GB/T 4380-2004
ActiveAssessment of departure from roundness--Two-and three-point methods
圆度误差的评定 两点、三点法
Application Summary AI generated
This standard specifies the two-point and three-point measurement methods for assessing roundness deviations in cylindrical workpieces. It is applied in precision manufacturing and quality inspection contexts, such as evaluating the roundness of shafts, bearings, and other rotationally symmetric parts using V-blocks or specialized fixtures. The standard is primarily used in metrology laboratories and production floor inspection to ensure components meet geometric tolerances for proper assembly and function.
Related Standards
GB/T 14495-2009
Geometrical Product Specifications (GPS)- Surface texture: Profile method Roughness comparison specimens for wooden pieces
GB/T 3934-2003
Specification of gauges for general purpose screw threads
GB/T 6091-2004
Knife straight edge
GB/T 9056-2004
Metal ruler
GB/T 9058-2004
Micrometer with prismatically arranged measuring faces
GB/T 8124-2004
Tolerances and general features of gauges for metric trapezoidal screw threads
GB/T 8122-2004
Dial bore gauges
GB/T 6314-2004
Internal micrometers with three-point contact
Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.