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GB/T 24609-2023 English PDF

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GB/T 24609-2023: Rolling bearings - Thermal speed rating - Calculation
Status: Valid

GB/T 24609: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 24609-2023	English	334	Add to Cart	4 days [Need to translate]	Rolling bearings - Thermal speed rating - Calculation	Valid	GB/T 24609-2023
GB/T 24609-2009	English	559	Add to Cart	3 days [Need to translate]	Rolling bearings -- Thermal speed rating -- Calculation and coefficients	Obsolete	GB/T 24609-2009

PDF similar to GB/T 24609-2023

Standard similar to GB/T 24609-2023

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Basic data

Standard 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Older Standard (superseded by this standard)	GB/T 24609-2009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

Preface 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 12

Foreword

This 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 bearings

1 Scope

This 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 documents

The 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 definitions

The 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:

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