如果是Y型轴孔的话,根据轴孔直径的大小分别有62mm、82mm、112mm 三种长度;如果是J J1型轴孔的话,根据轴孔直径的大小分别有44mm、60mm、82mm三种长度。
The length of the hub hole of the shaft is referred to as the hub and the hub is similar. The shaft bossing refers to the parts on the shaft connected to the shaft, such as gears and pulleys.The definition of shaft hub is relatively broad, and the term "shaft hub connection" is commonly used.