I may be the only person who has ever had problems with the Chinese roller bearings... Then again... maybe just another unsatisfied customer.
Your not the only one. After contacting a vendor to order new ball bearing types, they assured me they were American made. After recieving them they had 'CHINA' stamped on the side.
In my hand the bearings were sloppy in the race. They were complete pieces of crap.
They went back in a heartbeat and I ordered from a reputable bearing supplier and got Japanese made MBS in return. Several years later, not a single problem.
Jeff