1.1本规范涵盖具有厚外圈、带滚柱和保持架的滚针轴承。 1.2规定的轴承用于硬化轴（HRC58-65；见试验方法 E18 ). 对于未硬化轴，轴承应与内轴承环MS51962一起使用 按规范规定 F2431 显示为MS500072 规范中的轴承组件 F2430 . 1.3鼓励使用符合适用材料规范要求且不影响项目预期用途的回收材料。 1.4根据本规范设计的轴承适用于需要高径向负载且轴角错位最小的应用。 1.5以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 注1 — 本规范包含MS51961的许多要求，MS51961最初由国防部开发，由里士满国防供应中心维护。

1.1 This specification covers needle roller bearings having thick outer rings, with rollers and cages. 1.2 The bearings being specified are intended to be used with hardened shafts (HRC58-65; see Test Methods E18 ). For use with unhardened shafts, bearings should be used in conjunction with inner bearing ring MS51962 as specified in Specification F2431 and shown as MS500072 bearing assemblies in Specification F2430 . 1.3 The use of recycled materials that meet the requirements of the applicable material specification without jeopardizing the intended use of the item is encouraged. 1.4 Bearings designed to this specification are intended for use in applications requiring high radial load with minimal angular shaft misalignment. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Note 1 — This specification contains many of the requirements of MS51961 which was originally developed by the Department of Defense and maintained by the Defense Supply Center Richmond.