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QC/T 269-1999 English PDF (QCT269-1999)

QC/T 269-1999 English PDF (QCT269-1999)

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QC/T 269-1999: Limit deviation of dimensions of automobile parts without tolerance indicated

This standard specifies the limit deviation of dimensions without tolerances indicated, for dimension elements, which are formed by casting in automotive product parts drawings. This standard is applicable to the limit deviation of dimensions without tolerances indicated, for automotive product parts drawings of sand casting, metal casting, low pressure casting, investment casting, pressure casting.
QC/T 269-1999
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing ZB T04 006.4-89
Limit deviation of dimensions of automobile parts without
tolerance indicated
APPROVED ON: MARCH 15, 1999
IMPLEMENTED ON: MARCH 15, 1999
Issued by: State Administration of Machinery Industry
Table of Contents
1 Subject content and scope of application ... 3
2 Normative references ... 3
3 Terminology ... 3
4 Limit deviation of casting dimensions without tolerance indicated ... 3 Additional information ... 6
Limit deviation of dimensions of automobile parts without
tolerance indicated
1 Subject content and scope of application
This standard specifies the limit deviation of dimensions without tolerances indicated, for dimension elements, which are formed by casting in automotive product parts drawings.
This standard is applicable to the limit deviation of dimensions without tolerances indicated, for automotive product parts drawings of sand casting, metal casting, low- pressure casting, investment casting, pressure casting.
2 Normative references
GB/T 6414 Dimensional tolerances for castings
3 Terminology
The maximum outline size of the casting (referred to as the maximum size): It refers to the maximum size of the geometry of the included part.
4 Limit deviation of casting dimensions without tolerance
indicated
4.1 The limit deviation of sand casting dimensions, without tolerance indicated, shall be as specified in Table 1.
4.2 The limit deviation of dimensions of metal mold and low-pressure casting, without tolerance indicated, shall be as specified in Table 2.
4.3 The limit deviation of dimensions of investment casting, without tolerance indicated, shall be as specified in Table 3.
4.4 The limit deviation of die casting dimensions, without tolerance indicated, is as specified in Table 4.
4.5 The mis-box value, which is not indicated on the drawing, must be within the dimensional tolerance of the casting.

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