Rotary Shaft Seal 100x180x12 NBR AO/TC - Double Lip Oil Seal

Rotary Shaft Seal 100x180x12 NBR AO/TC - Double Lip Oil Seal

Rotary Shaft Seal 100x180x12 NBR AO/TC is a double-lip radial shaft seal with dimensions 100x180x12 mm, manufactured from NBR (Nitrile Butadiene Rubber). The AO/TC design combines a primary spring-loaded sealing lip with an additional dust lip. The primary lip seals against the rotating shaft, while the secondary lip helps protect the sealing area against dust and external contamination.

Technical data

What does 100x180x12 mm mean?

The dimensions identify the basic installation size of the rotary shaft seal:

100 mm - nominal shaft diameter.

180 mm - nominal housing bore diameter.

12 mm - axial width of the seal.

All three dimensions must be verified when selecting a replacement. Shaft diameter alone is not sufficient to identify the correct rotary shaft seal.

What does AO/TC mean?

AO and TC are designations encountered for radial shaft seals featuring an additional dust lip.

The construction typically includes:

• primary sealing lip

• garter spring supporting the primary lip

• additional dust lip

• elastomer-covered outside diameter

• internal metal reinforcement

The additional lip distinguishes this design from a standard single-lip rotary shaft seal.

Designation systems can vary between manufacturers. For this reason, a replacement should be selected by comparing the actual seal construction and dimensions rather than relying solely on the AO or TC designation.

NBR material

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers for rotary shaft seals and oil seals.

NBR provides good resistance to many mineral oils and greases as well as good wear resistance, making it suitable for a broad range of conventional industrial sealing applications.

Material selection must nevertheless take into account the actual medium, operating temperature, shaft speed and working conditions. NBR is not universally compatible with every fluid or temperature range.

Double-lip design

The 100x180x12 NBR AO/TC seal incorporates two functional lips.

The primary sealing lip operates against the rotating shaft and is supported by a garter spring. Its main function is to retain lubricant or another compatible medium within the sealed system.

The secondary dust lip faces the external environment and helps reduce the ingress of dust, dirt and other contaminants into the primary sealing area.

This additional protection is the principal functional difference between a double-lip AO/TC design and a conventional single-lip oil seal.

AO/TC vs single-lip oil seal

An AO/TC double-lip seal incorporates an additional dust lip.

A conventional single-lip rotary shaft seal essentially uses one primary spring-loaded sealing lip.

Even when both seals have identical 100x180x12 mm dimensions, they should not automatically be considered fully interchangeable. The required seal construction must correspond to the operating conditions and contamination protection requirements of the application.

Selecting a 100x180x12 oil seal

Before purchasing or selecting a replacement, verify:

• 100 mm shaft diameter

• 180 mm housing bore diameter

• 12 mm seal width

• NBR material

• AO/TC double-lip design

• sealed medium

• operating temperature

• shaft surface speed

• shaft sealing surface condition

• pressure conditions

• required protection against external contamination

Identical dimensions alone do not guarantee that every 100x180x12 oil seal is technically interchangeable.

Installation

Before installation, clean the shaft and housing bore thoroughly. The shaft surface that contacts the sealing lip should be free from sharp edges, burrs and damage that could cut or prematurely wear the elastomer.

The sealing lip should be prepared according to the requirements of the particular application and lubricant. The seal should be pressed into the housing evenly and without tilting.

Avoid direct impact on the sealing lip and protect it from sharp shaft edges during installation.

FAQ - Rotary Shaft Seal 100x180x12 NBR AO/TC

What are the dimensions of this oil seal?

The seal has a nominal shaft diameter of 100 mm, housing bore diameter of 180 mm and width of 12 mm. Its complete dimensions are 100x180x12 mm.

What material is the seal made from?

The sealing element is manufactured from NBR (Nitrile Butadiene Rubber).

Is the 100x180x12 AO/TC a double-lip oil seal?

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

What is the purpose of the second lip?

The additional lip helps prevent dust, dirt and other external contaminants from reaching the primary sealing lip.

Is an NBR oil seal resistant to oil?

NBR has good resistance to many mineral oils and greases. Compatibility with the specific medium and operating temperature should always be verified before use.

Are AO and TC exactly the same designation?

AO and TC are designations encountered for seals with an additional dust lip, but terminology can differ between manufacturers. The actual construction, dimensions and material should therefore be checked when selecting an equivalent seal.

Can an AO/TC seal be replaced with a single-lip oil seal?

Not automatically. The AO/TC design includes an additional dust lip that a conventional single-lip version does not have. The required construction depends on the operating environment and sealing requirements.

Rotary Shaft Seal 100x180x12 NBR AO/TC - key information

Rotary Shaft Seal 100x180x12 NBR AO/TC is a double-lip oil seal with dimensions 100x180x12 mm, manufactured from NBR. Its construction combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the sealing area against external contamination. Correct selection requires verification of dimensions, material, design and operating conditions.

Available from simmering.pl, a specialist supplier of rotary shaft seals, industrial seals and bearings. Stock in Poland with worldwide shipping.