Sapfir (VNII NP-261)
TU 38.1011051-87
Sapfir (VNII NP-261) is used for lubrication of aircraft landing gear hubs conical roller bearings within the temperature range from -60°C to +150°C, with occasional short-time surges of up to 200°C.
| Index name | Norm |
|---|---|
| Drop point, °C, min. | 250 |
| Penetration at 25°C, 0,1 mm | 265-295 |
| Point of break at 20°C, Pa | 240-420 |
| Viscosity at 0°C and rate of deformation average gradient 10s-1, Pa•s, max. | 7 |
| Colloid stability, %, max. | 5 |
