QC/T 242-2024 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| QC/T 242-2024 | English | 125 |
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Static unbalance requirements and test methods of vehicle wheels
| Valid |
| QC/T 242-2014 | English | 110 |
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Static unbalance requirements and test methods of vehicle wheels
| Obsolete |
| QC/T 242-2004 | English | 199 |
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Unbalance requirements and test methods of vehicle wheels
| Obsolete |
| QC/T 242-1997 | English | 199 |
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2 days
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(Car wheel unbalance requirements and test methods)
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: QC/T 242-2024
QC/T 242-2024: Static unbalance requirements and test methods of vehicle wheels---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/QCT242-2024
QC
AUTOMOTIVE INDUSTRY STANDARD
ICS 43.040.50
CCS T 22
Replacing QC/T 242-2014
Static Unbalance Requirements and Test Methods of Vehicle
Wheels
Issued on. JULY 19, 2024
Implemented on. JANUARY 1, 2025
Issued by. Ministry of Industry and Information Technology of the People’s
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Test Samples... 6
5 Test Equipment... 6
6 Requirements for the Amount of Static Unbalance... 6
7 Test Methods... 7
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for QC/T 242-2014 Static Unbalance Requirements and
Test Methods of Vehicle Wheels. In comparison with QC/T 242-2014, apart from structural
adjustments and editorial modifications, the main technical changes are as follows.
a) The terms and definitions are modified (see Chapter 3; Chapter 3 of Version 2014);
b) The requirements for valve configuration for the test of light alloy wheels are
modified (see Chapter 4; Chapter 4 of Version 2014);
c) The requirements for the test equipment are added (see Chapter 5);
d) The requirements for the amount of static unbalance of light alloy wheels on
commercial vehicles are modified (see Chapter 6; Chapter 5 of Version 2014);
e) The test methods are modified (see Chapter 7; Chapter 6 of Version 2014).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by and shall be under the jurisdiction of National Technical
Committee 114 on Auto of Standardization Administration of China (SAC/TC 114).
The drafting organizations of this document. Baoding Lizhong Wheel Manufacturing Co., Ltd.;
Dongfeng Motor Chassis Systems Co., Ltd.; Beijing Shuangyuan Tianheng Testing Co., Ltd.;
Xingmin Lichi Co., Ltd.; CITIC Dicastal Co., Ltd.; Zhejiang Jingu Co., Ltd.; Changchun
FAWAY Automobile Components Co., Ltd. Wheel Branch Company; Zhejiang Wanfeng Auto
Wheels Co., Ltd.; Dare Wheel Manufacturing Co., Ltd.; Jiangsu POMLEAD Co., Ltd.;
Zhengxing Wheel Group Co., Ltd.; Jiangsu KAITE Automobile Parts Co., Ltd.
The main drafters of this document. Zhang Jianliang, Ma Jianhua, Pan Xiaoyu, Guo Weijian,
Chen Yunjing, Wei Chenguang, He Genglei, Cheng Xiaoqiang, Ye Yanfei, Zhang Shijiang, Mao
Qiuxian, He Guoyuan, Wan Jinhua, Ning Yuncheng, Li Ping, Li Wenjian.
The issuing of the previous versions.
---Firstly issued in 1997 as QC/T 242-1997, firstly revised in 2004 and secondly revised
in 2014;
---This is the third revision.
Static Unbalance Requirements and Test Methods of Vehicle
Wheels
1 Scope
This document specifies the requirements and test methods for the static unbalance of vehicle
wheels.
This document is applicable to the determination of static unbalance of vehicle wheels.
2 Normative References
The content of the following documents constitutes indispensable clauses of this document
through normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2933 Wheels and Rims for Pneumatic Tyres - Vocabulary, Designation and Marking
GB/T 6444 Mechanical Vibration - Balancing - Vocabulary
3 Terms and Definitions
The terms and definitions defined in GB/T 2933 and GB/T 6444, and the following are
applicable to this document.
3.1 mass eccentricity
The distance from the center of mass of the wheel to the centerline of the wheel.
3.2 amount of static unbalance
The product of the wheel mass multiplied by the mass eccentricity (3.1).
3.5 angle of static unbalance
The circumferential angle between the center of mass of the static unbalance mass (3.4) and the
specified datum point.
4 Test Samples
4.1 The test samples shall be new and unused wheels.
5 Test Equipment
The selection and evaluation of balancing machines shall comply with the provisions of GB/T
9239.21.
6 Requirements for the Amount of Static Unbalance
6.1 Wheels of Passenger Vehicles
The requirements for the amount of static unbalance of passenger vehicle wheels shall not be
greater than those specified in Table 1.
Table 1 -- Amount of Static Unbalance of Passenger Vehicle Wheels
6.2 Wheels of Commercial Vehicles
7 Test Methods
7.1 In accordance with the wheel model, enter the necessary parameters. If necessary, install
the valve (equivalent replacement or set the automatic compensation value of the equipment).
