GB/T 2493-2023 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 2493-2023 | English | 260 |
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Test method for rotating strength of abrasive products
| Valid |
| GB/T 2493-2013 | English | 150 |
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Rotation test of grinding wheel strength
| Obsolete |
| GB/T 2493-1995 | English | 95 |
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Rotation test of grinding wheel strength
| Obsolete |
| GB 2493-1984 | English | RFQ |
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Methods for determination of revolving strength of grinding wheels
| Obsolete |
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GB/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/GBT2493-2023
GB
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 Contents
Foreword... 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... 20
Foreword
This 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 Scope
This 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 References
The 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 requirements
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 16458 apply.
4 Testing Equipment
4.1 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 test
5 Test Requirements
5.1 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 Methods
6.1 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 Report
The 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.
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