Rotary Shaft Seal 115x150x12 NBR AO/TC - Double Lip Oil Seal

Rotary Shaft Seal 115x150x12 NBR AO/TC is a double-lip radial shaft seal with dimensions 115x150x12 mm, manufactured from NBR (Nitrile Butadiene Rubber). The AO/TC design features a spring-loaded primary sealing lip and an additional dust lip that helps protect the sealing area against dust, dirt and other external contaminants.

Technical data

What does 115x150x12 mm mean?

The dimensions specify the nominal installation size of the rotary shaft seal:

115 mm - nominal shaft diameter.

150 mm - nominal housing bore diameter.

12 mm - axial width of the seal.

When selecting a replacement, all three dimensions must be verified together with the elastomer material and sealing lip configuration.

What does AO/TC mean?

AO and TC are designations used for double-lip rotary shaft seal designs.

This type of construction typically includes:

• primary sealing lip

• garter spring supporting the primary sealing lip

• additional dust lip

• elastomer-covered outside diameter

• internal metal reinforcement

The primary lip provides the main dynamic seal against the rotating shaft, while the additional lip helps reduce the ingress of dust, dirt and other external contaminants into the primary sealing area.

Seal nomenclature can vary between manufacturers. Therefore, when selecting an equivalent oil seal, the actual construction, material and dimensions should be compared 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. These characteristics make it widely used in conventional industrial sealing systems operating with oil or grease lubrication.

Material selection should always take into account the specific medium, operating temperature, shaft surface speed and other operating conditions.

Double-lip AO/TC design

In the 115x150x12 NBR AO/TC rotary shaft seal, the primary sealing lip operates directly against the surface of the rotating shaft.

A garter spring helps maintain the required contact pressure between the primary sealing lip and the shaft surface.

The secondary lip functions as a dust lip, helping to reduce the ingress of dust and other external contaminants into the operating area of the primary sealing lip.

The elastomer-covered outside diameter provides static sealing between the outer surface of the oil seal and the housing bore.

AO/TC vs A/SC - what is the difference?

The main difference is the sealing lip configuration.

AO/TC - double-lip design with a spring-loaded primary sealing lip and an additional dust lip.

A/SC - single-lip design with a spring-loaded primary sealing lip and no additional dust lip.

Even when two seals have identical dimensions, AO/TC and A/SC versions should not automatically be considered technically equivalent.

Selecting a 115x150x12 oil seal

Before purchasing or selecting a replacement, verify:

• 115 mm shaft diameter

• 150 mm housing bore diameter

• 12 mm width

• NBR material

• AO/TC double-lip design

• sealed medium

• operating temperature

• shaft surface speed

• condition of the shaft sealing surface

• lubrication conditions

• required protection against external contamination

Matching 115x150x12 mm dimensions alone does not guarantee full interchangeability.

Installation and operation

Before installation, thoroughly clean the shaft and housing bore. The shaft surface that contacts the primary sealing lip should be free from sharp edges, burrs, corrosion and other damage.

During installation, protect the sealing lip against cutting, folding or other mechanical damage. The seal should be pressed evenly into the housing without tilting.

The primary sealing lip should face the medium being retained, according to the design of the specific sealing arrangement.

FAQ - Rotary Shaft Seal 115x150x12 NBR AO/TC

What are the dimensions of this oil seal?

The seal has a nominal shaft diameter of 115 mm, housing bore diameter of 150 mm and width of 12 mm. Its complete dimensions are 115x150x12 mm.

What material is the seal made from?

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

Is AO/TC a double-lip oil seal?

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

Does the AO/TC design have a garter spring?

Yes. The primary sealing lip is supported by a garter spring that helps maintain contact with the rotating shaft.

What is the purpose of the additional lip?

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

Is NBR resistant to oil?

NBR provides good resistance to many mineral oils and greases. Compatibility should always be verified for the specific medium, operating temperature and working conditions.

Can an AO/TC oil seal be replaced by an A/SC version?

Not automatically. AO/TC incorporates an additional dust lip, whereas A/SC is a single-lip design. The required configuration should be selected according to the sealing requirements and operating environment.

Can any 115x150x12 oil seal be used as a replacement?

No. In addition to dimensions, the elastomer material, lip configuration, outside diameter design and actual operating conditions must be verified.

Rotary Shaft Seal 115x150x12 NBR AO/TC - key information

Rotary Shaft Seal 115x150x12 NBR AO/TC is a double-lip oil seal with dimensions 115x150x12 mm, manufactured from NBR. The AO/TC design combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the primary sealing area against external contamination. Correct selection requires verification of dimensions, material, seal design and operating conditions.

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