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GB/T 6074: Historical versions
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Leaf chains, clevises and sheaves - Dimensions, measuring forces, tensile strengths and dynamic strengths
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| GB/T 6074-2006 | English | 294 |
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Leaf chains clevises and sheaves -- Dimensions, measuring forces and tensile strengths
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Leaf chains, clevises and sheaves
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Leaf chains
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Basic data
| Standard ID | GB/T 6074-2025 (GB/T6074-2025) |
| Description (Translated English) | Leaf chains, clevises and sheaves - Dimensions, measuring forces, tensile strengths and dynamic strengths |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | J18 |
| Classification of International Standard | 21.220.30 |
| Word Count Estimation | 26,291 |
| Date of Issue | 2025-12-02 |
| Date of Implementation | 2026-07-01 |
| Older Standard (superseded by this standard) | GB/T 6074-2006 |
| Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China |
GB/T 6074-2025: Leaf chains, clevises and sheaves - Dimensions, measuring forces, tensile strengths and dynamic strengths
---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 21.220.30
CCSJ18
National Standards of the People's Republic of China
Replaces GB/T 6074-2006
Plate chain, connecting ring and pulley
Dimensions, measuring forces, tensile loads and dynamic loads
(ISO 4347.2015, IDT)
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
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4 chains 1
4.1 Structure and Form 1
4.2 Chain Number 1
4.3 Dimensions 2
4.4 Performance Requirements 10
4.4.1 General requirement 10
4.4.2 Minimum tensile load 10
4.4.3 Apply a tensile force of 10
4.4.4 Dynamic load test 10
4.5 Pre-stretch 10
4.6 Chain length measurement 10
4.7 Transition Link 11
4.8 Mark 11
5 Connecting ring 11
5.1 Form 11
5.2 Dimensions 11
5.3 Minimum tensile load 12
5.4 Chain Length Adjustment 12
6 Geneva wheel 15
Appendix A (Informative) Calculation Method for Minimum Dynamic Load of Chain 17
A.1 Overview 17
A.2 Examples of LH1666 (BL866) Chain Applications 18
Appendix B (Informative) Calculation Method for Determining the Maximum Test Load Fmax during Dynamic Load Testing 19
B.1 Overview 19
B.2 Examples of LH1666 (BL866) Chain Applications 19
References 20
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 6074-2006 "Dimensions, Measuring Forces and Tensile Strengths of Plate Chains, Connecting Rings and Grooved Wheels".
Compared with GB/T 6074-2006, apart from structural adjustments and editorial changes, the main technical changes are as follows.
---The explanation of chain number in "Chain Number" has been changed, and the pitch unit has been changed from "3.175mm (1/16in)" to...
In Example 2, change "1.5875mm (1/16in)" to "GB/T 124312A" (see 4.2, see...).
(2006 version 3.2);
---Dynamic load indicators have been added (see Table 1 and Table 2);
---Two annotations, c and d, have been added to "Table 1". Annotation c is used to indicate dynamic loads (see Table 1), chain numbers LH0844 and LH1044.
In LH1244, LH1644, LH2044, LH2444, LH2844, LH3244, and LH4044, the superscript 'b' should be changed to 'd' (see...).
Table 1 (see Table 1 in the.2006 edition);
---Note c has been added to Table 2 and marked under dynamic loads (see Table 2);
---Added considerations for chain applications on certain types of machines and conditions under which chain tests are invalid (see 4.4.1);
---In "Minimum Tensile Load", change "Minimum Strength Value" to "Minimum Load Value" (see 4.4.2, see 3.4.2 in the.2006 edition);
---A "Dynamic Load Test" has been added, providing a method for determining the dynamic load value and the maximum test load (see 4.4.4);
---Change "bent plate link" to "transition link" (see 4.7, see 3.7 in the.2006 edition);
---Change the outer contour radius r to the distance k from the pin hole center in the vertical direction to the outer contour arc, and also modify the relevant views.
Expression (see Figure 3, Table 3, and Table 4; see Figure 3, Table 3, and Table 4 in the.2006 edition).
This document is equivalent to the international standard ISO 4347.2015 "Plate chains, connecting links and pulleys - Dimensions, measuring forces, tensile strength and dynamic loads".
strength".
