GBT14486-93标准（英文版）.doc

UDC /.073
G 31
GB/T 14486-93
National Standard of the People’s
Republic of China
GB/T 14486-93
Dimensional Tolerances for
Plastic Engineering Moulded Plastic Pats
Issue Date: June 15th, 1993 Implementation Date: May 1st, 1994
Issued by China State Bureau of Technical Supervision
National Standard of the People’s Republic of China
GB/T 14486-93
Dimensional Tolerances for Plastic
Engineering Moulded Plastic Pats
Contents and Scope
This standard specifies the dimensional tolerance for thermosetting and thermoplastic plastic engineering moulded plastic pats.
This standard is applicable to all plastic engineering moulded plastic pats of injection, compression, transfer and casting moulding, but not applicable to those of extrusion and blow moulding, sinter and foam products.
Normative References
GB 1800 Tolerance and Fit-General information-standard tolerance and fundamental tolerance.
Fundamental Specification
Code, Grade and Value of Dimensional Tolerance for Moulded Plastic Pats
Code of dimensional tolerance for moulded plastic pats is MT, tolerance grade is divided into 7 grades, and tolerance values of various grades are in Table 1.
Selection of Tolerance Grade
See table 2 for selection of tolerance grade for moulded plastic pats mon materials. See Annex A (Supplementary) for selection method of tolerance grade for moulded plastic pats of material