JB/T 54280-1999
Product Quality Grading for Measuring Tools and Instruments - Depth Micrometers (Internal Use)
量具量仪产品质量分等 深度千分尺（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 合格品 → 4 一等品 → 5 优等品 → 6 等级评定 Foreword → 1 Scope → 2 Normative References → 3 Qualified Product → 4 First-Class Product → 5 Premium Product → 6 Grade Evaluation
Scope
This standard specifies the quality indicators for qualified products, first-class products, and premium products of depth micrometers. This standard is applicable to the evaluation of quality grades for batch-produced depth micrometers.
本标准规定了深度千分尺的合格品、一等品和优等品的各项质量指标。本标准适用于成批生产的深度千分尺质量等级的评定。
Normative References
Keywords
Application Summary AI generated
Manufacturers of depth micrometers use this standard to classify product quality grades, ensuring compliance with different quality requirements. Quality inspection departments and customers rely on this standard for product acceptance and evaluation. It helps improve product consistency and reliability, fostering market competition.
深度千分尺的制造企业使用本标准来划分产品的质量等级，确保产品符合不同等级的质量要求。质检部门和用户依据本标准对产品进行验收和评价。该标准有助于提升产品质量的一致性和可靠性，促进市场竞争。
AI Summary AI generated
This standard specifies quality indicators for qualified, first-class, and premium grades of depth micrometers, including requirements for indication error, appearance, interaction, hardness, surface roughness, measuring force, and zero-setting error. Qualified products must meet basic requirements of GB/T 1218; first-class products add pitch error and cleanliness criteria; premium products require stricter pitch error, cleanliness, and life test pass rates. The standard is used for quality grade evaluation of batch-produced products.
本标准规定了深度千分尺的合格品、一等品和优等品的质量指标，包括示值误差、外观、相互作用、硬度、表面粗糙度、测量力、对零误差等要求。合格品需满足GB/T 1218的基本要求；一等品在此基础上增加螺距误差和清洁度要求；优等品则要求更严格的螺距误差、清洁度及寿命试验合格率。标准适用于成批生产产品的质量等级评定。
Key Sentences extracted from text
深度千分尺的示值误差应不大于表1的规定。
测微螺杆移动应平稳，无阻滞现象，其轴向和径向间隙应不大于0.01 mm。
深度千分尺测量杆测量面和底板基准面的硬度应不低于766 HV（≈62 HRC）。
深度千分尺的测量力为3~6 N。
测微螺杆的螺距误差不应大于0.003 mm。
The indication error of the depth micrometer shall not exceed the values specified in Table 1.
The movement of the micrometer screw shall be smooth without sticking, and its axial and radial clearance shall not exceed 0.01 mm.
The hardness of the measuring face of the measuring rod and the base surface of the depth micrometer shall not be less than 766 HV (≈62 HRC).
The measuring force of the depth micrometer shall be 3 to 6 N.
The pitch error of the micrometer screw shall not exceed 0.003 mm.
Standard Timeline
Changes from replaced version:
- 本标准与JB/T 54280—94的技术内容一致，仅按有关规定重新进行了编辑。
- The technical content of this standard is consistent with JB/T 54280-94, only re-edited according to relevant regulations.