NK-50
TU 38.1011219-95
NK-50 is the MC-20 oil thickened with the stearine and olein sodium soap. It contains colloidal graphite.
NK-50 is used for the aircraft landing gear hubs within the temperature range from -15°C to +120°C. Its former brand name was ST – (high-heat aircraft-engine grease).
| Index name | Norm |
|---|---|
| Drop point, °C, min. | 200 |
| Penetration at 25°C, 0,1 mm | 170-225 |
| Point of break at 20°C, Pa | 700-1200 |
| Viscosity at 0°C and rate of deformation average gradient 10s-1, Pa•s, max. | 1000 |
| Colloid stability, %, max. | 7 |
