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GB/T 42608-2023 English PDF

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US$854.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42608-2023: Portable chain-saws - Kickback test
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42608-2023	854	Add to Cart	7 days	Portable chain-saws - Kickback test	Valid

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Basic data

Standard ID: GB/T 42608-2023 (GB/T42608-2023)
Description (Translated English): Portable chain-saws - Kickback test
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: B90
Classification of International Standard: 65.060.80
Word Count Estimation: 46,427
Date of Issue: 2023-05-23
Date of Implementation: 2023-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42608-2023: Portable chain-saws - Kickback test

---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 65:060:80 CCSB90 National Standards of People's Republic of China Portable Chainsaw Kickback Test (ISO 9518:2018, Forestrymachinery- 2023-12-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Test method 2 4:1 Principle 2 4:2 Chain saw configuration 2 4:2:1 General 2 4:2:2 Chainsaw family 2 4:2:3 Requirements for guide bars and saw chains used for testing 3 4:3 Determination of CKA devices and materials 3 4:4 Preparation 3 4:4:1 General 3 4:4:2 Measuring Physical Parameters of Chainsaw 3 4:4:3 Dimensional measurement 3 4:4:4 Chainsaw and saw chain preparation 4 4:4:5 Rebound equipment preparation 6 4:4:6 Installation and alignment of the chainsaw 6 4:4:7 Chain saws, clamping devices and support systems 6 4:4:8 Horizontal friction measurement 6 4:4:9 Rotational friction measurement 7 4:4:10 Horizontal and rotational restraint system calibration 8 4:4:11 Impact speed adjustment 9 4:5 Test requirements and procedures 9 4:5:1 Test requirements 9 4:5:2 Rebound test procedure 11 4:5:3 Determination of rebound energy 11 4:5:4 Termination of the test sequence 12 4:5:5 Determination of saw chain braking energy 12 4:5:6 Angle measurement when the chain brake is activated 14 4:5:7 Measurement of saw chain braking stop time 14 4:6 Calculation of bounce angle 15 4:6:1 General 15 4:6:2 Data entry 15 4:6:3 Calculations and results 15 5 Test report 16 Appendix A (Normative) Computer Program Flowchart 17 Appendix B (Normative) Medium Density Fiberboard (MDF) Hardness Test Procedure 28 Appendix C (Informative) Test Record 29 Appendix D (Informative) Chainsaw Center of Gravity and Inertia Measurement 32 D:1 General 32 D:2 Torsion balance measurement inertia 32 D:2:1 Calculation of inertia 32 D:2:2 Determination of the calibration constant (c) of the pendulum 33 D:2:3 Determination of pendulum inertia (Ipen) 34 D:2:4 Examples of determination of c and Ipen 34 D:3 Inertia measurement of chain saws 35 D:3:1 Center of gravity 35 D:3:2 Measurement 35 D:3:3 Calculation of chain saw inertia 35 Appendix E (Informative) Computer Program Inspection Model 36 Reference 41

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 is equivalent to ISO 9518:2018 "Rebound Test for Portable Chain Saws for Forestry Machinery": The following minimal editorial changes have been made to this document: a) In order to coordinate with the existing standard system, change the name of the document to "Portable Chainsaw Kickback Test"; b) For ease of understanding, formula (3) and formula (4) have added the description of "9:8 --- gravitational constant, the unit is cattle per kilogram (N/kg)": Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by the State Forestry and Grassland Administration: This document is under the jurisdiction of the National Forestry Machinery Standardization Technical Committee (SAC/TC61): This document was drafted by: Zhejiang Yate Electric Co:, Ltd:, Zhejiang Pioneer Technology Co:, Ltd:, Zhejiang Zhongma Garden Machinery Co:, Ltd:, Nanjing Chervon Technology Co:, Ltd:, Yongkang Maojin Garden Machinery Co:, Ltd:, Harbin Forestry of the State Forestry and Grassland Bureau Machinery Research Institute, Zhejiang Zhongjian Technology Co:, Ltd:, Zhejiang Sanfeng Industrial Co:, Ltd:, Zhejiang Huangjia Garden Tools Manufacturing Co:, Ltd: Division, Rheinland Technology (Shanghai) Co:, Ltd:, Baoshide Technology (China) Co:, Ltd:, Hangzhou Wanwei Testing Technology Co:, Ltd: The main drafters of this document: Ding Junfeng, Zhu Daoqing, Lai Youzheng, Gao Yang, Zou Yongfeng, Wang Zhendong, Yang Haiyue, Yang Feng, Tang Enchang, Dai Mingyu, Ding Yucai and Bai Yajun: Portable Chainsaw Kickback Test

1 Scope

This document describes the determination of gasoline-powered and electrically powered (including battery-powered), with guide bars and saws The method of rebounding energy of a chain saw (hereinafter referred to as "chain saw"): The test method of this document has been proved to be a method for evaluating and calculating the Accurate measurement method for the rebound angle and rebound energy of a chain saw powered by a gasoline engine with a displacement not exceeding 80cm3: this document Not suitable for evaluation of chainsaws with an engine displacement exceeding 80cm3: In addition, due to the limitation of the structure size of rebound equipment, this document is not applicable to Chainsaws that cut more than 63cm in length: The modification of the method for determining the rebound energy in this document is aimed at making the results more reproducible, based on the experimental results obtained by the previous method: result is still valid:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: Note: GB/T 18960-2023 Portable Chainsaw Vocabulary (ISO 6531:2017, IDT) Note: LY/T 2890-2017 Portable Chainsaw Chain Brake Performance Test Method (ISO 6535:2015, IDT)

3 Terms and Definitions

The terms and definitions defined in ISO 6531 and the following apply to this document: ISO and IEC maintain standardized terminology databases at: ---ISO online browsing platform: https://www:iso:org/obp; 3:1 Guide bar head radius barnoseradius The continuous radius formed from the centerline of the bar to the front end of the bar within an angle of 35° above the centerline: Note: See Figure 1: Figure 1 Radius of guide bar head ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42608-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42608-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42608-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42608-2023_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.