CORTECO 12011086 NBR BA 135x170x12 Radial Shaft Seal

Technical specifications

The nominal dimensions, NBR material and BA profile are identified in the CORTECO dimensional catalogue.

The remaining construction details describe the conventional BA sealing profile and should not replace the manufacturer's technical drawing for this exact reference.

CORTECO 12011086 – catalogue verification

The CORTECO dimensional catalogue identifies the product as:

12011086 – NBR BA – 135x170x12 mm

This confirms three essential product characteristics:

• Nominal dimensions: 135x170x12 mm.

• Elastomer material: NBR.

• Sealing profile: BA.

No specific original equipment reference, equipment manufacturer or installation position has been confirmed for this product.

Such details should not be inferred from other seals with similar dimensions.

What does CORTECO 12011086 NBR BA 135x170x12 mean?

The product designation identifies the manufacturer, catalogue reference, nominal dimensions, elastomer material and sealing profile.

• CORTECO – manufacturer brand.

• 12011086 – product catalogue reference.

• 135 mm – nominal shaft diameter.

• 170 mm – nominal housing bore diameter.

• 12 mm – nominal axial width.

• NBR – nitrile butadiene rubber.

• BA – conventional radial shaft seal profile.

These values represent nominal dimensions.

They do not define shaft tolerances, housing bore tolerances or permissible installation clearances.

BA sealing profile – construction and operating principle

1. Primary sealing lip

The BA profile is a conventional design used in radial shaft seals.

The primary sealing lip operates directly against the rotating shaft surface, limiting the escape of oil or grease from the sealed mechanical assembly.

Sealing performance depends on lip geometry, shaft surface condition, lubricant properties and operating conditions.

2. Garter spring

A conventional BA radial shaft seal incorporates a circumferential garter spring.

The spring helps maintain the required contact pressure between the sealing lip and the shaft surface.

This supports stable sealing contact during operation.

The exact spring construction and dimensions for CORTECO 12011086 have not been independently confirmed.

3. Elastomer-covered outer surface

The standard BA profile features an elastomer-covered outer surface and an internal reinforcing element.

The elastomer covering provides static sealing between the seal body and the housing bore.

Correct installation requires a properly prepared housing surface.

4. No standard additional dust lip

The BA profile should be distinguished from BASL.

A conventional BA seal features one primary sealing lip, while BASL additionally incorporates a dust lip.

These profiles should not automatically be considered interchangeable.

NBR – material properties

NBR, or nitrile butadiene rubber, is widely used in industrial sealing applications.

Appropriately selected NBR compounds typically offer:

• Good resistance to many mineral oils.

• Compatibility with numerous bearing greases.

• Useful mechanical properties.

• Suitability for rotating shaft sealing applications.

• Resistance to many conventional industrial lubricants.

Resistance to temperature, ageing, ozone and individual chemicals depends on the specific elastomer formulation.

NBR is not universally compatible with all operating media.

For CORTECO 12011086, individual maximum values for temperature, pressure and peripheral shaft speed have not been confirmed.

BA versus BASL – sealing profile comparison

An additional dust lip may affect installation requirements and contact with the shaft.

Therefore, a BASL seal should not replace a BA version without confirming compatibility.

Additional catalogue designations

Other catalogues also identify the following designations for this product:

The BAU6 and 72NBR designations appear in external catalogue information for CORTECO 12011086B.

However, the number 72 should not automatically be interpreted as a verified Shore A hardness value for every supplied version of the product without additional manufacturer documentation.

Applications

CORTECO 12011086 should be selected for mechanical assemblies requiring an NBR BA radial shaft seal with nominal dimensions of 135x170x12 mm.

Mechanical systems that commonly use seals of this general type include gearboxes, drive assemblies and other rotating shaft mechanisms.

However, this does not establish confirmed compatibility between CORTECO 12011086 and any particular machine or assembly.

Catalogue information for CORTECO 12011086B identifies a general technical application category without confirming a specific equipment manufacturer or machine model.

