1.1 本试验方法描述了一种实验室技术，用于使用测量和记录扭矩的仪器攻丝机评估金属去除液的相对性能。 1.1.1 该方法适用于所有丝锥类型、加工速度和可制成试件的合金。可以在不同的操作条件或各种类型的液体之间进行比较，包括直馏油和乳化油、半合成油和合成油（见分类 D2881 ). 1.2 以国际单位制表示的数值应视为标准值。 1.2.1 例外情况- 丝锥螺纹的单位M6为公制螺纹单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 该试验方法可用于预测金属加工液（MWF）的比较润滑性能。 5.1.1 预计产生较低扭矩或更高效率的流体具有更好的加工特性。 5.2 该方法适用于可制造成试件的所有丝锥类型、加工速度、合金和涂层。 5.3 可以对不同的操作条件或各种类型的流体进行比较。 5.4 可报告量是参考流体的效率或平均扭矩除以相关流体的平均扭矩。

1.1 This test method describes a laboratory technique to evaluate the relative performance of metal removal fluids using an instrumented tapping machine that measures and records torque. 1.1.1 The method is applicable to all tap types, machining speeds, and alloys that can be fabricated into a test piece. Comparison can be made between different operating conditions or various types of fluids including straight and emulsifiable oils, semi-synthetics and synthetic fluids (see Classification D2881 ). 1.2 The values stated in SI units are to be regarded as standard. 1.2.1 Exception— The units for the threads of the tap, M6, are in metric thread units. 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. 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 This test method can be used to predict the comparative lubricating properties of a metalworking fluid (MWF). 5.1.1 Fluids that produce lower torques or higher efficiencies are predicted to have better machining characteristics. 5.2 The method is applicable to all tap types, machining speeds, alloys and coatings that can be fabricated into a test piece. 5.3 Comparison between different operating conditions or various types of fluids can be made. 5.4 The reportable quantity is the efficiency or mean average torque of a reference fluid divided by the mean average torque of the fluid of interest.