Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Building Materials Federation.
This standard is under the jurisdiction of the National Technical Committee 406 on Non-metallic Mineral Products of Standardization Administration of China (SAC/TC 406).
Drum brake linings for automobile
1 Scope
This standard specifies the terms and definitions, requirements, test methods and inspection rules, as well as marking, packaging, transportation and storage of drum brake linings for automobile (hereinafter referred to “brake lining”).
This standard is applicable to brake linings used in the drum brake of type M, type N and, and type O motor vehicles.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: 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 26739-2011, ISO 6311: 1980, IDT)
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
QC/T 564 Performance requirements and test methods for passenger car service brake
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5620 and GB/T 15089 apply. For the convenience of application, some terms and definitions in GB/T 15089-2001 are listed repeatedly as follows.
3.1
type M
motor vehicles having at least four wheels and used for the carriage of passengers
[GB/T 15089-2001, definition 3.2]
3.1.1
type M1
passenger vehicle accommodating a maximum of 9 seats including the driver's seat
[GB/T 15089-2001, definition 3.2.1]
3.1.2
type M2
passenger vehicle accommodating over 9 seats including the driver's seat, and having a maximum mass not exceeding 5,000 kg
[GB/T 15089-2001, definition 3.2.2]
3.1.3
type M3
passenger vehicle accommodating over 9 seats including the driver's seat, and having a maximum mass exceeding 5,000 kg
[GB/T 15089-2001, definition 3.2.3]
3.2
type N
motor vehicles having at least four wheels and used for the carriage of goods
[GB/T 15089-2001, definition 3.3]
3.2.1
type N1
goods vehicle having a maximum mass not exceeding 3,500 kg
[GB/T 15089-2001, definition 3.3.1]
3.2.2
type N2
goods vehicle having a maximum mass exceeding 3,500 kg but not exceeding 12,000 kg
[GB/T 15089-2001, definition 3.3.2]
3.2.3
type N3
goods vehicle having a maximum mass exceeding 12,000 kg
[GB/T 15089-2001, definition 3.3.3]
3.3
type O
trailers (including semitrailers)
[GB/T 15089-2001, definition 3.4]
3.3.1
type O1
trailers having a maximum mass not exceeding 750 kg
[GB/T 15089-2001, definition 3.4.1]
3.3.2
type O2
trailers having a maximum mass exceeding 750 kg, but not exceeding 3,500 kg
[GB/T 15089-2001, definition 3.4.2]
3.3.3
type O3
trailers having a maximum mass exceeding 3,500 kg, but not exceeding 10,000 kg
[GB/T 15089-2001, definition 3.4.3]
3.3.4
type O4
trailers having a maximum mass exceeding 10,000 kg
[GB/T 15089-2001, definition 3.4.4]
4 Requirements
4.1 Appearance quality
The appearance quality of the brake lining shall meet the requirements of JC/T 2103-2012, 2.2 and 2.3.
4.2 Dimension and tolerance
The basic dimension of the brake lining shall be determined by the purchaser, and the thickness tolerance and width tolerance shall meet the requirements of Table 1 and Table 2, respectively.
Table 1 Dimensional tolerance of thickness In: mm
Basic dimension Dimensional tolerance
≤6.5 0.20
6.5~10 0.30
>10 0.40
Table 2 Dimensional tolerance of width In: mm
Basic dimension Dimensional tolerance
≤30 0.40
30~60 0.60
60~100 0.80
>100 1.00
4.3 Basic requirements relating to health and safety
Basic requirements for brake linings relating to health and safety shall meet the requirements of GB 5763-2018, Clause 4.
4.4 Impact strength
The impact strength of a brake lining shall not be less than 0.30 J/cm2.
4.5 Internal shear strength
The internal shear strength of a brake lining shall not be less than 8.0 MPa.
4.6 Density
The density of a brake lining shall be determined through negotiation between the supplier and the purchaser, and the deviation shall not be greater than the nominal value by ± 10%.
4.7 Break performance
4.7.1 The break performance of drum brake linings for type M1 vehicles shall meet those specified in QC/T 564.
4.7.2 The break performance of drum brake linings for type M2, type M3, type N, and type O vehicles shall meet those specified in QC/T 239.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Building Materials Federation.
