HOME   Cart(0)   Quotation   About-Us Policy PDFs Standard-List
www.ChineseStandard.net Database: 189759 (19 Oct 2025)

GB/T 26548.4-2020 English PDF

US$474.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 26548.4-2020: Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 4: Straight grinders
Status: Valid
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 26548.4-2020English474 Add to Cart 3 days [Need to translate] Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 4: Straight grinders Valid GB/T 26548.4-2020

PDF similar to GB/T 26548.4-2020


Standard similar to GB/T 26548.4-2020

GB/T 45677   GB/T 5357   JB/T 3943   GB/T 26548.13   GB/T 26548.5   GB/T 26548.11   

Basic data

Standard ID GB/T 26548.4-2020 (GB/T26548.4-2020)
Description (Translated English) Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 4: Straight grinders
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J48
Classification of International Standard 13.160; 25.140.10
Word Count Estimation 25,294
Date of Issue 2020-03-31
Date of Implementation 2021-02-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 26548.4-2020: Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 4: Straight grinders


---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.
Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 4.Straight grinders ICS 13.160; 25.140.10 J48 National Standards of People's Republic of China Vibration test method for handheld portable power tools Part 4.Straight shank grinder (ISO 28927-4.2010, IDT) 2020-03-31 released 2021-02-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅰ Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 2 4 Basic criteria and vibration test methods 2 5 Description of machine type 3 6 Description of vibration characteristics 3 7 Instrument requirements 5 8 Machine test and operating conditions 6 9 Measurement procedures and effectiveness of measurement 9 10 Test report 10 Appendix A (informative appendix) Vibration test report format of straight shank grinder 11 Appendix B (Normative Appendix) Determination of Uncertainty 13 Appendix C (Normative Appendix) Design of Test Wheel 14 Reference 20

Foreword

GB/T 26548 "Handheld portable power tools vibration test methods" is divided into the following parts. ---Part 1.Angle and face grinders; ---Part 2.Gas trigger, nut wrench and screwdriver; ---Part 3.Polishing machines, rotary, sliding and double polishing machines; ---Part 4.Straight shank grinder; ---Part 5.Drills and impact drills; ---Part 6.Compactor; ---Part 7.Punching machine and scissors; ---Part 8.Reciprocating saws, polishing machines and files, and pendulum or rotary saws; ---Part 9.Derusting hammer and needle beam derusting device; --- Part 10.Impact rock drills, hammers and crushers; ---Part 11.Stone Hammer; ---Part 12.Mold grinder; ---Part 13.Fastener drive tools. This part is Part 4 of GB/T 26548. This section was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this part is equivalent to ISO 28927-4.2010 ``Hand-held portable power tools vibration test method Part 4. Straight shank grinder." This part incorporates the amendments to ISO 28927-4.2010/Amd.1.2017.The clauses involved in these amendments have been adopted in its The vertical double line (‖) of the outer margin position is marked. The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows. ---GB/T 77-2007 Hexagon socket set screws with flat end (ISO 4026.2003, MOD) ---GB/T 78-2007 Hexagon socket set screws with cone point (ISO 4027.2003, MOD) ---GB/T 80-2007 Hexagon socket set screws (ISO 4029.2003, MOD) ---GB/T 4127.12-2008 Dimensions of consolidated abrasives Part 12.Deburring and barren grinding wheels for straight grinders (ISO 603-12.1999,MOD) ---GB/T 5621-2008 Rock drilling machinery and pneumatic tools performance test method (ISO 2787.1984, MOD) ---GB/T 6247.1-2013 Terminology for rock drilling machinery and portable power tools Part 1.Rock drilling machinery, pneumatic tools and Pneumatic machinery (ISO 5391.2003, MOD) ---GB/T 6247.2-2013 Terminology for rock drilling machinery and portable power tools Part 2.Hydraulic tools (ISO 17066. 2007, IDT) ---GB/T 14790.1-2009 Mechanical vibration Measurement and evaluation of human body exposure to hand-transmitted vibration Part 1.General requirements (ISO 5349-1.2001,IDT) ---GB/T 14790.2-2014 Mechanical vibration Measurement and evaluation of human exposure to hand-transmitted vibration Part 2.Workplace Practical Guide to Measurement (ISO 5349-2.2001, IDT) ---GB/T 25631-2010 Mechanical vibration Hand-held and hand-guided mechanical vibration evaluation rules (ISO 20643.2005, IDT) This section has made the following editorial changes. --- Convert the "bar" in the international standard to "MPa" (1bar=0.1MPa). This part was proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Standardization Technical Committee for Rock Drilling Machinery and Pneumatic Tools (SAC/TC173). Drafting organizations of this section. Taitian Group Co., Ltd., Tianshui Rock Drilling Machinery Pneumatic Tool Research Institute, National Pneumatic Product Quality Supervision and Inspection Center, Shaanxi Pneumatic Dynasty Industry and Trade Co., Ltd. The main drafters of this section. Lin Xuejun, Chen Jilong, Hui Weian, Li Yonggang, Luo Jun, Gao Xuejing, Chen Zexi.

