JB/T 51079-1999

Manufacturers, testing organizations, and quality supervision departments of tractors, internal combustion engines, agricultural transport vehicles, and construction machinery use this standard. They apply it to grade and evaluate the quality of starter products, ensuring they meet requirements for qualified, first-class, or superior grades. This standard is crucial for ensuring starter durability, performance, and reliability, helping to raise the overall quality level in the industry.

拖拉机、内燃机、农用运输车和工程机械的制造商、检测机构以及质量监督部门使用该标准。他们用它来对起动机产品进行质量分等和等级评定，确保产品达到合格品、一等品或优等品的要求。该标准对于保证起动机的耐久性、工作性能和可靠性至关重要，有助于提升行业整体质量水平。

This standard specifies the product quality grading requirements for starters used in tractors and internal combustion engines, classifying products into three grades: qualified, first-class, and superior. It details technical indicators and test methods for durability, performance, continuous running, overspeed, power, specific power, vibration, shock, voltage withstand, temperature change, damp heat, splash-proof, interchangeability, mounting dimensions, appearance, and coatings. Inspection rules follow the GB/T 2828 sampling plan with defect classification. The standard provides a unified basis for quality inspection and grade evaluation of starters.

本标准规定了拖拉机、内燃机用起动机的产品质量分等要求，将产品分为合格品、一等品和优等品三个等级。标准详细列出了耐久性、工作性能、连续运转、超速、功率、比功率、振动、冲击、耐电压、温度变化、湿热、防溅、互换性、安装尺寸、外观及镀层漆层等多项技术指标及其试验方法。检验规则采用GB/T 2828的抽样方案，按缺陷分类进行判定。该标准为起动机的质量检测和等级评定提供了统一依据。