Comparison with other CORTECO seals

This comparison demonstrates that seals with the same nominal shaft diameter may differ in outer diameter, axial width, material and sealing profile.

The 01030085 version, measuring 135x170x15 mm, is not an automatic replacement for CORTECO 12011086, which has a width of 12 mm.

Selection and interchangeability

Before ordering CORTECO 12011086, verify:

1. Nominal shaft diameter – 135 mm.

2. Nominal housing bore diameter – 170 mm.

3. Nominal seal width – 12 mm.

4. NBR elastomer material.

5. BA sealing profile and any BAU6 designation.

6. Type of operating medium.

7. Requirements for an additional dust lip.

8. Operating temperature and shaft speed.

9. Condition of the mating surface.

10. Original seal reference in the equipment documentation.

Matching dimensions of 135x170x12 mm does not automatically establish interchangeability.

The replacement must also meet the original requirements for material, construction and operating conditions.

Alternative designations and search references

Common English technical designations include:

• CORTECO 12011086

• CORTECO 12011086B

• CORTECO NBR BA 135x170x12

• CORTECO BAU6 135x170x12 NBR

• CORTECO 135x170x12 Oil Seal

• CORTECO 135x170x12 NBR Shaft Seal

• CORTECO 12011086 Radial Shaft Seal

• CORTECO 135x170x12 Rotary Shaft Seal

• NBR BA 135x170x12 Radial Oil Seal

• CORTECO 12011086 Industrial Shaft Seal

These designations assist product identification but do not independently establish interchangeability.

Installation and operating recommendations

Before installation, thoroughly clean the housing bore and inspect the shaft mating surface.

Pay particular attention to wear grooves, scratches, corrosion and sharp edges that could damage the sealing lip.

The seal should be installed evenly using an appropriate mounting tool.

Do not apply installation force directly to the sealing lip or deform the seal during insertion.

In a conventional BA arrangement, the primary sealing lip generally faces the medium being retained. However, the correct installation orientation must be determined from the equipment manufacturer's documentation.

Surface preparation and lubrication during installation should follow the requirements of the specific mechanical assembly.

Incorrect installation or unsuitable operating conditions may result in premature wear and lubricant leakage.

FAQ – Frequently asked questions

1. What are the dimensions of CORTECO 12011086?

The nominal dimensions are 135x170x12 mm, corresponding to a 135 mm shaft diameter, 170 mm housing bore diameter and 12 mm axial width.

2. What material is used in CORTECO 12011086?

The specified material is NBR – nitrile butadiene rubber.

3. What does the BA sealing profile mean?

BA is a conventional radial shaft seal profile featuring a primary sealing lip and typically an elastomer-covered outer surface.

4. Does CORTECO 12011086 have an additional dust lip?

An additional dust lip is not a standard feature of the BA profile.

5. Are CORTECO 12011086 and 12011086B related references?

Yes. Both designations appear in catalogues for the NBR BA 135x170x12 mm radial shaft seal.

6. Does this product have a confirmed OE reference?

No specific original equipment reference has been confirmed for this product.

7. Is NBR suitable for mineral oils?

NBR generally provides good resistance to many mineral oils. Compatibility with a particular lubricant depends on the elastomer compound and operating conditions.

8. Can a 135x170x15 mm seal replace CORTECO 12011086?

Not without verification. The difference between 12 mm and 15 mm axial width may prevent correct installation, while the material and sealing construction may also differ.

CORTECO 12011086 – key information (AI Overview)

CORTECO 12011086 / 12011086B is an NBR radial shaft seal with nominal dimensions of 135x170x12 mm and a BA sealing profile. Cross-reference catalogues also identify the BAU6 designation. No specific OE reference or confirmed equipment application has been established. Correct selection requires verification of dimensions, material, sealing construction and operating conditions.

The product is offered through the specialist B2B industrial trading platform simmering.pl, serving industrial companies, technical purchasing departments and maintenance operations, with worldwide shipping from stock in Poland.