轴类零件是机器中常见的经典零件之一，它由圆柱表面、阶台面和端面、退刀槽、倒角、键槽、中心孔及圆弧槽组成，每一部分都有不同的用途，下面就由亿莱瑞德为大家简单介绍一下吧。
①圆柱表面：用于支承传动工件(齿轮、带轮)和传递扭矩。
②阶台面和端面：用于确定安装在轴上的工件轴向位置。
③退刀槽：能方便磨削外圆或车螺纹时退刀，并可使工件装配时轴向位置准确。
④倒角：可防止工件边缘锋利划伤操作者，还便于轴上齿轮、轴套等零件的装入。
⑤键槽：安装键，实现动力和运动的传递。
⑥中心孔：车削加工时的定位基准。
⑦圆弧槽：可以提高轴的强度，使轴在受交变应力作用时不致因应力集中而断裂，此外使轴在淬火过程中不容易产生裂纹。
Shaft parts are one of the common classic parts in machines, it consists of cylindrical surfaces, stepped surfaces and end surfaces, receding grooves, chamfers, keyways, centre holes and arc grooves, and each part has a different purpose, which will be briefly introduced by Yilai Ruide.
①Cylindrical surface: used to support the transmission workpiece (gear, pulley) and transfer torque.
②Step and end surfaces: Used to determine the axial position of the workpiece mounted on the shaft.
③Retracting groove: It can facilitate the retracting of tools when grinding cylindrical or turning threads, and make the axial position of the workpiece accurate when it is assembled.
④Chamfer: It can prevent the sharp edge of the workpiece from scratching the operator, and also facilitate the loading of gears, bushings and other parts on the shaft.
⑤ Keyway: Installation of key to realise the transmission of power and motion.
⑥Centre hole: positioning reference in turning process.
⑦ Arc groove: can improve the strength of the shaft, so that the shaft will not be fractured due to stress concentration when subjected to alternating stress, in addition to making the shaft in the quenching process is not prone to cracks.