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GB/T 307.3-2017: Rolling bearings - General technical regulations Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 307.3: Historical versions
Similar standardsGB/T 307.3-2017: Rolling bearings - General technical regulations---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT307.3-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 21.100.20 J 11 Replacing GB/T 307.3-2005 Rolling bearings - General technical regulations Issued on: MAY 12, 2017 Implemented on: DECEMBER 1, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. 3. No action is required - Full-copy of this standard will be automatically & immediately delivered to your EMAIL address in 0~60 minutes. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 8 4 Symbols... 8 5 Bearings ... 8 6 Bearing parts ... 13 7 Bearing accessories ... 13 8 Bearing application ... 14ForewordGB/T 307 Rolling bearings consists of the following four parts. - GB/T 307.1-2005, Rolling bearings - Radial bearings - Tolerances; - GB/T 307.2-2005, Rolling bearings - Measuring and gauging principles and methods; - GB/T 307.3-2017, Rolling bearings - General technical regulations; - GB/T 307.4-2012, Rolling bearings - Tolerances - Part 4. Tolerances for thrust bearings. This Part if the third part of GB/T 307. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 307.3-2005 Rolling bearings - General technical regulations. Compared with GB/T 307.3-2005, the main technical changes in this Part are. - modified the level, number and name of some reference standards (see Clause 2 of this Edition, Clause 2 of Edition 2005); - subdivided the surface roughness value for nominal diameter of 80mm ~ 500mm and modified some surface roughness values (see Table 1 of this Edition; Table 1 of Edition 2005); - added the clearances of four-point-contact ball bearings and double, four-row tapered roller bearings as well as measurement methods (see 5.6, 5.16.3 of this Edition); - added the sealing, cleanliness and appearance quality requirements of bearing (see 5.11~5.13 of this Edition); - added the calculation method for rated thermal speed of bearing (see 5.15.3 of this Edition); - added the measurement method for bearing surface roughness (see 5.16.4 of this Edition); - added the bearing cleanliness, inspection method for appearance quality as well as test and evaluation of service life (see 5.16.8~5.16.10 of this Edition); - added the rolling body (ceramic ball, tapered roller), cage, seal and dust cover requirements (see 6.1~6.3 of this Edition); Rolling bearings - General technical regulations1 ScopeThis Part of GB/T 307 specifies the general technical regulations for rolling bearings. This Part is applicable to rolling bearings of general purpose. For special-purpose bearings, additional technical conditions may be formulated.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 271, Rolling bearings - Classification GB/T 272, Rolling bearing - Identification code GB/T 273.1, Rolling bearings - Tapered roller bearing - Plan of boundary dimensions GB/T 273.2, Rolling bearings - Thrust bearings - Boundary dimensions, general plan GB/T 273.3, Rolling bearings - Boundary dimensions, general plan - Part 3. Radial bearings GB/T 274, Rolling bearings - Chamfer dimension - Maximum values GB/T 275, Rolling bearings - Fits GB/T 305, Rolling bearings - Snap ring groove and snap ring on outer ring - Dimensions and tolerances GB/T 307.1, Rolling bearings - Radial bearings - Tolerances GB/T 307.2, Rolling bearings - Measuring and gauging principles and methods GB/T 307.4, Rolling bearings - Tolerances - Part 4. Tolerances for thrust bearings GB/T 308.1, Rolling bearings - Balls - Part 1. Steel balls GB/T 308.2, Rolling bearings - Balls - Part 2. Ceramic balls GB/T 309, Rolling bearings - Needle rollers GB/T 4604.1, Rolling bearings - Internal clearance - Part 1. Radial internal clearance for radial bearings GB/T 4604.2, Rolling bearings - Internal clearance - Part 2. Axial internal clearance for four-point-contact ball bearings GB/T 4661, Rolling bearings - Cylindrical rollers GB/T 4662, Rolling bearings - Static load ratings GB/T 5868, Rolling bearings - Mounting dimensions GB/T 6391, Rolling bearings - Dynamic load ratings and rating life GB/T 6930, Rolling bearings - Vocabulary GB/T 7811, Rolling