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1.1 This test method measures the ability of single-use way lubricants to separate from metalworking coolants (synthetic coolants, semisynthetic coolants, and soluble oils) or other alkaline aqueous fluids.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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. For specific warning statements, see Section 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.

5.1 In the normal use of a way lubricant in a machine tool, the way lubricant eventually becomes a contaminant that may emulsify into the coolant. It is generally desirable to remove this contaminant by skimming; otherwise, the coolant lifetime may be significantly shortened. This test method provides a guide for determining the separability characteristics of way lubricants that are expected to get into aqueous alkaline metalworking coolants. It is used for specification of new oils and might be useful in monitoring of in-service oils.