本文件规定了直线（非螺旋）侧装圆柱渐开线花键设计和制造的几何尺寸和检验尺寸。 定义了极限尺寸、公差、制造误差及其对连接同轴花键元件之间配合的影响，并制成表格。线性尺寸以毫米表示，角度尺寸以度表示。 几何表中规定的外花键直径和检验尺寸表中的值仅对基本偏差“h”有效。 对于除“h”以外的基本偏差，根据ISO 4156-1中的公式计算外花键的直径和齿厚，并根据ISO 4156中的公式计算检验尺寸- 3.

This document specifies geometry and inspection dimensions for the design and manufacture of straight (non-helical) side-fitting cylindrical involute splines. Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between connecting coaxial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees. The specified diameters for external splines in the geometry tables and the values in the inspection dimension tables are only valid for fundamental deviation "h". For fundamental deviations other than "h", diameters and tooth thicknesses are calculated for external splines according to the formulae in ISO 4156-1 and inspection dimensions according to the formulae in ISO 4156-3.