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GB/T 21307-2025: Roller gin
Status: Valid GB/T 21307: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 21307-2025 | English | 379 |
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Roller gin
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GB/T 21307-2025
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| GB/T 21307-2007 | English | 259 |
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Roller gin
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GB/T 21307-2007
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PDF similar to GB/T 21307-2025
Basic data | Standard ID | GB/T 21307-2025 (GB/T21307-2025) | | Description (Translated English) | Roller gin | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B93 | | Classification of International Standard | 65.040.20 | | Word Count Estimation | 18,178 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | GB/T 21307-2007 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 21307-2025: Roller gin---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 65.040.020
CCSB93
National Standard of the People's Republic of China
Replace GB/T 21307-2007
Roller gin
Rolergin
Released on 2025-04-25
2025-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Product Model 2
5 Technical Requirements 2
6 Test methods 4
7 Inspection Rules 7
8 Marking, packaging, storage and transportation 8
Appendix A (Normative) Calculation of the allowable unbalance of a steady-state (rigid) rotor 10
Appendix B (Normative) Determination of Cottonseed Hair Rate 11
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 21307-2007 "Roller Cotton Gin". Compared with GB/T 21307-2007, except for structural adjustments and editorial changes,
In addition to the modifications, the main technical changes are as follows.
a) The product model structure has been changed and the classification code has been added (see Chapter 4, 3.2 of the.2007 edition);
b) Deleted the requirements for processed seed cotton (see 4.1 of the.2007 edition);
c) The basic parameters (see 3.1 of the.2007 edition) have been deleted;
d) Increased the effective working length output of the roller gin (see 5.3.6, 5.3.7);
e) The provisions on the yellow root rate and rough head rate of processed lint cotton have been changed (see 5.3.10, 4.2.4 of the.2007 edition);
f) The cotton drop rate should not be greater than 1.5% (see 5.3.11, 4.2.5 of the.2007 edition);
g) The service life of the top roller has been deleted (see 4.2.7 of the.2007 edition);
h) Added the requirements for punching knife and fixed knife parts (see 5.2.6 and 5.2.7);
i) Added assembly requirements for punching cutters and fixed cutters (see 5.3.1 and 5.3.2).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Federation of Supply and Marketing Cooperatives.
This document was prepared by the National Cotton Processing Standardization Technical Committee (SAC/TC407), the National Agricultural Machinery Standardization Technical Committee
(SAC/TC201) is responsible for this matter.
This document was drafted by. Shandong Swan Cotton Machinery Co., Ltd., Xinjiang Swan Modern Agricultural Machinery Equipment Co., Ltd., China
Zhengzhou Cotton and Linen Engineering Technology Design Institute of China Supply and Marketing Cooperatives, Shihezi University, Nantong Yufeng Plastic Steel Packaging Co., Ltd., Xinjiang Agricultural Reclamation Science
Institute, Xinjiang Uygur Autonomous Region Metrology and Testing Institute, Inner Mongolia Yetian Tieniu Agricultural Equipment Co., Ltd.
The main drafters of this document are. Liu Wenpu, Wang Yugang, Li Huaikun, Gao Haiqiang, Liu Juan, Wang Xinting, Wang Ruixia, Li Zhantao, Zhao Pengda, Li Yongqiang,
Sun Zhaoming, Bi Xinsheng, Zhang Ruoyu, Li Bin, Wei Bing, Liu Sijia, Yang Jianning, Huang Xiaochi, Zhang Jian.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2007 as GB/T 21307-2007;
---This is the first revision.
Roller gin
1 Scope
This document specifies the technical requirements for the appearance quality, quality of main parts and components, and performance of the whole machine, as well as the inspection rules and signs,
It also describes the packaging, storage and transportation, and the corresponding sampling and testing methods, and gives the composition and classification of product models.
This document is applicable to the design, manufacture and quality inspection of roller ginning machines.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 191 Pictorial markings for packaging, storage and transportation
GB/T 6103 Test method for defects in raw cotton - Manual method
GB/T 6388 Shipping and receiving marks for transport packaging
GB/T 9239.1-2006 Mechanical vibration steady-state (rigid) rotor balancing quality requirements Part 1.Specifications and balance tolerances
test
GB 18399 Safety requirements for cotton processing machinery
GB/T 19635-2024 Cotton Long-staple cotton
GB/T 32139-2015 Cotton processing terminology
3 Terms and definitions
The terms and definitions defined in GB/T 32139-2015 and the following apply to this document.
3.1
Hob doubleknife
A component of a roller gin that performs a rotary motion to impact the seed cotton, separating the fibers from the seeds.
3.2
Moving knife
A component of a roller gin that performs reciprocating motion, impacting the seed cotton and separating the fibers from the seeds.
3.3
fixedknife
A relatively fixed component of the roller gin that blocks the seed cotton and separates the fibers from the seeds.
3.4
Roller coveredroler
The outer layer is a component made of leather strips of uniform thickness wrapped in a spiral shape on the surface of a wooden stick.
[Source. GB/T 32139-2015, 3.1.1.1]
3.5
The percentage of the weight of the hair contained in a certain weight of cotton seeds to the weight of the cotton seed sample.
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