What is the self-centering function?

The self-centering function refers to the function to suppress the runout of the hub when the shaft and hub are tightened.

In other words, it is a function of how much the axis can be brought to the center of the hub.

POWER-LOCK has a series with or without a self-centering function. For a series without a self-centering function, the hub must be provided with a guide part (a part where the shaft and hub come into direct contact).

Practical centering accuracy can be obtained if the guide length is expected to be half the shaft diameter.