10 PCS R8-2RS Double Rubber Sealed Roller Ball Bearing 1/2 Inch Bore 1/2 x 1-1/8 x 5/16 Inch ABEC3 Precision Bearing for Electric Motor, Wheels, Home Appliances, Garden Machinery

Excellent value, dimenaions were good

decent quality, most important is proper fit.

Worked in my 2 x 72 belt grinder pulley just fine still working after two years

Great product

Works for my application. Size seems pretty accurate. Quality seems good. My application is low speed so not a really good test.

These are dimensional accurate and allow for proper interference press fit based on engineering handbook. They are smooth and pre oiled, place them in my air conditioner fan as the oil light bearing failed. These bearing are used outside and they have not failed yet. Always use in pairs and follow proper engineering practices when sizing and using.

It feels good rolls well

If you don't use a wheelchair, consider yourself deeply fortunate—not because you can walk but because you don't know the misery of dragging yourself through hardware stores trying to find the right size bearing to buy for $16 each when yours decides to liberate itself from your caster in the middle of a pandemic and your chair is a useless hunk of steel without it.But thanks to these bad boys, instead of that experience, or the exponentially worse option of waiting three moons for my service provider to replace it, I can just take my casters apart myself and get rolling again for a fraction of the price.