JB/T 54259-1999
Product Quality Grading for Measuring Tools and Instruments - Smooth Limit Gauges (Internal Use)
量具量仪产品质量分等 光滑极限量规（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 → 附录A Foreword → 1 Scope → 2 Normative References → 3 Qualified Product → 4 First-Class Product → 5 Premium Product → 6 Grade Evaluation → Annex A
Scope
This standard specifies the quality indicators for qualified products, first-class products, and premium products of smooth limit gauges (hereinafter referred to as gauges) used for inspecting holes and shafts with basic dimensions up to 500 mm and tolerance grades IT6 to IT16 as specified in GB/T 1800-1997 'Limits and Fits - Basis'. This standard is applicable to the batch-by-batch inspection and periodic inspection quality grade evaluation of gauges produced in batches.
本标准规定了适用于检验GB/T 1800—1997《极限与配合 基础》规定的孔与轴基本尺寸至500 mm、公差等级IT6~IT16的光滑极限量规（以下简称量规）的合格品、一等品、优等品的各项质量指标。本标准适用于成批生产的量规逐批检查、周期检查质量等级的评定。
Normative References
Keywords
Application Summary AI generated
Quality inspectors and metrology engineers in the machinery manufacturing industry use this standard to evaluate the quality grades of smooth limit gauges. By classifying gauges into qualified, first-class, and premium products, it ensures the accuracy and reliability of gauges, thereby guaranteeing the fit quality of inspected workpieces. This standard is crucial for controlling product quality in batch production and reducing defect rates.
机械制造行业的质检人员和计量工程师使用该标准，用于对光滑极限量规进行质量等级评定。该标准通过划分合格品、一等品和优等品，确保量规的精度和可靠性，从而保证被检工件的配合质量。它对于控制批量生产中的产品质量、减少废品率具有重要意义。
AI Summary AI generated
This standard JB/T 54259-1999 specifies quality grading requirements for smooth limit gauges used to inspect holes and shafts with basic dimensions up to 500 mm and tolerance grades IT6 to IT16. It classifies gauges into three grades: qualified, first-class, and premium, each with specific criteria for Class A (critical defects), Class B (major defects), and Class C (minor defects), covering dimensional tolerances, form and position tolerances, surface roughness, hardness, and wear resistance. First-class and premium products additionally require taper fit and wear testing. Grade evaluation follows the JB/T 54247 series standards.
本标准JB/T 54259-1999规定了光滑极限量规的质量分等要求，适用于检验基本尺寸至500mm、公差等级IT6至IT16的孔和轴。标准将量规分为合格品、一等品和优等品三个等级，分别规定了A类（致命缺陷）、B类（重缺陷）和C类（轻缺陷）的具体指标，包括尺寸公差、形位公差、表面粗糙度、硬度、耐磨性等要求。一等品和优等品还增加了锥度配合和耐磨试验的附加要求。等级评定依据JB/T 54247系列标准执行。
Key Sentences extracted from text
本标准规定了适用于检验GB/T 1800—1997《极限与配合 基础》规定的孔与轴基本尺寸至500 mm、公差等级IT6~IT16的光滑极限量规（以下简称量规）的合格品、一等品、优等品的各项质量指标。
量规的形状和位置误差应在其尺寸公差带内；其公差为量规尺寸公差的50%。
量规的测量面不应有锈迹、毛刺、黑斑、划痕等明显影响外观和使用质量的缺陷。
钢制量规测量面的硬度应为58~65 HRC。
基本尺寸D＞18~30 mm（精度等级IT8）的量规经过4000 次耐磨试验后，其尺寸仍应在磨损极限内。
This standard specifies the quality indicators for qualified products, first-class products, and premium products of smooth limit gauges (hereinafter referred to as gauges) used for inspecting holes and shafts with basic dimensions up to 500 mm and tolerance grades IT6 to IT16 as specified in GB/T 1800-1997 'Limits and Fits - Basis'.
The form and position errors of the gauge shall be within its dimensional tolerance zone; the tolerance shall be 50% of the gauge dimensional tolerance.
The measuring surfaces of the gauge shall not have defects such as rust, burrs, black spots, scratches, etc., that significantly affect appearance and usage quality.
The hardness of the measuring surfaces of steel gauges shall be 58~65 HRC.
After 4000 wear resistance tests, the dimensions of gauges with basic dimensions D > 18~30 mm (accuracy grade IT8) shall still be within the wear limits.
Standard Timeline
Changes from replaced version:
- 本标准与JB/T 54259—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 54259-94, only re-edited according to relevant regulations.