Does anyone make shielded half SPEC bearings?

Would like to not have to re-grease my bearing after every 4-6 hours of consistent play. Was thinking maybe a shielded bearing would help to keep it all in.

Old thread but got me thinking couldn’t I just use shields from a full spec bearing and add them to a half spec? Might be something I fiddle with at some point.

I would just wonder if they have the grooves to except the ring that holds the shield in place.

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