Double row tapered roller bearing
It is classified into two types: capped and open
The former equips two raceway outer rings and two single raceway
inner rings. The latter equips two raceway outer rings and one
double raceway inner ring. Both of them can bear radial load and
double row axial load. In order to make bearing having required
internal clearance after being installed, its inner/outer spacer
are thinned previously.