The grease VNIINP-247 (TOR 38.401352-81) composition is similar to grease VNIINP-207. It is characterized by low hygroscopicity and thermo hardening.
It is efficient at temperatures from -40 °С…+180 °С.
Application: bearing units of electric micro machine with frequency of rotation to 20000 mines-1, tooth gearings of electro fans, etc. The substitute product is VNIINP-207.
Appearance and color: —
Effective viscosity, Pas, at 0 °С, not more than: 220
Effective viscosity, Pas, at -20 °C, not more than: —
Strength at 20 °С, the Pas, not less than: 690
Drop temperature, °С, not lower than 200
Colloid stability under load of 300 g, %, not more than: 8
The content of free alkali in recalculation on NаОН, %, not more than: —
Penetration at 25 °С, mm, 10-1: 220-250
Evaporation at 200 °С within 1 hour, %, not more than: —
Mass fraction of free alkali, %, not more than: —
Data on operational temperatures represent values, which are guided by a structure of lubricants, and also on a scope and technology of use. Depending on a kind of mechanical-dynamic loading lubricants change the consistence, conditional viscosity or viscosity at various temperatures, pressure and duration of operation. These changes of indicators can affect work of components.