1.1 本试验方法涵盖了最终驱动桥润滑油在高速和冲击条件下抗划伤性能的测定。该测试方法通常被称为L-42测试。 2 1.2 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准。 1.2.1 例外情况- 为所有参数提供了SI单位，除非没有直接等效的单位，如螺纹、国家管螺纹/直径、管道尺寸和单一来源设备供应商的单位。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。具体警告信息在章节中给出 4 和 7 . 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 最终驱动桥经常受到严重的服务，其中它们遇到高速冲击扭矩条件，其特征是突然加速和减速。这种严重的维修会导致齿圈和小齿轮表面出现划痕。本试验方法测量终传动润滑剂的抗划伤性能。 5.2 以下文件中使用或引用了该试验方法: 5.2.1 美国石油协会（API）出版物1560。 7 5.2.2 SAE J308和SAE J2360。

1.1 This test method covers the determination of the anti-scoring properties of final drive axle lubricating oils when subjected to high-speed and shock conditions. This test method is commonly referred to as the L-42 test. 2 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.2.1 Exceptions— SI units are provided for all parameters except where there is no direct equivalent such as the units for screw threads, National Pipe Threads/diameters, tubing size, and single source equipment suppliers. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning information is given in Sections 4 and 7 . 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Final drive axles are often subjected to severe service where they encounter high speed shock torque conditions, characterized by sudden accelerations and decelerations. This severe service can lead to scoring distress on the ring gear and pinion surface. This test method measures anti-scoring properties of final drive lubricants. 5.2 This test method is used or referred to in the following documents: 5.2.1 American Petroleum Institute (API) Publication 1560. 7 5.2.2 SAE J308 and SAE J2360.