PFMS-4S
TU 6.02.917-79
PFMS–4S is a poly-methyl-phenyl-siloxane fluid thickened with colloidal graphite.
The heat-resistant PFMS–4S grease is used for lubrication of aircraft friction units, low-speed roller bearings and screw ball joint drives within the temperature range from -30°C to +300°C with occasional short-time surges of up to 400°C.
| Index name | Norm |
|---|---|
| Drop point, °C, min. | 180 |
| Penetration at 25°C, 0,1 mm | 175-205 |
| Point of break at 20°C, Pa | 1000-1500 |
| Viscosity at -50°C and rate of deformation average gradient 10s-1, Pa•s, max. | 500 |
| Colloid stability, %, max. | 10 |
