The “Rotating Bomb” aging test
The aging test based on the “rotating bombs” principle is suitable for testing both oils and greases.
The lubricant sample is poured into a pressure vessel to which oxygen is added. The specimen container is then placed in the temperature control bath. There, the sample is continuously moved to bring it into contact with the oxygen as intensively as possible. The evaluation electronics record the pressure curve in the test vessel. A decreasing pressure indicates the progressive oxidation (aging) of the oil.
Fuel or water can be added to the sample to further tighten the test.
| Parameter | |
| Test stations | 2 |
| Temperature | 20 to 160°C; standard 140, 160°C |
| 0 to 862 kPa; standard 620 kPa | |
| Catalysts | Steel/copper wire |
| Test duration | Standard 10 min to approx. 3 hrs. |
| Indicators | Pressure curve, viscosity change |
| Oil quantity | 50, 300, 1,500 ml (depending on standard) |
Standard tests
- Standard test method for oxidation stability of inhibited mineral insulating oil by rotating bomb ASTM D 2112-95
- Standard test method for oxidation stability of steam turbine oils by rotating pressure vessels ASTM D 2272-98.
- Standard Test Method for Oxidation Stability of Automotive Gasoline Engine Oils by Thin Film Oxygen Uptake (TFOUT) ASTM D 4742-88, IP 229.