CORTECO 12011024 NBR BA 75x110x12 Radial Shaft Seal

Technical specifications

Catalogue identification: CORTECO identifies reference 12011024 as an NBR BA radial shaft seal with nominal dimensions of 75x110x12 mm. The designation 12011024B also appears in replacement-parts catalogues.

What does CORTECO 12011024 NBR BA 75x110x12 mean?

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

• CORTECO – manufacturer brand.

• 12011024 – product catalogue reference.

• 75 mm – nominal shaft diameter.

• 110 mm – nominal housing bore diameter.

• 12 mm – nominal axial width.

• NBR – nitrile butadiene rubber.

• BA – radial shaft seal profile with a rubber-covered outer diameter and spring-loaded primary sealing lip.

The dimensions 75x110x12 mm describe the nominal installation geometry. They do not specify the permissible shaft or housing tolerances.

BA sealing profile – construction and operating principle

The BA profile is a conventional radial shaft sealing design used in rotating shaft applications.

Its primary function is to retain lubricant within a mechanical assembly while the shaft rotates.

1. Rubber-covered outer diameter

The elastomeric outer surface provides static sealing between the component and the housing bore.

A correctly selected interference fit helps maintain the seal in position and limits leakage around its outer circumference.

The rubber covering can accommodate minor housing surface irregularities within the manufacturer's permissible tolerances.

2. Internal metal reinforcement

The metal reinforcing insert provides dimensional stability and helps maintain the shape of the seal during installation and operation.

It also supports the correct positioning of the sealing lip relative to the shaft.

3. Spring-loaded primary sealing lip

The primary sealing lip maintains contact with the rotating shaft surface.

A garter spring helps maintain the required radial contact force, supporting lubricant retention during operation.

The standard BA profile does not incorporate an additional dust lip.

Where additional protection against external contamination is required, a different sealing profile may be necessary.

NBR material properties

NBR is a synthetic elastomer produced from acrylonitrile and butadiene.

It is widely used in radial shaft seals because of its compatibility with many mineral oil-based lubricants.

Typical characteristics of appropriately selected NBR compounds include:

• Good resistance to many mineral oils.

• Compatibility with numerous industrial lubricating greases.

• Suitable mechanical properties for rotating shaft sealing.

• Application in mechanical transmissions and drive assemblies.

• Availability of different compounds for specific operating conditions.

NBR is not universally resistant to all fuels, solvents or industrial chemicals.

Its resistance to ozone and certain atmospheric influences is limited.

The exact operating temperature range, chemical compatibility and service life depend on the specific NBR compound and operating conditions.

BA, BASL and B1 sealing profiles compared

Seals with identical nominal dimensions but different profiles should not automatically be considered interchangeable.

The correct selection depends on housing design, operating medium, contamination exposure and installation requirements.

Selection and interchangeability

Before selecting CORTECO 12011024, verify:

1. Nominal shaft diameter – 75 mm.

2. Nominal housing bore diameter – 110 mm.

3. Installation width – 12 mm.

4. Required BA sealing profile.

5. Compatibility of NBR with the operating medium.

6. Operating temperature and shaft rotational speed.

7. Pressure within the sealed chamber.

8. Shaft surface condition and roughness.

9. Requirements for protection against external dust.

10. Original equipment documentation or manufacturer part number.

Matching dimensions alone does not guarantee interchangeability.

The replacement must also provide the required sealing profile, material compatibility, directional characteristics and operating performance.

Typical industrial applications

Radial shaft seals with a BA profile and nominal dimensions of 75x110x12 mm may be used in appropriately designed:

• Mechanical gearboxes.

• Industrial gear reducers.

• Drive assemblies.

• Bearing housings.

• Production machinery.

• Rotating shaft mechanisms requiring oil retention.

These are general examples of applications for this type of sealing construction.

They do not represent a confirmed list of machines or vehicles compatible with CORTECO 12011024.

The CORTECO dimensional catalogue does not identify a specific vehicle brand or OE reference for this product.

Alternative designations and search references

Common English technical designations include:

• CORTECO 12011024

• CORTECO 12011024B

• CORTECO 12011024 NBR BA

• CORTECO 75x110x12 NBR BA

• CORTECO 75x110x12 Oil Seal

• CORTECO 12011024 Radial Shaft Seal

• CORTECO 75x110x12 BA Rotary Shaft Seal

• Radial Shaft Seal 75x110x12 NBR BA

• Rotary Oil Seal 75x110x12 NBR

The reference 12011024B appears in replacement-parts catalogues. The current manufacturer designation should be confirmed before ordering.

Installation and operating recommendations

Before installation, clean the housing bore and inspect the shaft surface for corrosion, scratches, burrs and excessive wear.

The seal should be installed evenly using suitable mounting tools.

Installation force should be applied to the appropriate structural area of the seal.

Avoid applying direct pressure to the sealing lip or damaging the garter spring.

In conventional applications, the spring-loaded primary sealing lip faces the medium being retained unless the equipment documentation specifies otherwise.

Before operation, ensure appropriate lubrication at the contact area between the sealing lip and shaft.

Dry running, excessive shaft runout, unsuitable surface roughness and incorrect installation may result in premature wear and lubricant leakage.

FAQ – Frequently asked questions

1. What are the dimensions of CORTECO 12011024?

The nominal shaft diameter is 75 mm, the housing bore diameter is 110 mm, and the axial width is 12 mm.

2. What does the BA sealing profile mean?

BA identifies a radial shaft seal with a rubber-covered outer diameter and a spring-loaded primary sealing lip.

3. Does CORTECO 12011024 have an additional dust lip?

No. The standard BA profile does not incorporate an additional dust lip.

4. What material is used in CORTECO 12011024?

The seal uses NBR, or nitrile butadiene rubber, commonly employed in oil sealing applications.

5. Are CORTECO 12011024 and 12011024B the same product?

Available catalogues associate both references with dimensions of 75x110x12 mm and a BA sealing profile. The current manufacturer reference should be confirmed before ordering.

6. Can CORTECO 12011024 be used in an industrial gearbox?

It may be suitable for an appropriately designed gearbox if the dimensions, sealing profile, material and operating conditions meet the equipment requirements.

7. Can a BASL seal replace the BA profile?

Not automatically. BASL incorporates an additional dust lip, which may affect installation requirements and operating characteristics.

8. Is NBR resistant to gearbox oil?

Appropriately selected NBR compounds are compatible with many mineral oil-based lubricants. Compatibility with a specific gearbox oil must be verified.

CORTECO 12011024 – key information

CORTECO 12011024 is an NBR radial shaft seal with nominal dimensions of 75x110x12 mm and a BA profile. Its construction features a rubber-covered outer diameter and spring-loaded primary sealing lip without an additional dust lip. The designation 12011024B also appears in replacement-parts catalogues. Correct selection requires verification of dimensions, lubricant compatibility 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.