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Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 24609-2023: Rolling bearings - Thermal speed rating - Calculation Status: Valid GB/T 24609: Historical versions
Basic dataStandard ID: GB/T 24609-2023 (GB/T24609-2023)Description (Translated English): Rolling bearings - Thermal speed rating - Calculation Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: J11 Classification of International Standard: 21.100.20 Word Count Estimation: 18,168 Date of Issue: 2023-12-28 Date of Implementation: 2024-04-01 Older Standard (superseded by this standard): GB/T 24609-2009 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 24609-2023: Rolling bearings - Thermal speed rating - Calculation---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.ICS 21:100:20 CCSJ11 National Standards of People's Republic of China Replace GB/T 24609-2009 Calculation method for rated thermal speed of rolling bearings Rolingbearings-Thermalspeedrating-Calculation (ISO 15312:2018,IDT) Published on 2023-12-28 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols and Units 2 5 Reference condition 3 5:1 General 3 5:2 Reference conditions for determining frictional heating 3 5:3 Reference conditions for determining heat dissipation 4 6 Calculation method of rated thermal speed 7 Appendix A (Informative) Coefficients f0r and f1r 8 Appendix B (informative) Notes 10 Appendix C (informative) Rated thermal speed of grease lubricated rolling bearings11 Reference 12ForewordThis document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting: This document replaces GB/T 24609-2009 "Calculation Methods and Coefficients of Rated Thermal Speed of Rolling Bearings" and is consistent with GB/T 24609- Compared with:2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Changed the order of some symbols (see Table 1, Table 1 of the:2009 version); b) Changed the format of "Reference Conditions" (see Chapter 5, Chapter 5 of the:2009 edition); c) Move the "Annotation" chapter to the appendix (see Appendix B, Chapter 7 of the:2009 edition); d) Move the contents of the appendix "Rated thermal speed of grease-lubricated rolling bearings" to Appendix C (see Appendix C, Appendix B of the:2009 edition): This document is equivalent to ISO 15312:2018 "Calculation Method for Rated Thermal Speed of Rolling Bearings": Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents: This document is proposed by China Machinery Industry Federation: This document is under the jurisdiction of the National Rolling Bearing Standardization Technical Committee (SAC/TC98): This document was drafted by: Luoyang Bearing Research Institute Co:, Ltd:, Renben Co:, Ltd:, Zhejiang Zhaofeng Mechanical and Electrical Co:, Ltd:, Dalian Metallurgical Bearing Co:, Ltd: The main drafters of this document: Zhao Binhai, Li Feixue, Guo Changjian, Kang Naizheng, Wang Dehui: The previous versions of this document and the documents it replaces are as follows: ---First published as GB/T 24609-2009 in:2009; ---This is the first revision: Calculation method for rated thermal speed of rolling bearings1 ScopeThis document specifies the definition of the rated thermal speed of oil bath lubricated rolling bearings and the calculation principles for determining this parameter: From a tribological point of view See, the parameters determined in this document apply not only to bearings of standard construction of a given series and size, but also to other relevant standard constructions: Structured bearings: For most standard components, the heat of the entire component is generated by the bearings, and the maximum operating speed is determined by the allowable temperature: Due to kinematic effects, the rated thermal speed specified in this document does not apply to thrust ball bearings: Note 1: Appendix A gives the average value of the coefficients f0r and f1r - f0r is the coefficient for calculating the viscous loss of the oil bath lubricated bearing, and f1r is the coefficient for calculating the friction loss of the bearing: coefficient: Note 2: Appendix B gives annotations on the limit criteria: Note 3: Appendix C determines the reference conditions for grease lubrication: The reference conditions can be selected so that the rated thermal speed for grease lubrication is equal to that for oil bath lubrication: Thermal speed:2 Normative reference documentsThe contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document: ISO 76 Rolling Bearing Static Load Ratings (Rolingbearings-Staticloadratings) Note: GB/T 4662-2012 Static load rating of rolling bearings (ISO 76:2006, IDT) ISO 1132-1 Tolerances for rolling bearings Part 1: Terms and definitions (Rolingbearings-Tolerances-Part 1: Note: GB/T 4199-2003 Rolling bearing tolerance definition (ISO 1132-1:2000, MOD) ISO 5593 Rolling Bearings Vocabulary (Rolingbearings-Vocabulary) Note: GB/T 6930-2002 Rolling bearing vocabulary (ISO 5593:1997, IDT) ISO 5753-1 Rolling bearing clearance Part 1: Radial clearance of radial bearings (Rolingbearings-Internalclear- Note: GB/T 4604:1-2012 Rolling bearing clearance Part 1: Radial clearance of radial bearings (ISO 5753-1:2009, IDT) Note: GB/T 7811-2015 Rolling bearing parameter symbols (ISO 15241:2012, IDT)3 Terms and definitionsThe terms and definitions defined in ISO 1132-1 and ISO 5593 and the following apply to this document: The URLs for the terminology databases used in standardization work maintained by ISO and IEC are as follows: ---ISO online browsing platform: https://www:iso:org/obp; 3:1 rated thermal speed thermalspeedrating Internal temperature when the heat generated by bearing friction and the heat dissipated through the bearing support surface (shaft and housing) are balanced under reference conditions: ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 24609-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 24609-2023_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 24609-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 24609-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |