1.1 本规范涵盖具有厚外圈的滚针轴承的内圈。 1.2 指定的内圈拟与规范中规定的MS51961滚针轴承一起用于未硬化轴 F2246页 . 1.2.1 用于薄外圈滚针轴承（规范 F2162 ，MS17131，MS52141）使用规范中规定的内环 F2163 . 1.3 按照本规范设计的内圈旨在用于需要高径向负载且轴角错位最小的应用中。 1.4 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。 1.5 本规范包含MS51962的许多要求，MS51962最初由国防部开发，由位于里士满的国防供应中心维护。以下政府活动代码可在国防部标准化目录SD-1中找到。 2. 准备活动 保管人 审查活动 DLA–GS4 陆军–AT 空军–84 海军-操作系统 空军-99 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers inner rings for needle roller bearings having thick outer rings. 1.2 The inner rings being specified are intended for use on unhardened shafts in conjunction with the MS51961 needle roller bearings specified in Specification F2246 . 1.2.1 For needle roller bearings with thin outer rings (Specification F2162 , MS17131, MS52141) use inner rings specified in Specification F2163 . 1.3 Inner rings designed to this specification are intended for use in applications requiring high radial load with minimal angular shaft misalignment. 1.4 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. 1.5 This specification contains many of the requirements of MS51962, which was originally developed by the Department of Defense and maintained by the Defense Supply Center in Richmond. The following government activity codes may be found in the Department of Defense, Standardization Directory SD-1. 2 Preparing activity Custodians Review Activity DLA–GS4 Army –AT Air Force–84 Navy–OS Air Force–-99 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.