NBR Oil Seal 24x35x5.5 AO/TC Double Lip

NBR Oil Seal 24x35x5.5 AO/TC Double Lip

NBR Oil Seal 24x35x5.5 AO/TC is a double-lip radial shaft seal with nominal dimensions of 24x35x5.5 mm. It is manufactured from NBR (nitrile butadiene rubber) and features a primary sealing lip together with an additional dust lip that helps reduce the ingress of external contaminants into the sealing area.

Technical data

What does 24x35x5.5 mean?

Radial shaft seal dimensions are specified in the following order:

d x D x B

For the 24x35x5.5 mm oil seal:

• 24 mm - nominal shaft diameter
• 35 mm - nominal outside diameter
• 5.5 mm - nominal seal width

All three dimensions should be checked when selecting a replacement. A 24x35x5.5 mm seal should not automatically be considered interchangeable with a 24x35x5 mm oil seal.

AO/TC design - double-lip oil seal

The AO/TC design incorporates a primary sealing lip and an additional dust lip.

A typical double-lip construction includes:

• primary sealing lip
• additional dust lip
• elastomer-covered outside diameter
• internal metal reinforcement

Profile terminology may vary between manufacturers. For this reason, replacement selection should be based on the actual seal construction and dimensions rather than the AO or TC designation alone.

NBR - nitrile butadiene rubber

NBR (nitrile butadiene rubber) is one of the most widely used elastomers for radial shaft seals. It is commonly used in sealing systems involving many mineral oils, greases and other media compatible with the specific NBR compound.

Actual operating capability depends on factors including:

• operating medium
• temperature
• shaft surface speed
• pressure
• seal design
• specific NBR compound

A universal temperature range should not be assigned to every NBR oil seal without technical data for the specific compound.

Function of the additional dust lip

The additional lip helps reduce the ingress of dust, dirt and other external contaminants toward the primary sealing lip.

This distinguishes the double-lip AO/TC design from basic radial shaft seal designs equipped only with the primary sealing lip.

How to select an NBR Oil Seal 24x35x5.5

Before ordering, verify:

• shaft diameter: 24 mm
• housing bore diameter: 35 mm
• seal width: 5.5 mm
• material: NBR
• AO/TC design
• presence of an additional dust lip
• operating medium
• operating temperature
• shaft speed
• pressure
• shaft surface condition

Particular attention should be paid to the 5.5 mm width, because a 24x35x5 mm seal has a different nominal width.

Shaft surface condition

The condition of the shaft surface in contact with the sealing lip has a direct influence on sealing performance.

Wear, corrosion, scratches or a groove left by the previous seal can affect sealing performance even after a new oil seal has been installed.

Installation

Before installation, clean the shaft and housing bore. The oil seal should be installed evenly and without tilting.

Protect the sealing lip from sharp edges, threads and burrs. The primary sealing lip should also be correctly oriented toward the medium being sealed.

Incorrect installation may damage the sealing lip before the machine begins operation.

Alternative designations and search references

This product may also be searched as:

• Oil Seal 24x35x5.5 NBR
• NBR Oil Seal 24x35x5.5
• Oil Seal 24x35x5.5 AO
• Oil Seal 24x35x5.5 TC
• Double Lip Oil Seal 24x35x5.5
• Shaft Seal 24x35x5.5 NBR
• Rotary Shaft Seal 24x35x5.5
• TC Oil Seal 24x35x5.5
• Radial Shaft Seal 24x35x5.5 NBR

FAQ

What are the dimensions of the 24x35x5.5 oil seal?

The nominal shaft diameter is 24 mm, the outside diameter is 35 mm, and the width is 5.5 mm.

What does 24x35x5.5 mean?

For a radial shaft seal, 24x35x5.5 mm means 24 mm shaft diameter x 35 mm outside diameter x 5.5 mm width.

Is the 24x35x5.5 AO/TC oil seal double-lip?

Yes. The specified AO/TC design incorporates a primary sealing lip and an additional dust lip.

What does NBR mean?

NBR stands for nitrile butadiene rubber, an elastomer widely used for radial shaft seals and other technical sealing components.

Can a 24x35x5.5 oil seal be replaced with a 24x35x5 seal?

Not automatically. The seals differ in nominal width by 0.5 mm. Whether another width can be used depends on the design and available space in the specific sealing system.

Can an NBR oil seal be replaced with FKM?

Not automatically. NBR and FKM have different material properties. The operating medium, temperature and other application conditions should be checked before changing the material.

Are all 24x35x5.5 oil seals identical?

No. Seals with identical nominal dimensions may differ in elastomer material, lip design, outside diameter construction and other design details.

NBR Oil Seal 24x35x5.5 AO/TC - key information

NBR Oil Seal 24x35x5.5 AO/TC is a double-lip radial shaft seal with a nominal 24 mm shaft diameter, 35 mm outside diameter and 5.5 mm width. It is manufactured from NBR and incorporates a primary sealing lip together with an additional dust lip.