Designation via standards:
53518 (GOST 24696-81);
22218 (DIN 635-2)
The spherical roller bearing consists of two rings (internal and external) and rolling elements (spherical rollers), connected with a separator.
W33 - annular groove and three lubrication holes in the outer ring;
EA - ULTAGE design, steel cage;
EM - ULTAGE design, mssive brass cage.