1.范围1。1本标准建立了平行键和锥形键的轴尺寸和键尺寸之间的统一关系。1.2本标准涵盖平行键和锥形键的尺寸、类型和公差，以及它们与轴直径和孔径的关系。本标准中包含的尺寸和公差仅适用于单键应用，切线键除外。1.3 CEMA标准MG-1“电机和发电机”中定义了电机和发电机的键和键槽。1.4钥匙库存组成中的钥匙强度和钢材分析不在本标准范围内。1.5列出的轴直径用于识别各种键尺寸，不用于确定轴尺寸、公差或选择。

1. Scope1.1This Standard establishes a uniform relationship between shaft size and key size for parallel and taper keys.1.2This Standard covers the size, type and tolerances of paralle l and taper keys, and their relationship to shaft diameters and bore diameters. The size and tolerances contained in this Standard are intended for single key application only, except tangential keys.1.3Keys and keyways for electric motors and generators are defined in CEMA Standard MG-1, Motors and Generators.1.4Key strength and steel analysis entering into the makeup of stock for keys is not within the scope of this Standard.1.5Shaft diameters are listed for identification of various key sizes and are not intended to establish shaft dimensions, tolerances, or selection.