These ABEC 3 Class bearings, identified as the A7Y55-E Series, are made of 440C stainless steel and come in nine bore sizes ranging from 0.0469 to 0.3125-in. diameter, with outer-ring diameters from 0 ...
Editor's note: An updated version of this information can be found here. Bearings are used to help reduce friction. Metal-upon-metal contact produces large amounts of friction. The friction adds to ...
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