本文件规定了影响北美最常用万向节端轭耳座之间互换性的主要尺寸和公差。配合万向节的尺寸和公差由万向节制造商自行决定。术语“耳道”指的是直接用于传动系万向节交叉连接的端轭连接的配置和几何结构。长期以来，某些类型的万向节连接和法兰连接的耳饰一直是某些制造商的专利。经过多年的使用，专利权已经过期，整个行业都将这些耳制品作为标准。 为了将一些长期存在的实践制成表格，编制了以下SAE推荐实践。制造商会根据需要不时更改公差或配合，以更好地提高部件性能。本文件仅供参考，是对当前技术的概述。本文件涵盖了半圆（带式连接）、全圆（固定板式连接）和翼式连接。要了解这些端轭样式，请参考SAE J901。有一些earwork表单仍然是专有的，不在本文档的范围内。

This document specified the main dimensions and tolerances which affect interchangeability between end yoke earwork for the most common North American-used universal joints. Dimensions and tolerances of the mating universal joints are left to the discretion of the universal joint manufacturers.The term ¿¿¿earwork¿¿¿ refers to the configuration and geometry defining end yoke connections directly provided for universal joint cross attachment of drivelines.Earwork for certain styles of universal joint connections and flange connections have for a long time been proprietary to certain manufacturers. Over years of usage, proprietary rights have expired and the industry, as a whole, has used these earworks as standard. In an effort to tabulate some of the long-established practices, the following SAE Recommended Practice has been compiled. Manufacturers do from time to time, as the need arises, change tolerances or fits to better enhance component performance. This document has been prepared as a reference, and is a snapshot of current technology.The half round (strap connection), full round (retainer plate type connection), and wing type connection are covered in this document. For an understanding of these end yoke styles, please refer to SAE J901.There are earwork forms that still are proprietary and are not covered by this document.