... ,Bearing Steel3) Shield/closure: open bearing, Z, ZZ, RS, 2RS,RZ, OPEN4) Vibration and Noise level: Z1, Z2.5) Precition level ... ; Motorcycle, Motor, Pump, Fan, Are conditioner, Microwave Oven, Rangehood, sewing machine, massage chairs, Textile machinery, Electric tools, Agriculture machinery, fitness equipment ...