Sackorange 10 Pack 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

Slightly over sized center. Closer to metric than standard. Still worked in my project. Just a bit sloppy

Great quality

didnt last 20 days in electric motor not c3 not quality only buy japan bearings China Junk

front wheel bearings on a toro 30inch timemaster mower

quickly. Engineering and manufacture. Rugged with amazing value for very low price.

Good

It makes a really big difference when you have a 1/2 rod and these are slightly undersized. I assume these are millimeters. Because I had to shape down my rod maybe a 1/32 or more to get it to wedge on. And I have no lathe, so the rod isnt even. And now the gear I have on the other side is lopsided because of it. On the plus side the bearings arent very expensive and they do work. But really, be accurate. I wouldnt get these again because of that.

These seem to be good quality bearings.

Very low cost but seem OK I used these in a toy I built probably over kill but at less $1 each nothing else can match them.

Worked just fine on my 2 x 72 grinder wheels.