7.2 Install the wheels and start the balancing machine, so as to test the amount of static
unbalance (or static unbalance mass) and the angle of static unbalance of the wheels.
7.3 After the wheels stop rotating, the test ends. If necessary, make a key mark at the position
QC/T 242-2024
QC
AUTOMOTIVE INDUSTRY STANDARD
ICS 43.040.50
CCS T 22
Replacing QC/T 242-2014
Static Unbalance Requirements and Test Methods of Vehicle
Wheels
Issued on. JULY 19, 2024
Implemented on. JANUARY 1, 2025
Issued by. Ministry of Industry and Information Technology of the People’s
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 4
4 Test Samples... 6
5 Test Equipment... 6
6 Requirements for the Amount of Static Unbalance... 6
7 Test Methods... 7
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for QC/T 242-2014 Static Unbalance Requirements and
Test Methods of Vehicle Wheels. In comparison with QC/T 242-2014, apart from structural
adjustments and editorial modifications, the main technical changes are as follows.
a) The terms and definitions are modified (see Chapter 3; Chapter 3 of Version 2014);
b) The requirements for valve configuration for the test of light alloy wheels are
modified (see Chapter 4; Chapter 4 of Version 2014);
c) The requirements for the test equipment are added (see Chapter 5);
d) The requirements for the amount of static unbalance of light alloy wheels on
commercial vehicles are modified (see Chapter 6; Chapter 5 of Version 2014);
e) The test methods are modified (see Chapter 7; Chapter 6 of Version 2014).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by and shall be under the jurisdiction of National Technical
Committee 114 on Auto of Standardization Administration of China (SAC/TC 114).
The drafting organizations of this document. Baoding Lizhong Wheel Manufacturing Co., Ltd.;
Dongfeng Motor Chassis Systems Co., Ltd.; Beijing Shuangyuan Tianheng Testing Co., Ltd.;
Xingmin Lichi Co., Ltd.; CITIC Dicastal Co., Ltd.; Zhejiang Jingu Co., Ltd.; Changchun
FAWAY Automobile Components Co., Ltd. Wheel Branch Company; Zhejiang Wanfeng Auto
Wheels Co., Ltd.; Dare Wheel Manufacturing Co., Ltd.; Jiangsu POMLEAD Co., Ltd.;
Zhengxing Wheel Group Co., Ltd.; Jiangsu KAITE Automobile Parts Co., Ltd.
The main drafters of this document. Zhang Jianliang, Ma Jianhua, Pan Xiaoyu, Guo Weijian,
Chen Yunjing, Wei Chenguang, He Genglei, Cheng Xiaoqiang, Ye Yanfei, Zhang Shijiang, Mao
Qiuxian, He Guoyuan, Wan Jinhua, Ning Yuncheng, Li Ping, Li Wenjian.
The issuing of the previous versions.
---Firstly issued in 1997 as QC/T 242-1997, firstly revised in 2004 and secondly revised
in 2014;
---This is the third revision.
Static Unbalance Requirements and Test Methods of Vehicle
Wheels
1 Scope
This document specifies the requirements and test methods for the static unbalance of vehicle
wheels.
This document is applicable to the determination of static unbalance of vehicle wheels.
2 Normative References
The content of the following documents constitutes indispensable clauses of this document
through normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2933 Wheels and Rims for Pneumatic Tyres - Vocabulary, Designation and Marking
GB/T 6444 Mechanical Vibration - Balancing - Vocabulary
3 Terms and Definitions
The terms and definitions defined in GB/T 2933 and GB/T 6444, and the following are
applicable to this document.
3.1 mass eccentricity
The distance from the center of mass of the wheel to the centerline of the wheel.
3.2 amount of static unbalance
The product of the wheel mass multiplied by the mass eccentricity (3.1).
3.5 angle of static unbalance
The circumferential angle between the center of mass of the static unbalance mass (3.4) and the
specified datum point.
4 Test Samples
4.1 The test samples shall be new and unused wheels.
5 Test Equipment
The selection and evaluation of balancing machines shall comply with the provisions of GB/T
9239.21.
6 Requirements for the Amount of Static Unbalance
6.1 Wheels of Passenger Vehicles
The requirements for the amount of static unbalance of passenger vehicle wheels shall not be
greater than those specified in Table 1.
Table 1 -- Amount of Static Unbalance of Passenger Vehicle Wheels
6.2 Wheels of Commercial Vehicles
7 Test Methods
7.1 In accordance with the wheel model, enter the necessary parameters. If necessary, install
the valve (equivalent replacement or set the automatic compensation value of the equipment).
7.2 Install the wheels and start the balancing machine, so as to test the amount of static
unbalance (or static unbalance mass) and the angle of static unbalance of the wheels.
7.3 After the wheels stop rotating, the test ends. If necessary, make a key mark at the position
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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