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GB/T 37224-2018 English PDF (GBT37224-2018)

GB/T 37224-2018 English PDF (GBT37224-2018)

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GB/T 37224-2018: Drum brake linings for automobile

This Standard specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation and storage of drum brake linings for automobiles. This Standard applies to drum brake linings for vehicles of categories M, N and O.
GB/T 37224-2018
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 43.040.40
Q 69
Drum brake linings for automobile
ISSUED ON. DECEMBER 28, 2018
IMPLEMENTED ON. NOVEMBER 1, 2019
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements... 7
5 Test methods ... 8
6 Inspection rules ... 9
7 Marking, packaging, transportation and storage ... 11
Drum brake linings for automobile
1 Scope
This Standard specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation and storage of drum brake linings for automobiles (hereinafter referred to as ?€?braking linings?€?).
This Standard applies to drum brake linings for vehicles of categories M, N and O. 2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to this document.
GB/T 2828.1, Sampling procedures for inspection by attributes ?€? Part1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2012, ISO 2859-1.1999, IDT)
GB/T 5620, Road vehicles ?€? Braking of automotive vehicles and their trailers ?€? Vocabulary (GB/T 5620-2002, idt ISO 611.1994)
GB 5763-2018, Brake linings for automobiles
GB/T 15089, Classification of power-driven vehicles and trailers
GB/T 26739, Road vehicles ?€? Brake linings ?€? Test method for internal shear strength of lining material
GB/T 33835, Test method of impact strength for friction material
JC/T 685, Test method for density of friction material
JC/T 2103-2012, Road vehicles ?€? Brake linings friction materials ?€? Visual inspection (JC/T 2103-2012, ISO/PAS 22574.2007, IDT)
QC/T 239, Specifications and bench test methods for commercial vehicle service brake
category N
Power-driven vehicles having at least four wheels and used for the carriage of goods. [GB/T 15089-2001, Definition 3.3]
3.2.1
category N1
Vehicles used for the carriage of goods and having a maximum mass not exceeding 3.5 tonnes.
[GB/T 15089-2001, Definition 3.3.1]
3.2.2
category N2
Vehicles used for the carriage of goods and having a maximum mass exceeding 3.5 tonnes but not exceeding 12 tonnes.
[GB/T 15089-2001, Definition 3.3.2]
3.2.3
category N3
Vehicles used for the carriage of goods and having a maximum mass exceeding 12 tonnes.
[GB/T 15089-2001, Definition 3.3.3]
3.3
category O
Trailers (including semi-trailers).
[GB/T 15089-2001, Definition 3.4]
3.3.1
category O1
Trailers with a maximum mass not exceeding 0.75 tonnes.
[GB/T 15089-2001, Definition 3.4.1]
5.3 Basic requirements concerning health and safety
Basic requirements concerning health and safety shall be tested as specified in Clause 5 of GB 5763-2018.
5.4 Impact strength test
Impact strength of brake linings shall be tested as specified in GB/T 33835. 5.5 In-plane shear strength test
In-plane shear strength of brake linings shall be tested as specified in GB/T 26739. 5.6 Density
Density of brake linings shall be tested as specified in JC/T 685.
5.7 Braking performance test
5.7.1 Braking performance of drum brake lings for vehicles of category M1 shall be tested as specified in QC/T 564.
5.7.2 Braking performance of drum brake linings for vehicles of categories M2, M3, N and O shall be tested as specified in QC/T 239.
6 Inspection rules
6.1 Inspection classification
6.1.1 Exit-factory inspection
The items of exit-factory inspection. appearance quality, dimensions, exit-factory inspection items of GB 5763-2018, impact strength, in-plane shear strength, density. 6.1.2 Type inspection
The items of type inspection include all the items as specified in Clause 4. Type inspection shall be carried out in one of the following cases.
a) when a new product is put into production in commission;
b) when production is resumed after a long term of production halt;
c) when there is any significant change in material or technology, possibly influencing the properties of products;

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