Manufacturer designation:

6303 2RS EMQ/Z2V2/P6/C3.

Designation due to standards:

6303-2RS C3 - DIN 625-1 ISO15:2011;
70-180303 - GOST 8338-75.

Design:

The ball bearing consists of two rings (internal and external) and rolling elements (balls), connected with a cage - separator.

Features:

Lip seals (type RS) on both sides of bearing.
EMQ is a special series designed for high-speed and high-load work.
Z2 - Noise level.
V2 - Vibration level.