VNIINP-281 grease (TU 38.10123-81) is an aviation grease. Complex sodium grease is intended for lubrication of aggregate bearings of aircraft generators and starter generators of some aircraft operating within the temperature range from -60 to +120°C. The grease has excellent low temperature properties and low volatility. VNIINP-281 grease is practically inert towards rubbers, like other greases based on isoparaffinic oil. VNIINP-281 grease is designed to operate in high-speed bearings (Dn up to 400,000 mm/min) at low loads and temperatures up to 80...100°C.
Physical and chemical indicators of VNIINP-281 grease (TC 38.10123-81)
Name of the indicator | Norm GOST (TC) |
---|---|
Appearance and color | Homogeneous soft consistent ointment with smooth structure of black colour |
Drop temperature, °C, not lower than | 200 |
Effective viscosity, according to the viscometer capillary viscometer, Pa-s, at -50 °C and mean gradient of 10 s-1 strain rate, not more than | 1500 (15000) |
Tensile strength at 50°С, Pa (hs/cm2) | 200 - 500 (2,0 - 5,0) |
Colloidal stability of allocated oil, %, not more than | 15,0 |
Evaporability at 120°C, 3H, %, not more than | 3,5 |
Content of water, % | Absence |
Corrosive influence on metals | Withstands |