GB/T 40742.4-2021
Geometrical product specifications (GPS)—Geometrical precision verification—Part 4：Evaluation of dimension and geometrical error，discriminant pattern of minimum zone (English Version)

Standard No.

GB/T 40742.4-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 40742.4-2021

Scope

This document specifies the dimensional acceptance and evaluation operations for geometric errors. For different target tasks (offline, online inspection), product size qualification assessment, geometric error assessment methods, related default principles and minimum area discrimination methods for shape error, direction error and position error are given. This document is suitable for the detection and verification of geometric features such as size, shape, direction, position, and runout of products.

GB/T 40742.4-2021 Referenced Document

• GB/T 16671 Geometrical product specifications (GPS)—Geometrical tolerancing—Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)
• GB/T 17851 Geometrical product specifications (GPS)—Geometrical tolerancing—Datums and datum systems*， 2022-12-30 Update
• GB/T 1957-2006 Tolerances and general features for plain limin gauges
• GB/T 1958 Geometrical Product Specifications(GPS)—Geometrical tolerance—Verification
• GB/T 3177-2009 Geometrical Product Specifications(GPS).Inspection of plain workpiece sizes
• JJF 1001 General Terms in Metrology and Their Definitions

GB/T 40742.4-2021 history

• 2021 GB/T 40742.4-2021 Geometrical product specifications (GPS)—Geometrical precision verification—Part 4：Evaluation of dimension and geometrical error，discriminant pattern of minimum zone

GB/T 40742.4-2021 -All Parts