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Position: Chinese Standard in English/GB/T 5796.1-2022
GB/T 5796.1-2022   Trapezoidal screw threads—Part 1: Profiles (English Version)
Standard No.: GB/T 5796.1-2022 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 4000 words Price(USD):120.0 remind me the price change

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Implemented on:2022-10-1 Delivery: via email in 1 business day
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Standard No.: GB/T 5796.1-2022
English Name: Trapezoidal screw threads—Part 1: Profiles
Chinese Name: 梯形螺纹 第1部分:牙型
Professional Classification: GB    National Standard
ICS Classification: 21.040.10 21.040.10    Metric screw threads 21.040.10
Issued by: SAMR; SAC
Issued on: 2022-03-09
Implemented on: 2022-10-1
Status: valid
Superseding:GB/T 5796.1-2005 Trapezoidal Screw Threads - Part 1: Profiles
Language: English
File Format: PDF
Word Count: 4000 words
Price(USD): 120.0
Delivery: via email in 1 business day
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This document is drafted in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. This document is Part 1 of GB/T 5796 Trapezoidal screw threads. The following parts of GB/T 5796 have been published: ——Part 1: Profiles; ——Part 2: General plan; ——Part 3: Basic dimensions; ——Part 4: Tolerances. This document replaces GB/T 5796.1-2005 Trapezoidal screw threads - Part 1: Profiles. In addition to structural adjustment and editorial changes, the following main technical changes have been made with respect to GB/T 5796.1-2005: ——The symbol of the thread height on basic profile is changed from “H1” to “H2” (see Clause 4; 3.2 in Edition 2005); ——The symbols of the thread overlap on design profile “H0” and the width of flat crest or root on basic profile “w” are added (see Clause 4); ——The description on the starting positions of thread limit deviations is added (see Clause 6); ——The number of decimal places of coefficients is changed from 3 to 9 in the calculation formula for the fundamental triangle height H (see Clause 5; Table 1 in Edition 2005). This document is modified in relation to ISO 2901:2016 ISO metric trapezoidal screw threads – Basic and design profiles. The technical differences with respect to ISO 2901:2016 and their justifications are as follows:   ——The standard ISO 5408 is changed from information to normative reference, and replaced by GB/T 14791 (see Clause 3), so as to make it meet the compilation requirements for national standards; ——The tips in Tables 1 and 2 are changed from statements to requirements (see Clauses 5 and 6), and the attributes of the requirements in the two tables are clarified; ——The basic dimension formulae for major, pitch and minor diameters of thread (D1, d2 and D2, d3, D4) are deleted (see Clause 6 in ISO 2901:2016), without repeating the corresponding technical content given in GB/T 5796.3. The following editorial changes have been made in this document: ——The name of the document is changed to Trapezoidal screw threads - Part 1: Profiles. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by and is under the jurisdiction of SAC/TC 108 National Technical Committee on Screw Threads of Standardization Administration of China. This document was firstly issued in 1965, firstly revised in 1986, secondly in 2005, and thirdly this time.   