GB/T 2493-2023 PDF EnglishUS$260.00 · In stock · Download in 9 seconds
GB/T 2493-2023: Test method for rotating strength of abrasive products Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 2493: Historical versions
Similar standardsGB/T 2493-2023: Test method for rotating strength of abrasive products---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2493-2023GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 25.100.70 CCS J 43 Replacing GB/T 2493-2013 Test Method for Rotating Strength of Abrasive Products Issued on. NOVEMBER 27, 2023 Implemented on. JUNE 1, 2024 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative References... 5 3 Terms and Definitions... 5 4 Testing Equipment... 5 5 Test Requirements... 6 6 Test Methods... 7 7 Test Report... 7 Appendix A (Informative) Chucks and Partitions for Rotating Test of Bonded Abrasive Tools... 8 Appendix B (Informative) Chucks and Partitions for Rotating Test of Coated Abrasive Tools... 12 Appendix C (Informative) Chucks and Partitions for Rotating Test of Super- abrasive products... 15 Bibliography... 20ForewordThis Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents. This Document replaced GB/T 2493-2013 Rotation Test of Grinding Wheel Strength. Compared with GB/T 2493-2013, the major technical changes of this Document are as follows besides the structural adjustments and editorial modifications. a) Change the Scope (see Clause 1 of this Clause; Clause 1 of 2013 Edition); b) Add the provision that the raising speed of the rotary test machine shall be uniform (see 4.1.2 of this Edition); c) Change the relative error range of the spindle speed of the rotary test machine (see 4.1.3 of this Edition; 3.2 of the 2013 Edition); d) Change the requirements for the radial runout of the spindle of the rotary test machine (see 4.1.4 of this Edition; 3.3 of the 2013 Edition); e) Add the requirements for recording or displaying the spindle speed of the rotary test machine (see 4.1.6 of this Edition); f) Change the requirements for the tensile strength of the chuck and partition materials and the sleeve materials (see 4.2.1, 5.2 of this Edition; 4.4, 5.3 of the 2013 Edition); g) Change the provision for the installation and clamping of the rotating test of the abrasive products (see 5.1 of this Edition; 5.2 of the 2013 Edition); h) Add the provision for the installation and clamping of the rotating test of abrasive products with special installation methods (see 5.4 of this Edition); i) Change the setting method of the rotating test parameters (see 6.1 of this Edition; 5.1 and 6.1 of the 2013 Edition); j) Add the steps of idling during the rotating test (see 6.2 of this Edition); k) Add the method for handling the breakage of the abrasive products during the rotating test (see 6.6 of this Edition); l) Add the provision for test report (see Clause 7 of this Edition). Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents. This Document was proposed by China Machinery Industry Federation. This Document shall be under the jurisdiction of National Technical Committee for Standardization of Abrasive Tools (SAC/TC 139). Drafting organizations of this Document. Zhengzhou Research Institute for Abrasive & Grinding; White Dove Abrasives Co., Ltd.; Suzhou Far-East Abrasives Co., Ltd.; Beijing Gang Yan Diamond Product Co., Ltd.; Yangquan Zhongjia Abrasives Co., Ltd.; and Zhengzhou Anxin Abrasives Co., Ltd. Chief drafting staffs of this Document. Lv Shenfeng, Bao Hua, Chen Deguang, Si Wenyuan, Liu Yibo, Xu Bangping, Fan Yian, Zhang Liang, Xing Bo, Zhang Huifang, Qi Shoubao, and Luo Xiaoli. The historical editions replaced by this Document are as follows. --- GB 2493-1981 was first-time published in 1981; first-time revised in 1984; second-time revised in 1995; third-time revised in 2013; --- It is fourth-time revised hereby. Test Method for Rotating Strength of Abrasive Products Warning. Hood is strictly prohibited to be opened during the rotating period of the rotary test machine.1 ScopeThis Document specifies the test equipment, test requirements, test methods and test reports for the inspection of the rotating strength of abrasive tools. This Document is applicable to the inspection of the rotating strength of bonded abrasive tools, coated abrasive tools and super-hard abrasive material products.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. GB 2494 Bonded abrasive products - Safety requirements GB/T 16458 Terminology for abrasives and abrasive products GB/T 43134 Super-abrasive products - Safety requirements GB/T 43323 Coated abrasives - General safety requirements3 Terms and DefinitionsFor the purposes of this Document, the terms and definitions given in GB/T 16458 apply.4 Testing Equipment4.1 Rotary test machine 4.1.1 The rotary test machine shall be selected according to the specifications and clamping methods of the abrasive tools. 