JJG 707-2014 English PDF

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JJG 707-2014: Torque Wrenches
Status: Valid

JJG 707: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 707-2014	399	Add to Cart	3 days	Torque Wrenches	Valid
JJG 707-2003	759	Add to Cart	5 days	Verification Regulation of Torque Wrenches	Obsolete
JJG 707-1990	319	Add to Cart	3 days	Verification Regulation of Wrench for Measurement of Torque	Obsolete

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GB/T 36126   JJG 667   GB/T 1885   JJG 159   JJG 126   JJF 702   

Basic data

Standard ID: JJG 707-2014 (JJG707-2014)
Description (Translated English): Torque Wrenches
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.100
Word Count Estimation: 17,172
Date of Issue: 6/15/2014
Date of Implementation: 12/15/2014
Older Standard (superseded by this standard): JJG 707-2003
Quoted Standard: JJG 557-2011; JJG 797-2013; GB/T 3390.2-2004; GB/T 15729-2008
Regulation (derived from): The State Administration of Quality Supervision, Inspection and Quarantine Notice No. 64 of 2014
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine
Summary: This Standard specifies the manual torque with a torque measuring board or control mechanism, torque and other structures in the form of a spiral blade tightening measuring instruments (hereinafter referred to as the torque of the board) of the initial ve

JJG 707-2014: Torque Wrenches

---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.
Torque Wrenches State verification procedures People's Republic of China Torque wrench Issued on. 2014-06-15 2014-12-15 implementation The State Administration of Quality Supervision, Inspection and Quarantine released Torque wrench test procedures Replacing JJG 707-2003 Focal point. the National Technical Committee on Metering hardness force value The main drafting units. China Shipbuilding Industry Corporation seventh THOUSAND AND FORTY Institute China Institute of Metrology Participated in the drafting unit. Hubei Provincial Institute of Measurement and Testing Shaanxi Orient Aviation Instrument Co., Ltd. This procedure hardness values measured force commissioned by the National Technical Committee is responsible for interpretation The main drafters of this procedure. Li Tao (China Shipbuilding Industry Corporation seventh THOUSAND AND FORTY Institute) Nitrogeh Co (China Institute of Metrology) Drafters participate. Lin Jing (China Shipbuilding Industry Corporation seventh THOUSAND AND FORTY Institute) Meng Feng (China Institute of Metrology) Hu Xiang (Hubei Institute of Measurement and Testing) Chen Xi (China Shipbuilding Industry Corporation seventh THOUSAND AND FORTY Institute) Jianggang Cheng (Shaanxi Orient Aviation Instrument Co., Ltd.)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 Overview (1) 4 metering performance requirements (1) 5 General Requirements (2) 5.1 Appearance and accessories (2) 5.2 indication and setting means (2) 5.3 Adaptability (2) 6 Control of measuring instruments (2) 6.1 Verification condition (2) 6.2 test items and test methods (3) 6.3 test results processing (6) 6.4 test cycle (6) Appendix A torque wrench calibration works diagram (7) with a torque multiplier Appendix B to the side dimension of the transmission torque with mortise and tenon (8) Appendix C torque wrench calibration original records (9) Appendix D calibration certificate/test results in the notice page format (10)

Introduction

JJF1002-2010 "national verification procedures write rules", JJF1001-2011 "common terminology and measurement Definitions ", JJF1059.1-2011" Evaluation and Expression of Uncertainty in Measurement "constitute support this protocol revision work As a series of basic norms. This procedure compared with JJG 707-2003, in addition to editorial changes, the major technical changes are as follows. --- Increased introduction; --- Delete the contents of a powered torque tools; --- Remove the overload performance of the test; --- Remove the original procedure 6.2.4.5a) 2) to add a disk with arm weights test content; --- Improve the required torque standard equipment (see 6.1.2); --- Increasing the torque wrench Driving square square hole requirements (see 6.1.3); --- Improve the torque wrench of different test methods (see 6.2.2.4); --- Improved test prescribed period (see 6.4); --- Remove the original "Appendix A arm weight verification device works"; --- Added "Appendix B transmission torque and mortise and tenon on the edge dimension." The previous versions of this Recommendation published case. --- JJG 707-2003; --- JJG 707-1990. Torque wrench test procedures

1 Scope

The order applies to manual torque wrench with a torque measuring or control mechanism, torque screwdrivers and other structural shape Type tightening measuring instruments (hereinafter referred to as torque wrench) initial verification, use and subsequent verification check. 2. References This procedure references the following documents. JJG 557-2011 standard torque meter JJG 797-2013 torque wrench Calibrator GB/T 3390.2-2004 manual transmission mortise and tenon and socket wrenches square hole GB/T 15729-2008 General technical manual torque wrench For dated references, only the dated edition applies to this procedure; undated reference documents Member, the latest edition (including any amendments) applies to this procedure.

3 Overview

Torque wrench by torque balance principle. Torque wrench according to the structure shown generally divided into two kinds of preset values and formula Form, showing the value type can be divided into Analog and digital; Preset can be divided with a scale and adjustable setting formula. Torque wrench is mainly used for fastening bolts, nuts or screws, and can be measured (or control) Tighten torque value-tight, In order to control an indirect solid connection between the fastening shaft force consistency purposes bolt (or screw).

4 metering performance requirements

Torque wrench accuracy level is divided and technology indicators should meet the requirements of Table 1. Table 1 torque wrench accuracy levels and technical specifications Accuracy Level Relative error e Repeatability R Showed the relative resolution α * Back to zero error Z * r % FS 1 ± 1.0 1.0 0.5 ± 0.1 2 ± 2.0 2.0 1.0 ± 0.2 3 ± 3.0 3.0 1.5 ± 0.3 4 ± 4.0 4.0 2.0 ± 0.4 5 ± 5.0 5.0 2.5 ± 0.5 6 ± 6.0 6.0 3.0 ± 0.6 10 ± 10.0 10.0 5.0 ± 1.0 Note 1. with "*", the value of pre-type torque wrench No preference; Note 2. Torque wrench indicated value of measuring range measuring 20% to 100% of the ceiling. ......

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