Steve, I worked in a power transmission parts distributor early in my career. Bearings have standard configurations. If you can't see the numbers on the bearing's seals take the bearings out and go to US Bearings or Motion Industries or Royal Brass odds are they have the exact part you need on the shelf, only difference is theirs might be a zinc seal instead of a rubber seal. Number will be something like 6108RS (rubber seal) or 6108RZ (Zinc Seal)
Denis
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