渐开线花键的定心方式为齿形定心。受载时齿上有径向力，能起自动定心作用，有利于各齿受力均匀，强度高，寿命长。用于载荷较大，定心精度要求较高以及尺寸较大的联接，圣霖联接机采购，如航空发动机、燃气轮机、汽车等。压力角45°的花键多用于轻载、小直径和薄型零件的联接。

The involute spline is centering in the shape of the tooth. The tooth has radial force on the tooth， and it can play the role of automatic centering， which is beneficial to the uniform force of each tooth，圣霖联接机购买， high strength and long life. It is used for large load， high precision and large size connection，圣霖联接机， such as aero engine， gas turbine， automobile and so on. The spline with a pressure angle of 45 degrees is used for the connection of light，圣霖联接机报价， *all diameter and thin parts.

螺旋副的间隙大，旋转时费力，使用中稳定性差。机用虎钳开合行程大，螺旋副的运行长度较长，为保证能够快速装夹，（金属加工真不错）机用虎钳螺旋副的螺距较大。较大的螺距意味着较大的螺旋升角，转动单圈进给量较大，使用时较费力；较大的螺距需要更大的配合间隙来确保螺旋副的正常使用。

The clearance of the helix pair is large， the rotation is hard and the stability of the use is poor. The machine has large opening and closing stroke， and the operation length of the screw pair is longer. In order to ensure quick clamping， metal machining is good. Larger pitch means larger spiral angle， larger single turn feed and more laborious use. Larger pitch need*ore fit clearance to ensure the normal use of screw pair.

切向键联接：它由两个普通楔键组成。其上下两面（窄面）为工作面，其中之一面在通过轴心线的平面内。工作面上的压力沿轴的切线方向作用，能传递很大的转矩。

Tangent key join: it c*ists of two common wedges. Both sides of the upper and lower sides (narrow surface) are working faces， one of which is in the plane of the axis of the axis. The pressure on the working face acts along the direction of the shaft and tran*it a large torque.