This standard specifies the classification, coding method, structural type, external dimensions, technical requirements, testing methods, inspection rules, markings, and rust proof packaging of precision bearings (hereinafter referred to as bearings) and bearing units for industrial robot RV reducers. This standard is applicable to the production, inspection, and acceptance of bearings and bearing units. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 70.1 Hexagon socket cylindrical head screws GB/T 272 Rolling bearings Nomenclature methods GB/T 307.1 Rolling bearings Radial bearing tolerances GB/T 307.2 Principles and methods for measurement and inspection of rolling bearings GB/T 307.3 General technical rules for rolling bearings GB/T 308.1 Rolling bearing balls Part 1: Steel balls GB/T 309 Rolling bearings Needle rollers GB/T 699 High quality carbon structural steel GB/T 4604.1 Rolling bearings Clearance Part 1: Radial clearance of radial bearings GB/T 4661 Rolling bearings Cylindrical roller G B/T 6930 Rolling bearings Vocabulary GB/T 7811 Rolling bearings Parameter symbols GB/T 8597 Rolling bearings Rust proof packaging GB/T18254 High carbon chromium bearing steel GB/T 24605 Rolling bearings Product markings GB/T 24608 Rolling bearings and their commercial parts Inspection rules GB/T 25767 Rolling bearings and tapered rollers GB/T 25769 Measurement methods for radial clearance of rolling bearings GB/T 28268 Technical conditions for rolling bearings stamping cages GB/T 32562 Measurement methods for friction torque of rolling bearings GB/T 34891 Technical Conditions for Heat Treatment of High Carbon Chromium Bearing Steel Parts in Rolling Bearings JB/T 3016 Technical Conditions for Rolling Bearing Packaging Boxes JB/T 6641 Technical Conditions for Residual Magnetism and Evaluation of Rolling Bearings JB/T 7048 Technical Conditions for Plastic Cages in Rolling Bearing Engineering JB/T 7051 Measurement and Evaluation of Surface Roughness of Rolling Bearing Parts JB/T 9201 Induction Quenching and Tempering of Steel Parts JB/T 9207 Heat Treatment of Steel Parts in an Absorbing Atmosphere
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China