Issues with bearing seal covers
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I see that bearings generally come with sealing covers these days. I would like to ask whether these sealing covers should be removed or left in place when using the bearings, as there is no specific standard for this – it’s up to personal judgment. Do any of you have any insights on this issue? It’s about knowing when it’s not necessary to wear a cover, and when it’s essential to do so
It mainly depends on the operating conditions. By \"sealing cover\", we mean a dust cover; if there is an appropriate amount of lubricant before installation, add more if necessary – about 1/2 of the bearing’s volume should be sufficient
If the bearing housing is lubricated with oil or grease, the dust cover should be removed; otherwise, it should remain in place.
Well, in theory that’s the case, but it’s difficult to spread butter once this sealing lid is on, so this issue seems a bit contradictory
But sometimes the oil inside the system is a bit dirty; it’s contradictory
It mainly depends on the operating conditions of the equipment; bearings with contact seals (with the suffix 2RSH, 2RS1) or dust covers (2Z) can be lubricated for life and require no maintenance.
The sealing cover serves mainly to prevent dust from entering. If the model includes ZZ, it means there are sealing covers on both sides; if there is only a Z, it indicates a sealing cover on one side only. Bearings with ZZ are maintenance-free; there is no need to replenish lubricant regularly, and they can be used until they wear out. If there is no dust in the environment, there’s no need to set ZZ; just purchase Z
It should be determined based on the actual operating conditions. The dust cover can effectively prevent external contaminants from entering, so it is still necessary to keep it in use if the operating conditions are not ideal. If it is in a confined space, it should be removed to ensure proper injection of lubricant! :P
Are there also maintenance-free bearings? So no need for subsequent maintenance?
\"Single-sided\" means it’s a bit stronger than \"double-sided\", but not as good as \"maintenance-free\"?