轴套是指螺旋桨轴或艉轴上的套筒。而轴承是在机械传动过程中起固定和减小载荷摩擦系数的部件。

轴套和轴承的相同之处是两者都承受轴的载荷。

而两者的不同之处是轴套是整体结构的，转动时是轴和轴套之间相对运动；而轴承是分体式的，转动时是轴承自身内外圈相对运动。但是从本质上来说，轴套其实就是滑动轴承的一种。

轴瓦相当于滑动轴承的外环，轴套是整体的，并且相对轴是运动的，而轴瓦有的是分片的，相对轴是旋转的。

在LEGO Mindstorms 系列与BioTrans RoSys系列机器人组件中轴套特指银灰色的乐高标准轴固定器，分全轴套和1/2轴套两种。

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A bushing is a sleeve on a propeller shaft or a yoke shaft. The bearing is a component that fixes and reduces the friction coefficient of the load during the mechanical transmission process.

The same thing about bushings and bearings is that both bear the load on the shaft.

The difference between the two is that the sleeve is of integral structure, and the relative movement between the shaft and the sleeve is when rotating; and the bearing is split, and the inner and outer rings of the bearing are relatively moved when rotating. But in essence, the bushing is actually a kind of sliding bearing.

The bearing pad is equivalent to the outer ring of the sliding bearing, the bushing is integral and the opposite axis is moving, while the bearing bush is segmented and the opposite axis is rotating.

In the LEGO Mindstorms series and BioTrans RoSys series of robot components, the sleeves are specifically referred to as the silver-gray LEGO standard shaft holders, which are divided into full sleeves and 1/2 sleeves.