we perform 100% critical dimension inspection, process capability studies (CpK), and random functional testing. Each batch includes a Certificate of Conformance with shipment.
We offer three primary shipping methods optimized for different order sizes: Sea freight (FCL or LCL) for large-volume orders — most economical with transit of 15–35 days; Air freight for medium-volume or urgent orders — faster at 3–7 days; Express courier (DHL, FedEx, UPS, TNT) for samples and small orders — door-to-door service in 3–7 days. We can arrange delivery on FOB, CIF, CFR, DDP, or EXW terms as per your preference.
Our standard payment terms are 30% deposit by T/T (Telegraphic Transfer) before production, with the 70% balance payment before shipment. For established long-term partners, we can discuss L/C (Letter of Credit) at sight. We also accept Western Union and PayPal for smaller transactions. Specific payment terms for custom/OEM projects are negotiated on a per-order basis to accommodate your requirements.
Sample policy is evaluated per project and situation. For standard catalog products, we typically offer samples at cost with the sample charge refundable against your first production order. For custom OEM/ODM samples, pricing depends on tooling and development effort. We encourage serious buyers to discuss their requirements with our sales team — we work hard to find the most suitable arrangement for your evaluation needs.
Absolutely — we warmly welcome factory visits from prospective clients. Our facility is located in the Binhai Economic Development Zone, Cixi City, Zhejiang Province, approximately 2 hours from Shanghai and 1.5 hours from Ningbo. During a visit, you can tour our 5,000m² production facility, meet our engineering and QC teams, review quality control processes, and discuss your project requirements in person. Please contact us to arrange an appointment.
Yes, we provide detailed 2D engineering drawings (PDF and DWG formats) and 3D models (STEP/IGES) for our standard products upon request. For custom OEM projects, we share engineering drawings for your review and approval before proceeding with tooling and production. All drawings include critical dimensions, tolerances, material specifications, surface finish requirements, and quality control parameters.
Yes, our experienced engineering team can assist with product design, reverse engineering, and development from concept through to mass production. We have in-house capabilities for CAD modeling, FEA analysis, material selection guidance, prototyping (3D printing and CNC machining), mold/tooling design, and comprehensive testing protocol development. We have helped numerous clients bring innovative shock absorber component designs to market efficiently.
To provide an accurate and competitive quotation, please share the following information: Product specifications or reference part numbers, target annual volume and per-order quantity, technical drawings or physical samples (if available), material requirements or preferences, and any special requirements (packaging, labeling, testing certifications). The more detail you provide upfront, the more accurate your quote will be. Our sales team typically responds within 24 hours.
Our team is ready to help with your specific requirements. Get in touch for a personalized consultation and quotation.
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