GB/T 1804-2000: General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications

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Scope

This Standard specifies tolerance classes and limit deviations of general tolerances for
linear and angular dimensions without individual tolerance indications.
This Standard applies to the dimensions of parts that are produced by metal removal,
it also applies to the dimensions of parts that are formed from sheet metal. The
dimensions of non-mental materials or other process method may also reference to
this Standard.
This Standard only applies for the following dimensions which do not have an individual
tolerance indication.
a) linear dimensions (e.g. external sizes, internal sizes, step sizes, diameters,
radius, distances, rounding radius and chamfer heights);
b) angular dimensions, including angular dimensions usually not indicated, e.g.
right angles (90°); excluding the angles as mentioned in GB/T 1184, or angles
of uniform polygons;
c) linear and angular dimensions produced by machining assembled parts.
This Standard does not apply for the following dimensions.
a) linear and angular dimensions which are covered by reference to other
standards on general tolerances;
b) auxiliary dimensions indicated in brackets;
c) theoretically exact dimensions indicated in rectangular frames.

Basic Data

Standard ID	GB/T 1804-2000 (GB/T1804-2000)
Description (Translated English)	General tolerances Tolerances for linear and angular dimensions without individual tolerance indications
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J04
Classification of International Standard	17.040.10
Word Count Estimation	9,911
Date of Issue	2000-07-24
Date of Implementation	2000-12-01
Older Standard (superseded by this standard)	GB/T 1804-1992; GB/T 11335-1989
Quoted Standard	GB/T 1800.1-1997; GB/T 1184-1996; GB/T 4249-1996; GB/T 6403.4-1986
Adopted Standard	ISO 2768-1-1989, MOD
Issuing agency(ies)	State Quality and Technical Supervision
Summary	This standard specifies the satellite broadcast system integration downconverter technical requirements and methods of measurement. For the same measurement uncertainty can ensure that any equivalent measurement methods may also be used. Dispute should be based on this standard shall prevail. This standard applies to radio and television satellite broadcast system integrated downconverter development, production, use, and operation and maintenance.