The grease VNIINP-228 (GOST 38.01438-87) is a mix of petroleum oil and dioctyl sebacate thickened with a complex soda soap. It contains antioxidizing and wear-protective additives. The grease VNIINP-228 possesses the best greasing properties and greater working capacity at an application heat than at VNIINP-223.
It is efficient at residual pressure 13.3 Pas and temperatures from -45 °С…+150 °С. Application: special high-speed ball-bearings with frequency of rotation to 60000 mines-1, sensitive support of exact mechanisms and friction units of computing machines. A substitute product is VNIINP-223.
Appearance and color: —
Effective viscosity, Pas, at 0 °С, not more than: 40
Effective viscosity, Pas, at 20 °С, not more than: —
Strength at 20 °С, Pas, not less than: 110
Drop temperature, °С, not lower than 180
Colloid stability under load of 300 g, %, not more than: 14
The content of free alkali in recalculation on NаОН, %, not more than: —
Penetration at 25 °С, mm, 10-1: 320-370
Evaporation at 150 °С within 1 hour, %, 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.