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GB/T 14234-1993Surface roughness for plastic parts (English PDF)

塑料件表面粗糙度

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 4, 1993

Implementation date

December 1, 1993

Scope

GB/T 14234-1993 is the English-translated version of 塑料件表面粗糙度.

GB/T 14234-1993 is the Chinese standard "Surface roughness for plastic parts". Its scope clause reads: This standard specifies the surface roughness parameters, parameter values and general rules for the requirements for plastic parts.

It is mainly applicable to the surface roughness for plastic parts of electronics, aerospace products, instrumentation and apparatus as well as other products, and is a reference for the surface roughness for plastic parts of other products. Its clauses include subject content and applicable scope; terms and symbols.

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Document preview — GB/T 14234-1993

National Standard of the People's Republic of China

ICS: 83.140
Classification: G 31

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Subject content and applicable scope
2 Normative references
3 Terms and symbols
4 Surface roughness parameters
5 Surface roughness parameter values
6 Sampling length and evaluation length
7 General rules for surface roughness requirements
Annex A Additional parameters for evaluating surface roughness and their values (Supplement)

1 Subject content and applicable scope

This standard specifies the surface roughness parameters, parameter values and general rules for the requirements for plastic parts.

2 Normative references

GB 131 Mechanical drawings - Surface roughness symbols and methods of indicating

GB 1031 Surface roughness parameters and their values

GB 3505 Surface roughness - Terminology - Surface and its parameters

3 Terms and symbols

Terms used in this standard, such as arithmetical mean deviation of the profile Ra, ten point height of irregularities Rz, maximum height of the profile Ry, sampling length l, evaluation length ln, mean spacing of the profile irregularities Sm, mean spacing of local peaks of the profile S, profile bearing length ratio tp, profile section level c, etc., are in accordance with those specified in GB 3505.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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