A radial bearing is a bearing that can withstand radial forces, such as the main shaft of a lathe (horizontal placement), which is gravity-bearing, which is the radial bearing.
The axial bearing refers to the bearing that can bear the axial force, or the main shaft of the lathe. When cutting, there is a large force in the axial direction of the main shaft, which is tolerated by the axial bearing.
http://www.wxjwbearing.com/