本标准包括:（a）公制径向球轴承和滚柱轴承外形尺寸的基本方案；（b） 基本计划延期的一般规则；（c） 卡环槽和定位卡环的尺寸和公差；（d） 带法兰外圈的径向球轴承的尺寸；和（e）外形尺寸、倒角、各种跳动和内部间隙的公差。本标准不包含有关内部轴承设计的任何指示，也不包含有关轴承可用性的任何指示。机身轴承、仪表球轴承、滚针轴承、圆锥滚子轴承、止推轴承和其他不符合这些外形尺寸基本计划的轴承类型和系列在其他章节中有说明 ANSI/ABMA标准。

This standard includes:(a) basic plan for the boundary dimensions of metric radial ball and roller bearings;(b) general rules for extension of the basic plans;(c) dimensions and tolerances for snap ring groove and locating snap rings;(d) dimensions for radial ball bearings with flanged outer ring; and(e) tolerances for boundary dimensions, chamfers, various runouts and internal clearance.This standard does not contain any direction pertaining to internal bearing design nor any indication as to availability of bearings.Airframe bearings, instrument ball bearings, needle roller bearings, tapered roller bearings, thrust bearings and other bearing types and series not conforming to these basic plans for boundary dimensions are covered in other ANSI/ABMA Standards.