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|Inner Diameter:||1.8898 in|
|Outer Diameter:||3.3858 in|
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Q:Is this a sealed bearing and do I need to regrease this bearing time to time?
A:Hi Hasan, I'm glad to assist you! This National Front Wheel Ball Bearing - Part No. 510073 is a fully sealed bearing. The sealed bearings are considered maintenance free and lubed for the life of the bearing. This is because they are packed with a heavy duty, lithium based grease. When the lube fully dissipates it is generally time to replace the bearing. However, this does not mean that you cannot extend the life of the bearing. When they start to feel gritty, you can remove the seals and soak the bearings. Then you can re-lube them with your lube of choice. Just keep in mind that the thinner the lube is, such as oil vs grease, the quicker it will dissipate and need to be reapplied.
Q:How many come in a package?
A:Hi Josh, glad to serve you! This part is sold individually.