Spherical roller bearing basic type
The roller bearings are divided into cylindrical internal holes and conical internal holes.
Taper of cone inner bore: 1:12 rear-coded K30 aligning roller bearings (153,000 or 113,000)
1:30 rear-coded K30 aligning roller bearings, respectively.
When matched with a conical shaft, the inner ring moves along the axial direction to adjust the radial clearance of the bearing.