Introduction GB/T 5796 Trapezoidal screw threads consists of four parts. ——Part 1: Profiles. It provides a technical basis for establishing the basic dimension formulae for thread diameters and determining the starting positions for thread tolerance zone in Parts 3 and 4. ——Part 2: General plan; It provides a specification basis for nominal diameters and pitches to establish the basic dimension table for thread diameters and determine the thread tolerance table in Parts 3 and 4. ——Part 3: Basic dimensions. It provides a technical basis for determining the limit size of thread diameter. ——Part 4: Tolerances. It provides a technical basis for production and inspection of the products. Profiles, general plan, basic dimensions and tolerances constitute a complete system of technical parameters for Trapezoidal screw threads. These technical parameters are specified as a single standard to be convenient for users to check and use. Trapezoidal screw threads - Part 1: Profiles 1 Scope This document specifies the basic and design profiles of trapezoidal screw threads. This document is chiefly applicable to traversing threads for traversing motion on machines, tools, etc. It may also be used for fastening threads. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 14791 Screw threads - Vocabulary (GB/T 14791-2013, ISO 5408:2009, IDT) 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 14791 apply. 4 Symbols For the purposes of this document, the following symbols apply. D major diameter of internal thread on basic profile (nominal diameter) D4 major diameter of internal thread on design profile d major diameter of external thread (nominal diameter) D2 pitch diameter of internal thread d2 pitch diameter of external thread D1 minor diameter of internal thread d1 minor diameter of external thread on basic profile d3 minor diameter of external thread on design profile P pitch H fundamental triangle height H2 thread height on basic profile H0 thread overlap on design profile H4 thread height of internal thread on design profile h3 thread height of external thread on design profile ac clearances at major and minor diameters on design profile w width of flat crest or root on basic profile R1 radius on crest corners of external thread on design profile R2 radius on root corners of internal and external threads on design profile 5 Basic profile The basic profile is shown as a thick line in Figure 1. It is common to internal and external threads. The dimensions of the basic profile are given in Table 1. The dimensions of the basic profile are calculated by using the following formulae:
Foreword II Introduction IV 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Basic profile 6 Design profile
Referred in GB/T 5796.1-2022:
*GB/T 14791-2013 Screw Threads - Vocabulary
GB/T 5796.1-2022 is referred in:
*GB/T 28776-2012 Steel gate, globe and check valve for the petroleum and natural gas industries (for sizes DN100 and smaller)
*GB/T 12234-2007/XG1-2011 Bolted bonnet steel gate valves for petroleum and natural gas industries (including Amendment 1)
*GB/T 18365-2018 Hot-extruded PE protection paralleled high strength wire cable for cable-stayed bridge
*GB/T 9160.2-2017 Rolling bearings―Accessories―Part 2:Locknuts and locking devices
*GB/T 9160.1-2017 Rolling bearings―Accessories―Part 1: Adapter sleeve assemblies and withdrawal sleeves
*CJ/T 25-2018 Hand flow adjusting valves for heating
*GB/T 12232-2005 General purpose industrial valve——Flanged iron gate valves
*GB/T 2666-2001 Vomen and mans trousers
*YY 0285.1-1996 Disposable Sterile intravascular catheters and accessories - Part 1: General requirements
Code of China
Standard
GB/T 5796.1-2022  Trapezoidal screw threads—Part 1: Profiles (English Version)
Standard No.GB/T 5796.1-2022
Statusvalid
LanguageEnglish
File FormatPDF
Word Count4000 words
Price(USD)120.0
Implemented on2022-10-1
Deliveryvia email in 1 business day
Detail of GB/T 5796.1-2022
Standard No.
