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Definitions

The tables displayed below are listing classification standards of lubricants.
They also contain specific requirements for different types of lubricants
under particular conditions.

Standard/
applicable to
Title Keyword/
Meas. unit
Conditions Description

DIN 51 502

Oils, greases

Lubricants and related substances; designation of lubricants and marking of lubricant containers, equipment and lubricating points. DIN designation of lubricants   Consistent and unambiguous marking of industrial lubricants based on corresponding test standards to avoid damage caused by mistaken use of inappropriate lubricants.

DIN 51 506

Compressor and condenser oils

VB and VC lubricating oils with and without additives and VDL lubricating oils Condenser oil requirements   Requirements for lubricating oils that are used in air condensers with oil-lubricated compression chambers with no injection cooling.

DIN 51 509

Gear oils
and greases

Selection of lubricants for gears
Part 1: Lubricating oils ("C")
Part 2: Plastic lubricants ("G" and "OG")
 
Requirements for gear oils and greases   Standard values, criteria and advice for the selection of lubricants for rolling gear (e.g. spur wheel or bevel gear with no axial offset) and screw rolling gear (e.g. worm gear).

DIN 51 517

Machine and gear oils

Lubricants; Lubricating oils
Part 1: Minimum requirements lubricating oils "C"
Part 2: Minimum requirements lubricating oils "CL"
Part 3: Minimum requirements lubricating oils "CLP"
Machine and gear oil requirements   Requirements for lubricating oils used for circulation and immersion lubrication

DIN 51 519

Oils

Lubricants; ISO viscosity classification for industrial liquid lubricants ISO VG/
ISO VGs

Viscosity

measured at
40 °C as defined in DIN 51 562-1 or DIN EN ISO 3104

Classification system for industrial liquid lubricants based on viscosity of the lubricant. The tolerance zone is determined to +/-10% nominal viscosity.

DIN 51 524

Hydraulic oils

Pressure fluids; Hydraulic oils
Part 1: Minimum requirements lubricating oils "HL"
Part 2: Minimum requirements lubricating oils "HLP"
Part 3: Minimum requirements lubricating oils "HVLP"
Hydraulic oil requirements   Requirements for hydraulic oils
DIN 51 825 lubricants; Lubricating greases K, Classification and requirements Roller and plain bearing grease requirements   Requirements for greases used to lubricate roller bearings, plain bearings and sliding surfaces.
DIN 51 836 lubricants; Lubricating greases G, Classification and requirements Gear transmission grease requirements   Requirements for greases used to lubricate enclosed gears.

DIN ISO 2909

Oils

Petroleum products; Calculation of viscosity index from kinematic viscosity Viscosity index/
without

Viscosity measured at
40 °C and 100 °C as defined in DIN 51 562-1 or DIN EN ISO 3104

The viscosity index (VI) describes the change in kinematic viscosity of an oil with temperature. Two different methods are used in relation to the calculation of viscosity index (A: VI < 100, B: VI > 100).
DIN ISO 6743-0 Lubricants, industrial oils and related products (class L); Classification; General ISO marking of lubricants   Adoption of the international standard ISO 6743 as a German DIN standard. Alternative marking system for industrial lubricants for the avoidance of damage by mistaken use of incorrect lubricant.

Roller bearing greases

DN value /mm min   Characteristic value that describes the maximum operating speed for rolling bearing greases