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Question:

I design closed bearings and install taper bearings. Where should I fill the hole?

Tapered roller bearings. The installation is complete except for the shaft ends. Therefore, only with glib lubrication.

Answer:

Tapered roller bearings? This should not be set as closed
Just above, as long as it's convenient to refuel!
Relatively large bearing housings usually in the top (center, vertical). Also according to the application, consider the convenience of refueling, the oil hole design is 45 degrees or 135 degrees away from the center of the bearing, but can not be added below

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