... 606-6010,,625-6210,6300-6310 etc in ZZ 2RS 2)material in carbon steel/chrome steel 3)ISO9001:2008 ... product advantage is deep groove ball bearing used widely in bearing products, is the most representative of a ... high speed rotation, and very durable, need not go to maintain more time. Deep groove ball bearing small friction ... speed limit, the manufacture cost low, and easy to achieve higher system