QC/T 243-2018 Flatness requirements and test methods of wheel attachment face
1 Scope
1.1 This standard specifies the flatness requirements and test methods for the mounting face of vehicle wheels.
1.2 This standard is applicable to vehicle wheels.
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 of the referenced document (including any amendments) applies.
GB/T 2933 Vocabulary, designation and marking of wheels and rims for pneumatic tires
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 2933 apply.
4 Requirements
4.1 Flatness requirements for the mounting face of commercial vehicle wheels
The flatness requirements for the mounting face of commercial vehicle wheels are given in Table 1, and the measurement area requirements for the mounting face are given in Table 2.
Table1 Flatness requirements for the mounting face of commercial vehicle wheels mm
Material Flatness requirement
Steel ≤0.40
Light alloy ≤0.20
Table 2 Measurement area requirements for the mounting face of commercial vehicle wheels mm
Number of bolt holes Pitch circle diameter of bolt hole Minimum measurement area diameter (inner) Minimum measurement area diameter (outer)
4.2 Flatness requirements for the mounting face of passenger car wheels
The flatness requirements for the mounting face of passenger car wheels are given in Table 3.
Table3 Flatness requirements for the mounting face of passenger car wheels mm
Material Flatness requirement
Steel ≤0.15
Light alloy ≤0.10 (center concave)
5 Samples
The sample to be tested shall be a new wheel that has completed all processing steps and has not been tested or used.
6 Test methods
6.1 Gap Method I
6.1.1 Measuring tools
The measuring tools consist of a flat plate (annular or cross-shaped) and feeler gauges. The
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Samples
6 Test methods
7 Conformity assessment
