Minimum load of rolling bearings

When the load is too small - if the speed is high during operation, it will cause slippage, and if the lubrication is insufficient, the bearing will be damaged. The following are the recommended values for the bearing minimum load:

Ball bearing with cage P / C =0.11

Roller bearing with cage P / C =0.02

Without cage bearing P / C = 0.04

(P is the equivalent dynamic load and C is the basic dynamic load rating)

The minimum load of the thrust bearing can be found in the overview of the bearing size table.

Excessive size reduces the service life of the bearing: the reason is that the oversized bearing is prone to slippage, and the original design is a lubricant for life, and the internal working stress is increased. Slip will cause a glued and reliable working week, which is better than using the bearing capacity. For this reason, as in the calculation of the corrected bearing life, when calculating the bearing life, in addition to the basic rated load, other factors of the bearing must be affected.

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Analysis of the causes of burns on imported bearings

The so-called burn injury state of the imported bearings means that the raceway wheel, the rolling element and the cage of the imported bearing are heated rapidly during the rotation until discoloration, softening, welding and damage.

The main cause of burns on imported bearings is the poor lubrication of imported bearings, the possibility of using irregular lubricants, or too many lubricants, too few, are incorrect. For related information on the lubrication of imported bearings, please refer to the introduction of the two articles "The Misunderstanding of Lubricating Grease in the Process of Repairing FAG Bearings" and "Introduction to Lubrication Technology in Imported Bearings".

Secondly, it may be an excessive load (preload is too large). The speed is too high. The play is too small. There is water or other foreign matter invading. If the above two cases are not the case, the accuracy of the shaft and the bearing housing is poor, and the deflection of the shaft is large. Seeing this, I think everyone wants to know the solution. First, we should study the lubricant and lubrication method, choose the bearing lubricant, and the amount of the lubricant, and correct the bearing selection. Research is to match, bearing clearance and preload, and to improve the seal. Check the accuracy of the shaft and bearing housing. Of course, if you have an expert next to you, let him operate and learn the best!

It is recommended that when using imported bearings, it is necessary to pay attention to the installation, lubrication, clearance and other aspects to be as accurate as possible.

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