GB/T 39641-2020 English PDF

US$869.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 39641-2020: Methods for gaging fastening screw threads by thread indicating gages
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39641-2020	869	Add to Cart	6 days	Methods for gaging fastening screw threads by thread indicating gages	Valid

Similar standards

GB/T 40117   GB/T 40307   GB/T 39432   GB/T 39643   GB/T 39642   

Basic data

Standard ID: GB/T 39641-2020 (GB/T39641-2020)
Description (Translated English): Methods for gaging fastening screw threads by thread indicating gages
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 21.040.01
Word Count Estimation: 47,485
Date of Issue: 2020-12-14
Date of Implementation: 2021-07-01
Quoted Standard: GB/T 14791; JJF 1001; JJF 1059.1
Regulation (derived from): National Standard Announcement No. 28 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the method for the thread indicator gauge to detect the tightening thread parameters. Fastening thread parameters include: active pitch diameter, basic thread bottom diameter, design thread bottom diameter, pitch diameter, single-pitch diameter, radial pitch diameter difference, axial pitch diameter difference, pitch (lead), flank Angle, tooth type comprehensive deviation, top diameter and pitch diameter jump. This standard applies to the detection of fastening thread parameters (the minimum nominal diameters of internal and external threads are 4.8 mm and 1 mm, respectively).

GB/T 39641-2020: Methods for gaging fastening screw threads by thread indicating gages

---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.
(Thread indicating gauge detects tightening thread method) ICS 21:040:01 J04 National Standards of People's Republic of China Thread indicating gauge detects tightening thread method 2020-12-14 release 2021-07-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Preface Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Test conditions 2 5 Correspondence between tested parameters and gauge and probe type 2 6 Testing method of tightening external thread parameters 3 7 Fastening internal thread parameter detection method 21 8 Qualified judgment 37 Appendix A (informative appendix) thread indicator gauge probe profile 38 Appendix B (informative appendix) Metric tolerances of standard thread gauges and thread indicator gauge probes 39 Appendix C (informative appendix) Test items for thread indicating gauge and standard thread gauge 42 Appendix D (informative appendix) Thread indicating gauge force measuring range and testing method 43 Reference 44

Foreword

This standard was drafted in accordance with the rules given in GB/T 1:1-2009: Please note that certain contents of this document may involve patents: The issuing agency of this document is not responsible for identifying these patents: This standard was proposed and managed by the National Thread Standardization Technical Committee (SAC/TC108): Drafting organizations of this standard: Shanghai Institute of Metrology and Testing Technology, China Machinery Productivity Promotion Center, Suzhou Edmund Measurement and Control System Co:, Ltd: The company, Zhejiang Institute of Metrology, Beijing Automotive Group Off-road Vehicle Co:, Ltd:, Shanghai Fastener and Welding Material Technology Research Institute Limited company: The main drafters of this standard: Wang Jian, Cai Minggang, Li Xiaobin, Fan Junlian, Lao Yihong, Luan Jianxin, Xue Junyi: Thread indicating gauge detects tightening thread method

1 Scope

This standard specifies the method for the thread indicator gauge to detect the tightening thread parameters: Fastening thread parameters include: active pitch diameter, basic thread bottom Diameter, design bottom diameter, pitch diameter, single pitch diameter, radial pitch difference, axial pitch difference, pitch (lead), flank angle, tooth profile comprehensive deviation, top diameter Relative pitch diameter jump: This standard applies to the detection of fastening thread parameters (the minimum nominal diameters of internal and external threads are 4:8mm and 1mm, respectively):

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: GB/T 14791 Thread Terminology JJF1001 General measurement terms and definitions JJF1059:1 Evaluation and expression of measurement uncertainty

3 Terms and definitions

The following terms and definitions defined in GB/T 14791, JJF1001 and JJF1059:1 apply to this document: 3:1 Thread detection testonscrewthreads A set of operations to determine whether a threaded product meets the requirements of the corresponding standard: Note: These operations usually include the measurement of the thread parameter value and (or) whether it exceeds the allowable limit: 3:2 Variationofpitchdiameterindifferentradialdirections Within a lead length, the maximum difference between each radial pitch diameter (take a positive value): Note: The radial cross-sectional shape of the medium diameter cylinder is usually elliptical or triangular: Two-point contact (two probes separated by 180°) and three-point contact (three probes) The head spacing is 120°) gauge to measure the pitch diameter in the elliptical and triangular cross-sections: [GB/T 37050-2019, definition 3:2] 3:3 Variationofpitchdiameteratdifferentaxialpositions The maximum difference (positive value) between the pitch diameters of each axial position in the thread axis plane and the specified screwing length: Note: In the case where the supplier and the buyer agree, the axial pitch diameter difference can only be measured at both ends of the complete thread: [GB/T 37050-2019, definition 3:3] 3:4 Cumulative form deviation Within the specified screwing length, the deviation from other thread parameters (pitch, flank angle, radial pitch diameter difference, axial pitch diameter difference, etc:) other than pitch diameter The maximum change in the diameter of the action caused by the combined action: ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39641-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39641-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 39641-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39641-2020_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.