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GB/T 10225-2025: Accuracy of fine-pitch bevel gears
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 10225-2025	English	279	Add to Cart	3 days [Need to translate]	Accuracy of fine-pitch bevel gears
GB/T 10225-1988	English	769	Add to Cart	4 days [Need to translate]	Accuracy of fine-pitch bevel gears

GB/T 10225-2025: Accuracy of fine-pitch bevel gears

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ICS 21.200 CCSJ17 National Standards of the People's Republic of China Replaces GB/T 10225-1988 Small module bevel gear precision Published on 2025-12-02 Implemented on July 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Deviation Measurement 2 4.1 Classification and Requirements 2 4.2 Method Selection 3 5.Accuracy grade and tolerance requirements 3 5.1 Accuracy Class 3 5.2 Tolerance Direction 4 5.3 Tolerance reference diameter (dT) 4 5.4 Tolerance Marking 5 5.5 Additional Features 5 6.Tolerance Calculation 5 6.1 General Rules 5 6.2 Rounding Rules 5 6.3 Tolerance formula 5 References 8

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 10225-1988 "Precision of Small Module Bevel Gears". Compared with GB 10225-1988, except for structural adjustments and coding... Aside from the logical changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the 1988 edition); b) Terms and definitions have been changed (see Chapter 3, Chapter 3 of the 1988 edition); c) The requirements regarding the composition of precision units have been changed, the provisions regarding tolerance groups have been deleted, and measurement requirements for precision deviation items have been added (see...). Chapter 4 (Chapter 4 of the 1988 edition); d) The requirements for accuracy grades and the format of accuracy markings have been changed, and the requirements for gear blanks have been removed (see Chapter 5, Chapter 5 of the 1988 edition); e) The formula for calculating the tolerance value of the accuracy class and the rounding rules have been changed (see Chapter 6, Chapter 4 of the 1988 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the National Technical Committee on Gear Standardization (SAC/TC52). This document was drafted by. Zhengzhou Machinery Research Institute (Zhengzhou) Transmission Technology Co., Ltd., and Zhengzhou Machinery Research Institute Co., Ltd., China Academy of Machinery Science and Technology Group Corporation. Zhejiang Fengli Intelligent Technology Co., Ltd., Zhejiang Jiezhong Technology Co., Ltd., Shenzhen Zhaowei Electromechanical Co., Ltd., Xi'an Lei Shooting Transmission Technology Co., Ltd., Tianjin Jinyan Transmission Equipment Co., Ltd., Chongqing University, Henan University of Science and Technology, Zhongshan Mairet CNC Technology Co., Ltd. The company, Shenzhen Shunli Motor Co., Ltd., Northwestern Polytechnical University, and Chang'an University. The main drafters of this document are. Wang Zhigang, Wang Youli, Xu Yingjie, Fan Ruili, Wang Junheng, Sun Kun, Zhao Ning, Cao Zhigang, Jiang Chuang, and Yu Yongwang. Wang Dongfei, Zhou Mingyong, Guo Hui, Wang Yunqi, Sun Xia, Xin Dong, Guan Rongxin, Wei Bingyang, Shi Lubing, Song Chaosheng, Zhao Xuhe, Xu Wenbo, Pei Bang Dong Zuyan, Yan Yaolong, Guo Qingqing, Guan Hongjie, Yan Hongxiang, Zhi Yanfeng, Lin Xin, Sun Linlin, Yu Feipeng, Hou Nai, Nie Shaowu. This document was first published in 1988, and this is its first revision. Small module bevel gear precision Important Note. Familiarity with the contents of GB/T 11365 and GB /Z 18620.6 is essential for the use of this document.

1 Scope

This document specifies the deviation items, deviation measurement, accuracy grade, and tolerance requirements for the accuracy of individual small-module bevel gears (including hypoid gears). Calculate the tolerance value. This document applies to the following. ---0.2mm≤mmn< 1mm; ---5≤z≤200; ---5mm≤dT≤200mm. in. mmn --- Midpoint normal modulus; z --- Number of teeth; dT --- Tolerance reference diameter. Note. The precision grade of the gear obtained from this document does not have a direct correlation with the actual performance of the gear in use.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 2821 Gear Geometric Element Designations GB/T 3374.1 Gears - Terminology and Definitions - Part 1.Geometric Definitions GB/T 11365-2019 Precision System for Bevel Gears GB /Z 18620.3 Inspection Implementation Specification for Cylindrical Gears Part 3.Inspection of Gear Blanks, Shaft Center Distance and Axis Parallelism GB /Z 18620.6-2025 Inspection Implementation Specification Part 6.Measurement of Bevel Gears

3 Terms and Definitions

The terms and definitions defined in GB/T 2821, GB/T 3374.1 and GB /Z 18620.3 apply to this document. 3.1 Single pitch deviation On the same measuring circle, when the probe moves from a point on any tooth surface to a point on an adjacent tooth surface on the same side, the actual tooth surface relative to its theoretical position... Offset. [Source. GB/T 11365-2019, 3.1.7] 3.2 Fp For a given left or right tooth surface, the maximum algebraic difference between any two graduation deviations, regardless of the reading direction or algebraic sign. ...