| Part Identification | 513076 is commonly used as a reference number for an automotive wheel hub bearing or hub-bearing assembly. The reference number should be matched with the vehicle application, mounting design, sensor configuration, and engineering drawing. | Request a technical datasheet, dimensional drawing, application list, and cross-reference information. Do not approve a supplier based only on the reference number because numbering practices may vary between catalogs. | Critical |
| Key Dimensions | Common catalog listings may show approximately 42 mm bore, 82 mm outside diameter, and 45 mm overall width for a 513076-type bearing reference. These values must be treated as preliminary until confirmed against the required drawing. | Measure production samples with calibrated gauges or a coordinate measuring machine. Confirm bore, outside diameter, width, flange geometry, bolt pattern, pilot diameter, and mounting offset. | Critical |
| Vehicle Compatibility | Compatibility depends on the vehicle platform, axle position, generation, brake configuration, wheel speed sensor arrangement, and electronic connector design. | Require vehicle application data, OEM-equivalent dimensions, installation instructions, and a sample fitment test. Verify ABS or wheel-speed sensor output where applicable. | Critical |
| Bearing Type | Confirm whether the product is a complete hub unit, a flanged bearing assembly, or a service bearing. The internal design may include a double-row angular-contact configuration or another application-specific arrangement. | Review the cross-sectional drawing, internal construction, preload specification, sealing arrangement, and installation procedure before placing a production order. | Critical |
| Material Quality | Automotive wheel bearings are generally manufactured from bearing-grade high-carbon chromium steel. Material cleanliness, hardness, heat treatment, and dimensional stability directly affect service life. | Request material certificates, heat-treatment records, hardness reports, metallurgical inspection results, and batch traceability documents. | Critical |
| Manufacturing Standard | Dimensional and running accuracy should be controlled according to applicable bearing tolerances, with customer-specific requirements defined on the drawing. Automotive production should use documented process controls. | Check the supplier's quality manual, inspection standards, control plan, process flow chart, and records for dimensional and functional inspection. | Critical |
| Quality Management | ISO 9001 certification is a useful baseline. IATF 16949 certification is a stronger indicator for suppliers serving automotive original-equipment or automotive-tier customers. | Verify certificate validity, certification scope, issuing body, audit status, corrective-action history, and whether the certificate covers the actual manufacturing site. | Critical |
| Load and Service Life | Selection should consider dynamic load rating, static load rating, calculated bearing life, vehicle weight, axle load, wheel offset, road conditions, and expected operating temperature. | Request load-rating calculations based on ISO 281 principles, static safety calculations, application assumptions, and validation-test results. Avoid relying solely on a generic catalog life value. | Critical |
| Sealing Performance | Effective seals should protect the rolling elements and lubricant from water, dust, salt, and road debris while limiting friction and heat generation. | Review seal material, seal-lip design, grease specification, water-ingress testing, contamination testing, and temperature-resistance data. | Critical |
| Lubrication | The grease should be suitable for automotive wheel-bearing temperature, speed, pressure, water exposure, and long-term storage. The fill quantity must be controlled consistently. | Request grease technical data, compatibility information, filling tolerances, batch records, and evidence of lubricant validation under the intended application conditions. | Important |
| ABS or Speed Sensor | If the assembly includes an integrated sensor or encoder ring, the sensing technology, pole count, connector, signal output, and installation orientation must match the vehicle system. | Check sensor drawings, connector specifications, electrical test results, encoder orientation, air-gap requirements, and vehicle-level diagnostic compatibility. | Critical |
| Noise and Vibration | Low rolling noise, controlled vibration, correct preload, accurate runout, and consistent raceway geometry are essential for driving comfort and durability. | Ask for noise-and-vibration inspection limits, runout measurements, preload data, balancing results where applicable, and end-of-line test records. | Critical |
| Production Equipment | Suitable equipment may include automated turning, grinding, heat-treatment, assembly, grease-filling, sealing, torque-control, and end-of-line inspection systems. | Conduct a factory audit or remote process review. Confirm equipment capacity, preventive-maintenance records, calibration status, and production-line automation level. | Important |
| Process Traceability | Each production batch should be traceable to raw material, heat treatment, machining, assembly, inspection, packaging, and shipment records. | Request sample batch labels, barcode or lot-number procedures, retention periods, nonconformance records, and a traceability demonstration from finished product back to raw material. | Critical |
| Pre-Production Approval | A formal approval package should include dimensional results, material records, performance-test results, process-flow documentation, control plans, and sample inspection reports. | Use an APQP and PPAP-style approval process where appropriate. Define sample quantity, approval criteria, deviation handling, and change-notification requirements in writing. | Critical |
| Testing Capability | Useful tests include dimensional inspection, hardness, metallography, torque, radial runout, axial play, rotational drag, seal performance, endurance, corrosion resistance, and sensor function. | Confirm whether tests are performed in-house or by an independent laboratory. Review equipment calibration, test methods, acceptance limits, and representative test reports. | Critical |
| Minimum Order Quantity | MOQ should be compatible with the buyer's forecast, launch schedule, packaging requirement, and inventory plan. A lower MOQ may reduce initial purchasing risk but can increase unit cost. | Compare trial-order MOQ, regular-production MOQ, tooling charges, sample policy, and price breaks. Make sure sample parts are manufactured using the intended production process. | Important |
| Lead Time | Lead time should be separated into sample development, tooling or fixture preparation, first-article approval, production, inspection, and export handling. | Request a written production schedule with capacity assumptions, holiday planning, raw-material availability, contingency arrangements, and late-delivery procedures. | Important |
| Packaging and Storage | Packaging should prevent impact, corrosion, moisture damage, contamination, and deformation during international transportation and warehouse storage. | Review packaging drawings, anti-rust method, inner and outer carton strength, lot identification, pallet configuration, storage-life guidance, and drop-test requirements. | Important |
| Change Control | Changes to material, heat treatment, seal design, grease, tooling, manufacturing location, sensor components, or critical dimensions can affect interchangeability and service life. | Require advance written notification, customer approval for critical changes, updated samples, revised documents, and complete revalidation when necessary. | Critical |
| Warranty and Claims | A clear warranty policy should define coverage period, operating conditions, evidence requirements, failure analysis, replacement responsibility, and claim-response time. | Compare warranty terms, previous corrective-action examples, return procedures, root-cause-analysis capability, and the supplier's responsibility for verified manufacturing defects. | Important |
| Commercial Evaluation | Total cost should include product price, tooling, inspection, packaging, freight, duties, inventory, warranty exposure, and the cost of possible field failures. | Use a total-cost-of-ownership comparison instead of selecting the lowest quotation. Evaluate at least three technically qualified suppliers using the same specification. | Critical |
| Final Supplier Selection | The preferred supplier should demonstrate verified dimensional compatibility, stable quality, effective traceability, sufficient production capacity, transparent communication, and competitive total cost. | Use a weighted scorecard, for example: technical compatibility 25%, quality system 20%, validation capability 20%, production capacity 15%, delivery performance 10%, and total cost 10%. | Critical |
