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200、300系列轴承是小型电机和分马力电机广泛采用的配套轴承。自75年开始,特别是79年颁布《电机用单列向心球轴承振动技术条件》(Q/Z2—79)、《电机用单列向心球轴承补充技术条件》(Q/Z10—79)以后,轴承行业开始大力推行Z_1组轴承,经过行业质量评比、工艺验证和装机试验等活动,使Z_1组轴承的精度提高,振动和噪声有所降低。据港商80年评价:“国产的TAM小型轴承Z_1组噪声和SKF轴承的水平已接近”。但电机行业为满足国外用户对电机噪声和振动标准的要求,对出口的电机全部装用进口轴承,在货源充足的条件
200,300 series bearings are small motor and sub-horsepower motor supporting bearings. Since 75 years, especially 79 years after the promulgation of “motor single row radial ball bearing vibration technical conditions” (Q / Z2-79), “motor single row radial ball bearings supplement technical conditions” (Q / Z10-79) later , Bearing industry began to vigorously promote the Z_1 group of bearings, after the industry quality appraisal, process validation and installed test and other activities, Z1 group bearing accuracy, vibration and noise has been reduced. According to Hong Kong’s 80-year evaluation: “Domestic TAM small bearings Z_1 group of noise and SKF bearings are close to the level.” However, the motor industry to meet the requirements of foreign users of motor noise and vibration standards, the export of all motor bearings installed in the supply of adequate conditions