This type has extensive use. It is applicable in the equipment which is request of high speed gyration, low friction tortile, low vibration and low noises. for example: fan motor, encoder, miniature motor, pressure rotor, dentistry drill, HD/ CD/DVD motor, walking motor, cinematograph, memory drum, soft drive, OA appliance. Specialist: miniature bearing, the inner line diameter under 2 mm have metric 68,69,60 etc, total eighteen kinds; inch R series has six kinds, also have many kinds of other type, eg: dustproof cover series, flange series, stainless steel series; All of those type are meet different industrial and purpose. As the society development and new tech incoming to our daily life those bearing are extensively increase the demand.