VEX Pro vs. AM Bearings

[jsasaki]

So today after hours of milling out our chassis rails I noticed something when I was assembling them. Unfortunately the bearings bought from VEX Pro were not to the quality I would have liked. So heres what I noticed. 1. The VEX bearings were not stamped HEX leading me to think that the bearing was broached by VEX unlike AndyMarks which is stamped FR8-ZZ now I dont know whether this is done by the manufacturer so I cant say exactly. 2. The bore/ inner ring on the AndyMark bearings look larger than the ones on the VEX Pro one. 3. when the bearing were press fitted in our Gearbox to take a hex output if would stick in one place./ when press fitted into our chassis rails and bearing blocks the fit was tight and when it did fit the would be wobble in the sprockets and wheel hubs seen in this video https://www.youtube.com/watch?v=EmbLamJat6o (I have about 10 AM Bearings and 34 VEX Pro bearings. Tried them all in different combinations) I'm not saying the VEX Pro parts are bad but just that the fit of the bearings weren't good enough for us. Just a heads up for teams and VEX.