Why does your truck bearing grease harden?
It is believed that many card friends have encountered the phenomenon of bearing grease drying and hardening during operation, and after the grease hardens, it will cause blockage, resulting in poor lubrication of the system, increasing the friction resistance of mechanical components, and increasing the consumption of mechanical power. So, why does the bearing grease become hard?
1. Under normal circumstances, the hardening of grease is caused by the separation of the Base Oil from the thickener, resulting in a hard lump substance. In fact, under normal circumstances, part of the base oil in the grease will also be precipitated from the grease over time, with the increase of the amount of base oil precipitation, the grease will slowly harden, when the amount of precipitation reaches half, the grease needs to be replaced immediately.
Therefore, the card friends must regularly lubricate and maintain the wheel bearings, and the service cycle of the general grease is about 6 months to 1 year.
2. Excessive grease filling of bearings, overheating caused by mechanical conditions (improper installation, excessive load, etc.), insufficient lubrication may cause overheating problems in operation, among which, excessive grease filling is a common incentive.
If the mechanical temperature of the vehicle is too high during operation and the drop point of the grease is reached, the base oil will begin to precipitate, resulting in the grease becoming dry and hard.
Therefore, the card friends in the bearing lubrication maintenance, do not think that the more grease added the better, the right amount is the best.
3. The bearing with large radius and high speed will produce high centrifugal force, which can also make the grease oil, resulting in the hardening of the grease.
The choice of grease
When choosing bearing grease, it should be determined according to bearing speed, operating temperature, whether noise reduction, load and other working conditions. Only by choosing the right grease can the best lubrication effect be achieved.