4.1.2 The rotary test machine shall raise speed uniformly. 4.1.3 The relative error range of the spindle speed of the rotary test machine is ±1.0%. 4.1.5 The rotary test machine shall be equipped with a timing control device to realize that the timing can be automatically started after the spindle speed reaches the setting speed; and the speed can be kept stable within the setting time period; and the speed can be automatically reduced at the end of the setting time. 4.1.6 The rotary test machine shall be able to record or display the maximum speed reached by the spindle or the speed at which the mold breaks during the rotating test. 4.1.7 The noise sound pressure level of the rotary test machine when it is unloaded shall not exceed 85dB(A). 4.1.8 The hood of rotary test machine shall be firm to ensure that the rotating test can be carried out safely. 4.1.9 The rotary test machine shall be calibrated regularly; and the recalibration interval shall not exceed one year. The rotary test machine shall be recalibrated after repair. 4.2 Chucks and partitions for rotating test5 Test Requirements5.1 The abrasives (except for the grinding heads with handles and the flap wheels with shafts) installed on the main shaft of the rotary test machine shall be fastened with chucks at both ends; the grinding heads with handles and the flap wheels with shafts shall be fastened with collets; 5.2 When the hole diameter of the abrasive tool is larger than the outer diameter of the main shaft of the rotary test machine, sleeve shall be allowed to use; and the tensile strength of the sleeve material shall be no less than 415N/mm2. 5.3 During the safety speed test, it is allowed to install multiple abrasives on the main shaft of the rotary test machine at the same time. 5.4 When taking rotating test for the abrasives with a special installation method, it shall be installed according to the installation method when it is used.6 Test Methods6.1 Turn on the power switch of the rotary test machine; and set the rotating strength test parameters (test speed, retention time when the test speed is reached) according to the provisions of GB 2494, GB/T 43134, GB/T 43323 or the provisions of relevant product standards. 6.2 Lock the hood of the rotary test machine; start the rotary test machine to idle; 6.3 Install the abrasive tool on the main shaft of the rotary test machine according to the provisions of Clause 5. 6.4 Lock the hood of the rotary test machine and start the rotary test machine. 6.5 After the rotary test machine stops rotating, open the hood of the rotary test machine and remove the abrasive tool.7 Test ReportThe test report shall at least give the following contents.Appendix A(Informative) Chucks and Partitions for Rotating Test of Bonded Abrasive Tools A.1 The shapes and dimensions of the chuck and partition for grinding wheels with shape code 1 are shown in Figure A.1 and Table A.1, respectively. Figure A.2 and Table A.2 provide another design of the chuck. A.2 For grinding wheels with shape code 1 whose outer diameter and aperture size are not listed in Tables A.1 and A.2, the outer diameter of the chuck shall comply with Formula (A.1); and other dimensions shall refer to the dimension values of chucks with the same outer diameter in Table A.1.Appendix B(Informative) Chucks and Partitions for Rotating Test of Coated Abrasive Tools B.1 The shapes and dimensions of the chucks and partitions for the flap wheels, flap discs, and vulcanized fiber discs (Type A2, Type B2, Type C2) with or without chucks are shown in Figure B.1 and Table B.1 respectively. Figure B.2 and Table B.2 provide another design of the chuck. NOTE. For the model of vulcanized fiber discs, see GB/T 20963.Appendix C(Informative) Chucks and Partitions for Rotating Test of Super-abrasive products C.1 The shapes and dimensions of the chucks and partitions for peripheral grinding wheels (including continuous diamond edging wheels) and diamond circular saw blades with base code 1 are shown in Figure C.1 and Table C.1, respectively. Figure C.2 and Table C.2 provide another design of the chuck. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 2493-2023 be delivered?Answer: The full copy PDF of English version of GB/T 2493-2023 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 2493-2023_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 2493-2023_English will be deemed to be sold to your employer/organization who actually paid 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+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 2493-2023 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 2493-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2493-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 2493-2023?A step-by-step guide to download PDF of GB/T 2493-2023_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 2493-2023". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
