Single Row Deep Groove Ball Bearings

Sealed bearings - Bearings with shields

Bearings with shields, designation suffix Z or 2Z, are produced in one of two designs, depending on the bearing series and size. The shields are made of sheet steel and normally have a cylindrical extension in the shield bore to form a long sealing gap with the inner ring shoulder (fig). Some shields do not have the extension (fig).

Shielded bearings are primarily intended for applications where the inner ring rotates. If the outer ring rotates, there is a risk that the grease will leak from the bearing at high speeds.

Details regarding the suitability of Z shields for various operating conditions will be found in table 1.

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