Designation:

NJ212 (DIN5412-1);
42212 (GOST 8328-75)

Design:

The bearing consists of two rings (internal and external) and rolling elements (short cylindrical rollers), connected with a cage.

Features:

separable;
semi-locating;
with cage, mooving into one way (the outer ring with the roller and cage assembly can be separated from the inner ring).