VNIINP-219 grease (TU 38.101471-74) is similar in composition to VNIINP-207 grease, but unlike it contains molybdenum disulfide. The main performance characteristics of VNINP-219 grease: it is efficient within temperatures from -50 to + 200°C. It is used in rolling bearings of electric motors and starter-generators with increased loads and a speed of up to 10000 min-1.
Physical and chemical indicators of VNIINP-219 grease (TU 38.101471-74)
Name of the indicator | Norm GOST (TU) |
---|---|
Appearance | Homogeneous ointment with smooth structure of dark gray to black color |
Effective viscosity at -30°C and mean gradient of strain rate 10 s-1 | 2,0 |
Colloidal stability, %, not more than | 7,0 |
Content of water, % | Absence |
Mass fraction of free alkali, %, not more than | 0,08 |
Drop temperature, °C, not lower than | 200 |
Penetration at 25°C, 0,1 mm, not more than | 280 - 360 |
Content of mechanical impurities, % | Absence |
Corrosion test | Gray, brown or black spots do not appear |
Tensile strength at 50°C, Pa, at least | 120 |
Effective viscosity at -50 °C, Pa-s, not more than | 800 |