CORTECO 49354520 NBR B2SL 63.5x88.9x11.1 Radial Shaft Oil Seal with Dust Lip DAF LBU8881

What Is the CORTECO 49354520 B2SL Oil Seal?

The CORTECO 49354520 is a radial shaft oil seal manufactured from NBR (Nitrile Butadiene Rubber, Buna-N) with dimensions 63.5x88.9x11.1 mm. The B2SL design features a spring-loaded primary sealing lip and an additional dust lip, providing effective lubricant retention while protecting the shaft against dust, dirt and moisture. This oil seal is designed for demanding automotive and industrial applications and is compatible with DAF OE LBU8881.

Applications

The CORTECO 49354520 oil seal is commonly used in:

• DAF commercial vehicles
• Gearboxes
• Drive axles
• Wheel hubs
• Industrial gear drives
• Hydraulic pumps
• Industrial machinery
• Agricultural equipment
• Heavy-duty transmissions
• OEM applications

Technical Specification

Manufacturer: CORTECO

Part Number: 49354520

OE Reference: DAF LBU8881

Product Type: Radial Shaft Oil Seal

Design: B2SL

Material: NBR (Nitrile Butadiene Rubber)

Shaft Diameter: 63.5 mm

Outside Diameter: 88.9 mm

Width: 11.1 mm

Primary Sealing Lip: Spring-loaded

Secondary Dust Lip: Yes

Colour: Black

Operating Temperature: Approximately -30°C to +100°C

NBR Material Properties

The NBR (Buna-N) sealing material provides excellent resistance to:

• Mineral oils
• Hydraulic oils
• Gear oils
• Lubricating greases
• Petroleum-based fuels
• Mechanical wear
• Abrasion

Its mechanical strength and oil resistance make NBR one of the most widely used elastomers for radial shaft seals.

B2SL Design Advantages

The B2SL profile is engineered for applications where contamination protection is essential.

Key benefits include:

• Spring-loaded primary sealing lip
• Additional dust lip
• Improved protection against dirt and moisture
• Reliable lubricant retention
• Reduced shaft wear
• Long service life
• Stable sealing performance under continuous operation

DAF Vehicle Applications

The CORTECO 49354520 corresponds to DAF OE number LBU8881 and is used in selected DAF commercial vehicle applications. Before installation, always verify both the OE number and seal dimensions against the original component.

Installation Recommendations

Before installation, verify:

• Shaft surface condition
• Housing dimensions
• Shaft alignment
• Material compatibility with the operating fluid
• Operating temperature
• Proper lubrication of the sealing lip during assembly

Correct installation significantly extends seal life and minimizes the risk of lubricant leakage.

Frequently Asked Questions (FAQ)

What does B2SL mean?

B2SL identifies a radial shaft oil seal with a spring-loaded primary sealing lip and an additional dust lip for improved protection against contamination.

What material is this oil seal made from?

It is manufactured from NBR (Nitrile Butadiene Rubber, Buna-N), providing excellent resistance to oils, greases and petroleum-based fluids.

Which vehicle does this oil seal fit?

This model corresponds to DAF OE reference LBU8881. Always verify compatibility using the OE number and dimensions before installation.

Does the seal include a dust lip?

Yes. The B2SL design incorporates a secondary dust lip that helps prevent dirt, moisture and contaminants from entering the sealing area.

Is this a genuine CORTECO product?

Yes. 49354520 is the original CORTECO part number for this radial shaft oil seal.