This standard is under the jurisdiction of the National Technical Committee 406 on Non-metallic Mineral Products of Standardization Administration of China (SAC/TC 406).
Drum brake linings for automobile
1 Scope
This standard specifies the terms and definitions, requirements, test methods and inspection rules, as well as marking, packaging, transportation and storage of drum brake linings for automobile (hereinafter referred to “brake lining”).
This standard is applicable to brake linings used in the drum brake of type M, type N and, and type O motor vehicles.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: 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 26739-2011, ISO 6311: 1980, IDT)
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
QC/T 564 Performance requirements and test methods for passenger car service brake
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 5620 and GB/T 15089 apply. For the convenience of application, some terms and definitions in GB/T 15089-2001 are listed repeatedly as follows.
3.1
type M
motor vehicles having at least four wheels and used for the carriage of passengers
[GB/T 15089-2001, definition 3.2]
3.1.1
type M1
passenger vehicle accommodating a maximum of 9 seats including the driver's seat
[GB/T 15089-2001, definition 3.2.1]
3.1.2
type M2
passenger vehicle accommodating over 9 seats including the driver's seat, and having a maximum mass not exceeding 5,000 kg
[GB/T 15089-2001, definition 3.2.2]
3.1.3
type M3
passenger vehicle accommodating over 9 seats including the driver's seat, and having a maximum mass exceeding 5,000 kg
[GB/T 15089-2001, definition 3.2.3]
3.2
type N
motor vehicles having at least four wheels and used for the carriage of goods
[GB/T 15089-2001, definition 3.3]
3.2.1
type N1
goods vehicle having a maximum mass not exceeding 3,500 kg
[GB/T 15089-2001, definition 3.3.1]
3.2.2
type N2
goods vehicle having a maximum mass exceeding 3,500 kg but not exceeding 12,000 kg
[GB/T 15089-2001, definition 3.3.2]
3.2.3
type N3
goods vehicle having a maximum mass exceeding 12,000 kg
[GB/T 15089-2001, definition 3.3.3]
3.3
type O
trailers (including semitrailers)
[GB/T 15089-2001, definition 3.4]
3.3.1
type O1
trailers having a maximum mass not exceeding 750 kg
[GB/T 15089-2001, definition 3.4.1]
3.3.2
type O2
trailers having a maximum mass exceeding 750 kg, but not exceeding 3,500 kg
[GB/T 15089-2001, definition 3.4.2]
3.3.3
type O3
trailers having a maximum mass exceeding 3,500 kg, but not exceeding 10,000 kg
[GB/T 15089-2001, definition 3.4.3]
3.3.4
type O4
trailers having a maximum mass exceeding 10,000 kg
[GB/T 15089-2001, definition 3.4.4]
4 Requirements
4.1 Appearance quality
The appearance quality of the brake lining shall meet the requirements of JC/T 2103-2012, 2.2 and 2.3.
4.2 Dimension and tolerance
The basic dimension of the brake lining shall be determined by the purchaser, and the thickness tolerance and width tolerance shall meet the requirements of Table 1 and Table 2, respectively.
Table 1 Dimensional tolerance of thickness In: mm
Basic dimension Dimensional tolerance
≤6.5 0.20
6.5~10 0.30
>10 0.40
Table 2 Dimensional tolerance of width In: mm
Basic dimension Dimensional tolerance
≤30 0.40
30~60 0.60
60~100 0.80
>100 1.00
4.3 Basic requirements relating to health and safety
Basic requirements for brake linings relating to health and safety shall meet the requirements of GB 5763-2018, Clause 4.
4.4 Impact strength
The impact strength of a brake lining shall not be less than 0.30 J/cm2.
4.5 Internal shear strength
The internal shear strength of a brake lining shall not be less than 8.0 MPa.
4.6 Density
The density of a brake lining shall be determined through negotiation between the supplier and the purchaser, and the deviation shall not be greater than the nominal value by ± 10%.
4.7 Break performance
4.7.1 The break performance of drum brake linings for type M1 vehicles shall meet those specified in QC/T 564.
4.7.2 The break performance of drum brake linings for type M2, type M3, type N, and type O vehicles shall meet those specified in QC/T 239.
Contents of GB/T 37224-2018
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging, transportation and storage