GB/T 5796.1-2022
English Name
Trapezoidal screw threads—Part 1: Profiles
Chinese Name
梯形螺纹 第1部分:牙型
Chinese Classification
Professional Classification
GB
ICS Classification
Issued by
SAMR; SAC
Issued on
2022-03-09
Implemented on
2022-10-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 5796.1-2005 Trapezoidal Screw Threads - Part 1: Profiles
Language
English
File Format
PDF
Word Count
4000 words
Price(USD)
120.0
Keywords
GB/T 5796.1-2022, GB 5796.1-2022, GBT 5796.1-2022, GB/T5796.1-2022, GB/T 5796.1, GB/T5796.1, GB5796.1-2022, GB 5796.1, GB5796.1, GBT5796.1-2022, GBT 5796.1, GBT5796.1
Introduction of GB/T 5796.1-2022
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This document is drafted in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. This document is Part 1 of GB/T 5796 Trapezoidal screw threads. The following parts of GB/T 5796 have been published: ——Part 1: Profiles; ——Part 2: General plan; ——Part 3: Basic dimensions; ——Part 4: Tolerances. This document replaces GB/T 5796.1-2005 Trapezoidal screw threads - Part 1: Profiles. In addition to structural adjustment and editorial changes, the following main technical changes have been made with respect to GB/T 5796.1-2005: ——The symbol of the thread height on basic profile is changed from “H1” to “H2” (see Clause 4; 3.2 in Edition 2005); ——The symbols of the thread overlap on design profile “H0” and the width of flat crest or root on basic profile “w” are added (see Clause 4); ——The description on the starting positions of thread limit deviations is added (see Clause 6); ——The number of decimal places of coefficients is changed from 3 to 9 in the calculation formula for the fundamental triangle height H (see Clause 5; Table 1 in Edition 2005). This document is modified in relation to ISO 2901:2016 ISO metric trapezoidal screw threads – Basic and design profiles. The technical differences with respect to ISO 2901:2016 and their justifications are as follows:   ——The standard ISO 5408 is changed from information to normative reference, and replaced by GB/T 14791 (see Clause 3), so as to make it meet the compilation requirements for national standards; ——The tips in Tables 1 and 2 are changed from statements to requirements (see Clauses 5 and 6), and the attributes of the requirements in the two tables are clarified; ——The basic dimension formulae for major, pitch and minor diameters of thread (D1, d2 and D2, d3, D4) are deleted (see Clause 6 in ISO 2901:2016), without repeating the corresponding technical content given in GB/T 5796.3. The following editorial changes have been made in this document: ——The name of the document is changed to Trapezoidal screw threads - Part 1: Profiles. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by and is under the jurisdiction of SAC/TC 108 National Technical Committee on Screw Threads of Standardization Administration of China. This document was firstly issued in 1965, firstly revised in 1986, secondly in 2005, and thirdly this time.   Introduction GB/T 5796 Trapezoidal screw threads consists of four parts. ——Part 1: Profiles. It provides a technical basis for establishing the basic dimension formulae for thread diameters and determining the starting positions for thread tolerance zone in Parts 3 and 4. ——Part 2: General plan; It provides a specification basis for nominal diameters and pitches to establish the basic dimension table for thread diameters and determine the thread tolerance table in Parts 3 and 4. ——Part 3: Basic dimensions. It provides a technical basis for determining the limit size of thread diameter. ——Part 4: Tolerances. It provides a technical basis for production and inspection of the products. Profiles, general plan, basic dimensions and tolerances constitute a complete system of technical parameters for Trapezoidal screw threads. These technical parameters are specified as a single standard to be convenient for users to check and use. Trapezoidal screw threads - Part 1: Profiles 1 Scope This document specifies the basic and design profiles of trapezoidal screw threads. This document is chiefly applicable to traversing threads for traversing motion on machines, tools, etc. It may also be used for fastening threads. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 14791 Screw threads - Vocabulary (GB/T 14791-2013, ISO 5408:2009, IDT) 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 14791 apply. 4 Symbols For the purposes of this document, the following symbols apply. D major diameter of internal thread on basic profile (nominal diameter) D4 major diameter of internal thread on design profile d major diameter of external thread (nominal diameter) D2 pitch diameter of internal thread d2 pitch diameter of external thread D1 minor diameter of internal thread d1 minor diameter of external thread on basic profile d3 minor diameter of external thread on design profile P pitch H fundamental triangle height H2 thread height on basic profile H0 thread overlap on design profile H4 thread height of internal thread on design profile h3 thread height of external thread on design profile ac clearances at major and minor diameters on design profile w width of flat crest or root on basic profile R1 radius on crest corners of external thread on design profile R2 radius on root corners of internal and external threads on design profile 5 Basic profile The basic profile is shown as a thick line in Figure 1. It is common to internal and external threads. The dimensions of the basic profile are given in Table 1. The dimensions of the basic profile are calculated by using the following formulae:
Contents of GB/T 5796.1-2022
Foreword II Introduction IV 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 Basic profile 6 Design profile
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Keywords:
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