Introduction

This document is a Type C standard specified in ISO 12100. For machines designed and manufactured in accordance with the requirements of Type C standards, when the requirements of Type C standards are different from those in Type A or Type B standards At the time, the requirements in the C standard are better than other standards. ISO 20643 gives general technical conditions for handheld and hand-guided mechanical vibration radiation measurement. GB/T 26548 takes this standard as Foundation, given the vibration test method of the handheld portable machine, stipulated the operation of the machine under the type test condition and the type test performance Other requirements. The standard structure and chapter numbering are consistent with ISO 20643. This part of GB/T 26548 adopts the basic sensor positioning method first adopted in the European series of standards EN60745. The reason for continuity is inconsistent with ISO 20643 in description. The sensor is preferably placed near the area between the thumb and index finger of the hand, because This position has the least interference with the operator holding the machine. Generally, the vibration produced by the grinder varies greatly during use, which is largely due to the change in the imbalance of the installed grinder. caused. The wear of the grinding wheel during use will also change its imbalance. In order to provide a test method that can give better reproducibility measurement results, this part of GB/T 26548 adopts a The test wheel with known unbalance is installed on the machine and used for the test during the working process of running under no-load condition. Different forms of test wheels The unbalance degree should be selected as far as possible according to the vibration value specified in ISO 20643.The ISO 5349 procedure is used for the assessment of workplace vibration exposure. For machines that use technical means to automatically reduce the amount of unbalance, considering that its vibration will be underestimated, the vibration of such machines The value should be multiplied by a correction factor of 1.3.For grinders equipped with cup-shaped wire brushes, the vibration value is multiplied by a correction factor of 1.6. The value obtained is the type test value, which is used to represent the average value of the upper quartile of the typical vibration of the machine in actual use. however, Actual values sometimes vary greatly, depending on many factors, including the operator, work tasks, and insertion tools or consumables. The machine itself The maintenance status may also be important. In real working conditions, the impact of operators and operating procedures on low-amplitude vibration is particularly serious. because Therefore, the vibration radiation value below 2.5m/s2 is not recommended for evaluation under real working conditions. In this case, it is recommended to use 2.5m/s2 vibration Momentum value to directly evaluate the vibration of the machine. If precise values are required in a specific workplace, it is necessary to perform measurements in accordance with ISO 5349 under this working condition. In fact The measured vibration value under working conditions may be higher or lower than the value obtained with this part of GB/T 26548. Under actual working conditions, the use of excessively unbalanced grinding wheels, baffle wear, or bending of the output shaft are likely to cause higher vibration. Dynamic value. Vibration test method for handheld portable power tools Part 4.Straight shank grinder

1 Scope

This part of GB/T 26548 specifies the test method used to measure the vibration of the handle of a straight shank grinder, and determines that the specified test method is installed. The type test procedure for the vibration of the handle when the wheel inspection machine is running under no load. This part is suitable for driving by compressed air or other methods, using type 1 flat grinding wheel, type 4 double bevel grinding wheel and type 16 (cone with core) Grinding head), 18 type (cylindrical grinding head with core), 18R type (half spherical grinding head with core), 19 type (elliptical cone grinding head with core) with core grinding head and wire brush in Hand-held machines for grinding and surface finishing operations on various materials (see Chapter 5). The measured results are used to compare different forms of the same The amount of vibration of the model machine. This section does not apply to mold grinders where the insert tool is installed on the chuck. Note 1.The typical machines covered by this section are shown in Figure 1~Figure 3. Note 2.In order to avoid confusion between the terms "power tool" and "insertion tool", "machine" is used instead of "power tool" throughout this section.

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. ISO 603-12.1999 Dimensions of consolidated abrasives-Part 12.Deburring and barren grinding wheels for straight grinders (Bonded abrasiveproducts-Dimensions-Part 12.Grindingwheelsfordeburringandfettlingonastraight grinder) ISO 2787.1984 Rotary and impact pneumatic tools performance test (Rotaryandpercussivepneumatictools- Performancetests) ISO 4026.2003 Hexagon socket set screws with flatpoint ISO 4027.2003 Hexagon socket set screws withconepoint ISO 4029.2003 Hexagon socket set screws with cuppoint ISO 5349-1.2001 Mechanical Vibration Measurement and Evaluation of Human Body Exposure to Hand-Transmitted Vibration Part 1.General Requirements (Mechan- icalvibration-Measurementandevaluationofhumanexposuretohand-transmittedvibration-Part 1.Generalrequirements) ISO 5349-2.2001 Mechanical Vibration Measurement and evaluation of human exposure to hand-borne vibration. Part 2.Practical measurement in the workplace Guide (Mechanicalvibration-Measurementandevaluationofhumanexposuretohand-transmittedvi- bration-Part 2.Practicalguidanceformeasurementattheworkplace) ISO 5391.2003 Pneumatic tools and machines-Vocabulary ISO 17066.2007 Hydraulic tools-Vocabulary (Hydraulictools-Vocabulary) ISO 20643.2005 Mechanical vibration Hand-held and hand-guided mechanical vibration evaluation rules (Mechanicalvibration- Hand-heldandhand-guidedmachinery-Principlesforevaluationofvibrationemission) EN755-2.2008 Aluminum and aluminum alloy extruded bars/strips, tubes and profiles Part 2.Mechanical characteristics (Aluminium andaluminiumaloys-Extrudedrod/bar,tubeandprofiles-Part 2.Mechanicalproperties) EN12096.1997 Marking and verification of mechanical vibration vibration radiation value (Mechanicalvibration-Declarationand

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 26548.4-2020_English be delivered?

Answer: Upon your order, we will start to translate GB/T 26548.4-2020_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 26548.4-2020_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 26548.4-2020_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 [email protected]. 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.