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What is the difference between lubricants and lubricating oils?

1 Answers

DavidAnn

07/30/25 7:15am

Lubricants and lubricating oils have the following differences: 1. Adhesion properties differ: When the friction part is in a static state, the lubricating grease can maintain its original shape, will not automatically flow away due to gravity, and will not slide off vertical surfaces or drip from gaps. This characteristic is very suitable for friction parts that start and stop frequently or are not often moved, for parts where it is very difficult to replenish lubricating grease (such as overhead crane lubrication points in the air), and for open or poorly sealed parts. 2. Temperature range differs: The working temperature range of lubricating grease is wider than that of lubricating oil. For example, general lithium-based lubricating grease can be used in the temperature range of -20~120℃, and general calcium-based or lithium-based lubricating grease can also be used at -20~60℃ or -20~120℃. However, a specific grade of lubricating oil has a much narrower temperature range of use. 3. Pressure resistance differs: The adsorption capacity of lubricating grease on metal surfaces is much greater than that of lubricating oil, and it can form a relatively strong oil film to withstand higher working loads. This is due to the large amount of polar substances contained in the lubricating grease. In addition, as a base grease, when polar additives are added, its sensitivity is also better than that of lubricating oil.

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