ISO 12925-3:2021

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Lubricants, industrial oils and related products (Class L) — Family C (gears) — Part 3: Specifications for greases for enclosed and open gear systems

ISO 12925-3:2021 is an international standard that specifies the requirements for greases used in enclosed and open gear systems, categorized under "Family C" in the lubrication classification system, which means it defines the minimum performance criteria for gear greases based on their base oil type (mineral or synthetic) and intended application.