bearings - Symbols for physical quantities GB/T 7813, Rolling bearings - Split type plummer block housings - Boundary dimensions GB/T 8597, Rolling bearings - Rust proof packaging GB/T 9160.1, Rolling bearings - Accessories - Part 1. Adapter sleeve assemblies and withdrawal sleeves GB/T 9160.2, Rolling bearings - Accessories - Part 2. Locknuts and locking devices GB/T 18254, High-carbon chromium bearing steel GB/T 24605, Rolling bearings - Marking for products GB/T 24607, Rolling bearings - Test and assessment for life and reliability GB/T 24608, Inspection rules for rolling bearings and commercial parts GB/T 24609, Rolling bearings - Thermal speed rating - Calculation and coefficients GB/T 24610.2, Rolling bearings - Measuring methods for vibration - Part 2. Radial ball bearings with cylindrical bore and outside surface GB/T 24610.3, Rolling bearings - Measuring methods for vibration - Part 3. Radial spherical and tapered roller bearings with cylindrical bore and outside surface GB/T 24610.4, Bearings - Measuring methods for vibration - Part 4. Radial cylindrical roller bearings with cylindrical bore and outside surface GB/T 24611, Rolling bearings - Damage and failures - Terms, characteristics and causes GB/T 25767, Rolling bearings - Tapered rollers GB/T 25769, Rolling bearings - Measuring methods for radial internal clearance GB/T 28268, Rolling bearings - Specifications of pressed cages GB/T 32323, Rolling bearings - Measuring methods for axial internal clearance of four-point-contact ball bearings GB/T 32325, Rolling bearings - Specifications for vibration (velocity) of deep groove ball bearings GB/T 32333, Rolling bearings - Measuring methods and specifications for vibration (acceleration) JB/T 1255, Rolling Bearings - Parts made from high-carbon chromium bearing steels - Specifications for heat treatment JB/T 6639, Rolling bearing parts - Skeleton acrylonitrile-buta-diene copolymers seal - Specifications JB/T 6641, Rolling bearings - Residual magnetism and its assessment method JB/T 7048, Rolling bearing parts - plastic cage-specifications JB/T 7050, Rolling bearings - Assessment methods for cleanliness JB/T 7051, Rolling bearing parts - Methods for the measurement and assessment of surface roughness JB/T 7752, Rolling bearings - Sealed deep groove ball bearings - Specifications JB/T 8236, Rolling bearings - Internal clearances and adjusting methods for double-row and four-row tapered roller bearings JB/T 8874, Rolling bearings - Split type plummer block housings - Specifications JB/T 8922, Rolling bearings - Specifications for vibration(velocity)of cylindrical roller bearings JB/T 10236, Rolling bearings - Specifications of vibration (velocity) for tapered roller bearings -Specifications JB/T 10237, Rolling bearings - Specifications of vibration (acceleration) for tapered roller bearings JB/T 10239, Rolling bearings - Specifications of curled shield for deep groove ball bearings JB/T 11841, Rolling bearing parts - Metal solid cages - Specifications3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 6930 apply.4 SymbolsThe symbols provided in GB/T 7811 apply to this document.5 Bearings5.1 Classification The classification for bearings shall comply with the provisions of GB/T 271. 5.2 Code The code for bearings shall comply with the provisions of GB/T 272. 5.3 Dimensions The bearing dimensions shall comply with the provisions of GB/T 273.1, GB/T 273.2, GB/T 273.3. 5.4 Tolerance grade and tolerance The bearing shall be graded according to size tolerance and rotation accuracy. The tolerance grades are arranged in descending order. Its tolerance shall comply with the provisions of GB/T 307.1, GB/T 307.4. Radial bearing (except tapered roller bearing) is divided into five grades. ordinary, 6, 5, 4, 2. 5.14 Interchangeability 5.14.1 For separate angular contact ball bearings (S70000 type) of ordinary grade tolerance, tapered roller bearings of ordinary grade, 6X grade tolerances, their subparts shall be interchangeable. 5.14.2 For cylindrical roller bearings of ordinary grade tolerance, needle roller bearings with inner and outer rings and cage, when user has requirements for interchangeability, it shall be submitted by interchange. 5.15 Rated load... ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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