BS PD ISO/TS 19858:2015 defines test procedures for classifying the lubrication ability of saw chainlubrication oils when using guide bar and saw chain.These test procedures create a reproducible replication of the stress conditions experienced by the sawchain and guide bar during sawing. The test shows the capacity of the lubricant for reducing the wearbetween friction partners.This enables the manufacturers of chain saws to include specifications for recommended saw chainlubrication oils in the owner's manual.The test rig is based on a design produced by the Swedish test commission Svensk Maskinprovning(SMP). The test procedures also take into account the long-term practical experience of the Kuratoriumfur Waldarbeit und Forsttechnik e.V (KWF) in testing bio-degradable chain lubrication oils.Cross References:ISO 2049ISO/IEC 17025