Normal tolerance class 普通公差等级
NKE Taper Roller Bearings are produced in normal tolerance class (PN) as standard.
NKE的生产圆锥滚子轴承在正常公差等级(PN)作为标准。
NKE single row angular contact ball bearings of the series 72 and 73 are produced to normal tolerance class (PN) as standard.
NKE的单列角接触球72和73系列轴承生产正常糖耐量类（PN）作为标准。
Angular contact ball bearings of universal design UO or UA are supplied with normal tolerances no suffix for the tolerance and, upon request, with tolerance class P5 suffix P5.
可提供普通公差公差无后缀的角接触球轴承uo或者UA通用设计型，并且，也能提供P 5级别公差后缀p5。
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