GB/T 13916-2013Unnoted tolerance of shape and position for stamping parts (English PDF)

Foreword

This Standard was drafted in accordance with the rules in GB/T 1.1-2009.

This Standard serves as a replacement of GB/T 13916-2002 Unnoted Tolerance of

Shape and Position for Stampings. In comparison with GB/T 13916-2002, other than

editorial modifications, there are several main technical changes as follows.

---The English translation of the title of this Standard is modified (please refer to

the front cover; the front cover in Version 2002);

---The grade of tolerance is modified (please refer to Chapter 2; Chapter 2 in Version 2002);

---Graphic annotation is modified (please refer to Figure 2 in 3.2; Figure 2 in Version 2002);

---Unnoted tolerance of cylindricity is modified (please refer to 3.4; 3.4 in Version 2002);

---Unnoted tolerance of parallelism is modified (please refer to 3.5; 3.5 in Version 2002);

---A group of tolerance values is deleted (please refer to Grade-5 tolerance in 3.1 in Version 2002);

---The representation method for the adoption of this Standard is added (please refer to Chapter 4).

This Standard was proposed by and shall be under the jurisdiction of National

Technical Committee 74 on Forging of Standardization Administration of China (SAC/TC 74).

The drafting organization of this Standard. YTO (Luoyang) Flag Auto-body Co., Ltd.

The main drafters of this Standard. Dailu, Zhujing, Li Junying, Li Gaoxin.

The issuance of the previous versions of the standard being replaced by this Standard is as follows.

---GB/T 13916-1992, GB/T 13916-2002.

1 Scope

This Standard stipulates the unnoted tolerance grade and numerical value of

straightness, flatness, concentricity and symmetry for metal stamping parts; it also

stipulates the unnoted tolerance of roundness, cylindricity, parallelism, perpendicularity

and gradient for metal stamping parts.

This Standard is applicable to stamping parts for metal plates.

2 Grade of Tolerance

Unnoted tolerance of straightness, flatness, concentricity and symmetry for stamping

parts shall be divided into four grades, namely, f (fine), m (middle), c (coarse), v (very coarse).