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