B92.1附录的目的是扩大标准的能力。所有数字都连接到一个公式，以便更容易地使用该标准。定义了最小有效间隙。形状间隙由齿尺寸控制，最小圆角半径为平齿根花键指定。为了澄清，添加了一些图纸标注，对于齿数较多的花键，公差受到限制。

The purposes of this addendum to B92.1 is to expand the capability of the standard. All numbers are connected to a formula to enable an easier use of the standard. Minimum effective clearance is defined. Form clearance is controlled by tooth size and minimum fillet radius is specified for a flat root spline. Some drawings callouts are added for clarification and the tolerances are limited for splines with a larger number of teeth.