ISO 3448:1992 Preview
Industrial liquid lubricants -- ISO viscosity classification
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
Establishes a system of viscosity classification for industrial liquid lubricants and related fluids including mineral oils used as lubricants, hydraulic fluids, electrical oils and for other applications. The usual method for kinematic-viscosity determination is that specified in ISO 3104. There may be some pure chemicals and naturally occurring products, used as lubricants, which will not fall within the classification.
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