... 3.Market.America,German,Italy,Japan,Korean electric spindles Luoyang Bearing Science and Technology Co.,Ltd.has developed 8 groups ... electric spindles with rated speed from 5,000 r/min to 150,000 r/min,high-speed precision rolling bearing and air ... : the research, development, manufacture and sales of precision bearings, special bearings, high-frequency electric spindles for machine tool, special ...