This group includes lubricants with a maximum working temperature of 300-400 ° C and above for a sufficiently long time (at least for tens and hundreds of hours). Some of them: Tsiatim-221, VNIINP-219, VNIINP-231, VNIINP-235, VNIINP-246, VNIINP-207. When choosing heat-resistant grease, it is best to consult with a specialist.
VNIINP-207 grease according to GOST 19774-74 - is used in rolling bearings of electric machines and starter generators with a rotation speed of up to 10,000 min-1, is operable at a residual pressure of 666.5 Pa and a temperature of -60 ... + 200 ° С. VNIINP-207 grease is characterized by exceptional water resistance, hygroscopicity, and increased thermal oxidative stability. VNIINP-207 grease substitute: Tsiatim-221 grease.
VNIINP-210 grease (TU 38.101275-72) - an organosilicon fluid thickened with inanthrene, contains graphite, molybdenum disulfite, an antioxidant additive. According to its properties, it occupies an intermediate position between greases and pastes, is operational at a residual pressure of 666.5 Pa and a temperature of -20 ... + 250 ° С. It is used in heavily loaded slow-moving rolling and sliding bearings with rocking motion of friction surfaces at small swing angles. VNIINP-210 grease substitutes: VNIINP-231 grease, VNIINP-246 grease.
VNIINP-219 grease (TU 38. 101471-74) - is used in rolling bearings of electric motors and starter generators with increased loads and rotational speed up to 9000 rpm, ball screw drives of aircraft. It is efficient at a temperature of -50 ... + 200 ° С. The composition is close to the lubricant VNIINP-207, but in contrast to it contains molybdenum disulfide. Substitutes: VNIINP-207, TsIATIM-221.
VNIINP-231 grease (TU 38. 101 1220-89) is an organosilicon fluid thickened with technical carbon (soot) DG-100. VNIINP-231 grease is used in closed worm-screw mechanisms, low-speed rolling and sliding bearings, and threaded joints. According to its properties, VNIINP-231 occupies an intermediate position between lubricants and semi-fluid pastes. Frost resistant. It is efficient at a residual pressure of 666.5 Pa and a temperature of -60 ... + 250 ° C. Lubricant substitute VNIINP-231, VNIINP-246.
VNIINP-233 grease (TU 38.101687-77) is a perfluoropolyether thickened with a polymer. It is used in rolling and sliding bearings with oscillating motion, mating surfaces "metal-rubber".
VNIINP-235 grease (TU 38. 101297-78) is an organosilicon fluid thickened with an organic thickener. It is used in rolling bearings. The viscosity of the lubricant is slightly dependent on the strain rate; high thermal and low colloidal stability, good extreme pressure properties. It is efficient at a residual pressure of 666.5 Pa and a temperature of -60 ... + 250 ° C. VNIINP-235 grease substitutes: VNIINP-231.
VNIINP-246 grease (GOST 18852-73) is an organosilicon fluid thickened with a pigment. It is used in rolling bearings and low-power gears. It is efficient in vacuum up to 1.3 10-4 Pa and temperature -60 ... + 250 ° С.
VNIINP-247 grease (TU 38.401352-81) is close to VNIINP-207.
PFMS-4c lubricant (TU 6.02.917-79) is a polymethylphenylsiloxane fluid thickened with colloidal graphite. PFMS-4s grease - used in aviation friction units, low-speed rolling bearings, screw ball gears, threads. According to rheological properties, it occupies an intermediate position between lubricants and pastes; increased extreme pressure properties, high thermal stability and low volatility. PFMS-4s grease is efficient at a temperature of -30 ... + 300 0С, for a short time up to +400 0С.
Grease Graphitol (TU 38 USSR 201172-77) - residual oil thickened with modified aerosil; contains graphite. Graphitol has high thermal stability, low volatility, good extreme pressure properties, and satisfactory water resistance. It is efficient at a temperature of -25 ... + 160 ° С. It is used in high-temperature friction units, mainly sliding; hot fans, hinges locks of doors of drying chambers and other industrial mechanisms.
Tsiatim-221 grease (GOST 9433-80) - an organosilicon fluid thickened with complex soap; contains an antioxidant additive. It is insoluble in water, hygroscopic, and remains stable even when boiling. When absorbing moisture, Tsiatim-221 is compacted, has low anti-wear characteristics, chemically resistant, inert to rubber and polymeric materials. Tsiatim-221 grease is efficient at a residual pressure of 666.5 Pa in the temperature range from -60 to + 150 ° C. Tsiatim-221 grease - is intended for rolling bearings of electric machines, control systems and devices with a rotation speed of up to 10,000 min-1, aggregate bearings of aircraft, friction units and conjugated metal-rubber surfaces operating in vacuum.