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 by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Chain Drives (SAC/TC164).
This document was drafted by. Jilin University Chain Transmission Research Institute, Jiangsu Shuangling Chain Transmission Co., Ltd., and Zhejiang Hengjiu Transmission Technology Co., Ltd.
The company, Hangzhou Donghua Chain Group Co., Ltd., Qingdao Zhenghe Industrial Co., Ltd., Global Transmission Taizhou Co., Ltd., and Hangzhou Shield Chain.
Limited Liability Company, Hangzhou Ziqiang Chain Transmission Co., Ltd., Huzhou Shuangshi Chain Transmission Co., Ltd., Jiangshan Yongli Baihe Industry Co., Ltd., Zhejiang Deli
Kunlian Transmission Co., Ltd., Hangzhou Qianjiang Chain Transmission Co., Ltd., Qingdao Daneng Environmental Protection Equipment Co., Ltd., Wuyi Dongfeng Chain Co., Ltd.
The companies include Anhui Huangshan Hengjiu Chain Transmission Co., Ltd., Hangzhou Chizheng Technology Co., Ltd., and Jiangsu Huapu Testing Technology Co., Ltd.
The main drafters of this document are. Cheng Yabing, Li Feng, Lu Jianfu, Lu Jiguang, Jin Yumo, Liu Jiaqiang, Xu Weili, Wang Lili, and Yin Debing.
Zheng Jinbo, Ma Jinhua, Sun Ju, Yu Yongqiang, Zhang Zengwu, Fu Zhenming, Tao Wenjun, An Lichi, Yin Weiqi, Zhang Kefei, Yao Guoping, Xia Zhanhao.
The release history of this document and the document it replaces is as follows.
---First published as GB 6074-1985 in 1985, revised for the first time in.1995, and revised for the second time in.2006;
---This is the third revision.
Introduction
This document includes two series of chains, one derived from the ISO 606A series and the American ASME B29.8 standard.
One series of chains is marked with the symbol "LH" or "BL"; another series is derived from the ISO 606B series and is marked with the symbol "LL".
mark.
Tables 1 and 2 both specify the minimum dynamic load requirements; calculation details are provided in Appendix A.
Plate chain, connecting ring and pulley
Dimensions, measuring forces, tensile loads and dynamic loads
1 Scope
This document specifies the technical characteristics of plate chains used for general lifting, including the shape of the pulleys and connecting rings. The content includes dimensions, interchangeability, and other specifications.
Limit, chain length measurement, pretension, minimum tensile load and minimum dynamic load.
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.
Note. GB/T 1243-2024 Short-pitch precision roller chains, bushing chains, accessories and sprockets for transmission (ISO 606.2015, IDT)
rolerchain)
Note. GB/T 20736-2006 Fatigue test method for precision roller chains for transmission (ISO 15654.2004, IDT)
ASME B29.8 Leafchains, Clevises and Sheaves
3 Terms and Definitions
This document does not contain any terms or definitions that need to be defined.
4 chains
4.1 Structure and Form
The structure and type of the chain are shown in Figure 1, Table 1 and Table 2.The figures do not define the actual shape of the chain plates.
4.2 Chain Number
Plate chains derived from the ISO 606A (ASME B29.8) series are designated with the prefix "LH" ("BL"); those derived from the ISO 606B series...
The derived plate chain is designated with the prefix "LL"; the first two digits of the designation indicate the chain pitch, which is 1.5875 mm (1/16 in).
Multiple; the last two digits indicate the combination of chain plates (the combination of the number of outer chain plates and the number of inner chain plates).
The same principle is used in the ASME "BL" designation method, where the first one or two digits of the designation represent the chain pitch.
Multiples of 1/8in.
Example 1.The nominal pitch of a plate chain derived from ISO 60608B, with 12.7mm, and containing two inner and two outer chain plates, is designated as follows.
LL0822
Example 2.A plate chain with a nominal pitch of 19.05 mm, derived from ISO 60612A (ASME 60 chain), comprising 3 outer link plates and 4 inner link plates.
The chain number is as follows.
...
