GB/T 3672.2-2002 in English

《GB/T 3672.2-2002橡胶制品的公差 第2部分:几何公差》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC3（全国橡胶与橡胶制品标准化技术委员会密封制品分会）执行，主管部门为中国石油和化学工业联合会。
本标准对模压和压出的密实橡胶制品，包括带金属骨架的这类制品规定了下列几何公差：――平面度公差；――平行度公差；――垂直度公差；――同轴度公差；――位置度公差。本标准规定的公差适用于硫化橡胶制品，也适用于由热塑性橡胶制成的产品。

1 Scope

This standard specifies the following geometrical tolerances for moulded and extruded solid rubber products, including those with metal inserts:

——flatness tolerance;

——parallelism tolerance;

——perpendicularity tolerance;

——coaxiality tolerance;

——positional tolerance.

The tolerances are primarily intended for use with vulcanized rubber but may also be suitable for products made of thermoplastic rubbers.

2 Normative references

The following standards contain provision which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited were valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.

GB/T 2941-1991 Rubber - Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces (eqv ISO 471: 1995)
GB/T 5723-1993 Rubber, vulcanized or thermoplastic－Determination of dimensions of test pieces and products for test purposes (eqv ISO 4648: 1991)
GB/T 6031-1998 Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD) (idt ISO 48: 1994)
ISO 1101: 1983 Technical drawings - Geometrical tolerancing - Tolerancing of form, orientation, location and run-out - Generalities, definitions, symbols, indications on drawings1)）

Foreword i
ISO Foreword
1 Scope
2 Normative references
3 Classes of tolerances
4 Measurement of dimensions
5 Flatness tolerance
6 Parallelism tolerance
7 Perpendicularity tolerance
8 Coaxiality tolerance
9 Positional tolerance