JB/T 54277-1999
Product Quality Grading for Measuring Tools and Instruments - Wall Thickness Micrometer (Internal Use)
量具量仪产品质量分等 壁厚千分尺（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 wall thickness micrometers. This standard is applicable to the quality grade evaluation of wall thickness micrometers produced in batches.
本标准规定了壁厚千分尺的合格品、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壁厚千分尺质量等级的评定。
Normative References
Keywords
Application Summary AI generated
Manufacturers of wall thickness micrometers use this standard to evaluate the quality grade of their products, ensuring compliance with indicators for qualified, first-class, or premium grades. Inspection agencies and users also rely on this standard for acceptance and selection. By defining clear quality tiers, the standard promotes product quality improvement and uniformity in the industry.
壁厚千分尺的制造商使用本标准来评定其产品的质量等级，确保产品符合合格品、一等品或优等品的指标。质检机构和用户也可依据本标准进行验收和选型。该标准通过明确的质量分级，促进了行业产品质量的提升和统一。
AI Summary AI generated
This standard JB/T 54277-1999 specifies quality grading requirements for wall thickness micrometers, classifying products into three grades: qualified, first-class, and premium. Qualified products must meet basic accuracy and appearance requirements; first-class products require a 15% reduction in indication error, while premium products require a 25% reduction plus additional life tests and marking process requirements. The standard applies to batch-produced wall thickness micrometers for quality evaluation, references standards such as GB/T 6312, and is under the jurisdiction of the National Technical Committee for Standardization of Measuring Tools and Instruments.
本标准JB/T 54277-1999规定了壁厚千分尺的质量分等要求，将产品分为合格品、一等品和优等品三个等级。合格品需满足基本精度和外观要求，一等品在示值误差上压缩15%，优等品压缩25%并增加寿命试验和刻线工艺要求。标准适用于成批生产的壁厚千分尺质量评定，引用GB/T 6312等标准，由全国量具量仪标准化技术委员会归口。
Key Sentences extracted from text
本标准规定了壁厚千分尺的合格品、一等品和优等品的各项质量指标。
壁厚千分尺的示值误差：Ⅰ型不大于0.004 mm；Ⅱ型不大于0.008 mm。
测微螺杆移动应平稳，无卡滞现象，其轴向和径向间隙应不大于0.01 mm。
将壁厚千分尺合格品的示值误差压缩15%。
壁厚千分尺测微螺杆经30 万次寿命试验后，其示值误差应不超过一等品规定的要求；棘轮经150万次寿命试验后，其测力和测力变化应不超过规定的要求，其合格率不低于67%。
This standard specifies the quality indicators for qualified products, first-class products, and premium products of wall thickness micrometers.
Indication error of wall thickness micrometer: Type I not greater than 0.004 mm; Type II not greater than 0.008 mm.
The movement of the micrometer screw shall be smooth, without sticking, and its axial and radial clearance shall not be greater than 0.01 mm.
Compress the indication error of the qualified wall thickness micrometer by 15%.
After 300,000 cycles of life test on the micrometer screw, its indication error shall not exceed the requirements specified for first-class products; after 1.5 million cycles of life test on the ratchet, its measuring force and measuring force variation shall not exceed the specified requirements, and the pass rate shall not be less than 67%.
Standard Timeline
Changes from replaced version:
- 本标准与JB/T 54277—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 54277-94, only re-edited according to relevant regulations.