Ball bearings WIB - Technical information - Bearing Protection

Non-contact Shields

RSR
Seal, standard colour black.

RSV
VITON® seal for high temperatures (230°C), Standard colour orange.

RST
Special seal with contact on the chamfer of the inner ring.

RSL
Special seal with contact in the inner ring groove.

Shields (Standard Bearings)

Assembly of the Components

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TECHNICAL INFORMATION Bearing Protection - Shields Shields are used to protect the internal parts of the bearing against contamination by dust, liquid and gaseous particles. The shields help contain the lubricant in the bearing. They are fixed to the outer ring and have a rubbing or non-rubbing seal to the inner ring. Non-contact shields Pressed steel Z shields are pressed into the bearing and protect it against contamination by dust and solid particles. Non-contact seals (RSF, RSI) provide the same advantages as shields, as they have no influence on the friction torque and on the admissible limiting speeds and offer even better protection. The design and technical features of non-rubbing seals are identical to those offered by rubbing seals. Contact shields The seals (RSR, RSV, RSL, RST) are in contact with the inner ring and thus offer better protection against contamination by dust, liquid and gaseous particles. These seals of synthetic material are stiffened by a zinc-steel core and pressed into the bearing. The friction of the sealing lip on the inner ring increases the torque and reduces slightly the admissible limiting speeds. The use of RSR, RSL, RST and RSF synthetic seals is limited by the temperature range (-30 to +125°C). For high temperature applications Viton® seals are available. They can withstand temperatures of up to +230°C. Types of available shields:
	Non-contact Shields

	Z Pressed steel shield. Other shield types are available on request.	RSF Non-contact seal, standard colour blue.	RSI Non-contact seal. RSR seal, with reduced outside diameter of the inner ring.