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QC/T 242-2024 English PDF (QCT242-2024)
QC/T 242-2024 English PDF (QCT242-2024)
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QC/T 242-2024: Static unbalance requirements and test methods of vehicle wheels
QC/T 242-2024
QC
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
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
GB/T 9239.21 Mechanical Vibration - Rotor Balancing - Part 21: Description and Evaluation
of Balancing Machines
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).
NOTE 1: the unit is (g cm).
NOTE 2: as shown in Figure 1, expressed in Formula (1):
Get QUOTATION in 1-minute: Click QC/T 242-2024
Historical versions: QC/T 242-2024
Preview True-PDF (Reload/Scroll if blank)
QC/T 242-2024: Static unbalance requirements and test methods of vehicle wheels
QC/T 242-2024
QC
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
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
GB/T 9239.21 Mechanical Vibration - Rotor Balancing - Part 21: Description and Evaluation
of Balancing Machines
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).
NOTE 1: the unit is (g cm).
NOTE 2: as shown in Figure 1, expressed in Formula (1):
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