Lubricating Greases_3
Grease is a semi-solid lubricant consisting of a base oil and a thickener . The main types and general properties of grease are shown in the table. In general, different brands of grease must not be mixed. Mixing grease with different types of thickeners may destroy its composition and physical properties. Even if the thickeners are of the same type, possible differences in the additives may cause detrimental effects.
Part 1 | Part 2 | Part 3
Name
(Popular name) |
Complex base grease(Complex grease) |
Non-soap base grease(Non-soap grease) |
| Thickener |
Ca complex soap
Al complex soap
Li complex soap, etc. |
Urea, bentonite, carbon black, fluoric
compounds, heat-resistant organic
compounds, etc. |
| Base oil |
Mineral oil |
Mineral oil |
Synthetic oil (ester oil, polyatomic ester oil, synthetic hydrocarbon oil, silicone oil, fluoric-based oil) |
| Dropping point, °C |
180~300 |
230~ |
230~ |
| Working temperatures, °C |
-20~+130 |
-10~+130 |
~+220 |
| Working speed, %(1) |
70 |
70 |
40~100 |
| Mechanical stability |
Good |
Good |
Good |
| Pressure resistance |
Fair to Good |
Fair |
Fair |
| Water resistance |
Good |
Good |
Good |
| Rust prevention |
Fair to Good |
Fair to Good |
Fair to Good |
| Remarks |
Suitable for extreme pressures Mechanically stable |
Mineral oil-based grease is a middle to high-temperature lubricant. Synthetic oil-base grease is recommended for low or high temperatures. Some silicone and fluoric oil-based greases have poor rust prevention and noise problems. |
Note
1. The values listed are percentages of the limiting speeds given in the bearing tables.
Remarks: The grease properties shown here can vary between brands.
|
