Characteristics of CORTECO 12010904

The CORTECO 12010904 radial shaft seal is designed to provide dynamic sealing between a rotating shaft and a stationary housing.

It is suitable for a nominal shaft diameter of 35 mm and a housing bore diameter of 47 mm. The axial width of the seal is 7 mm.

Its primary function is to retain compatible lubricants inside mechanical assemblies while allowing the shaft to rotate.

Key characteristics:

• Manufacturer: CORTECO.

• Manufacturer part number: 12010904.

• Product type: Radial shaft oil seal.

• Nominal dimensions: 35x47x7 mm.

• Material: NBR - nitrile butadiene rubber.

• Sealing profile: BA.

• Single lip construction.

• Spring-loaded primary sealing lip.

• No additional dust exclusion lip in the standard BA profile.

• Rubber-covered outside diameter.

• Internal metal reinforcement.

• Designed for dynamic sealing of rotating shafts.

NBR is widely used in industrial oil seals because of its resistance to many mineral-based lubricating oils and greases. Compatibility must be evaluated for the specific fluid and operating conditions.

Technical Specifications

The dimensional and construction information corresponds to the identified CORTECO product and standard BA profile. Manufacturer-specific values such as exact NBR hardness, maximum shaft surface speed, permissible pressure, operating temperature range and mass are not included without verified product-specific data.

What Does CORTECO 12010904 NBR BA 35x47x7 Mean?

CORTECO - Manufacturer

CORTECO is a brand of the Freudenberg Group, supplying replacement components and sealing solutions for automotive, mechanical and industrial applications.

Its product range includes rotary shaft seals, sealing components and other technical replacement parts.

12010904 - Manufacturer Part Number

12010904 is the catalogue reference identifying this CORTECO rotary shaft seal.

When ordering a replacement, the complete part number should be checked together with the dimensions, material and sealing profile.

Some aftermarket catalogues also contain references such as 12010904B and 82010904. These should not automatically be treated as identical products without checking their catalogue specifications.

NBR - Nitrile Butadiene Rubber

NBR is a synthetic elastomer commonly used in radial shaft oil seals.

Its relevant characteristics include:

• Resistance to many mineral-based lubricating oils.

• Compatibility with numerous conventional lubricating greases.

• Elastic sealing performance under suitable operating conditions.

• Wear resistance when the sealing interface is correctly lubricated.

NBR is not universally compatible with all fuels, solvents, synthetic fluids or hydraulic media.

BA - Single Lip Seal Profile

BA is a sealing profile designation used by CORTECO for radial shaft seals.

The standard BA profile features a primary sealing lip supported by a garter spring and a rubber-covered outside diameter.

Unlike a double lip design, the standard BA profile does not include an additional dust exclusion lip.

35x47x7 mm - Nominal Dimensions

The dimensions identify:

• 35 mm - nominal shaft diameter.

• 47 mm - nominal housing bore diameter.

• 7 mm - axial width of the seal.

These dimensions are essential for product identification but do not independently establish interchangeability with every other 35x47x7 mm oil seal.

Construction and Operating Principle

The CORTECO 12010904 seal provides dynamic sealing between a rotating shaft and a stationary housing.

Primary Sealing Lip

The NBR sealing lip operates in direct contact with the rotating shaft surface.

Its function is to reduce the escape of lubricant from the housing.

Correct sealing performance depends on the lip geometry, shaft surface condition, lubrication and operating parameters.

Garter Spring

A circular garter spring supports the primary sealing lip.

It helps maintain the required radial contact pressure between the elastomeric lip and the shaft.

This contact pressure is important for maintaining the sealing function during operation.

Rubber-Covered Outside Diameter

The rubber-covered outer surface provides static sealing between the seal body and the housing bore.

The nominal housing bore diameter is 47 mm.

The elastomeric covering also helps accommodate minor surface irregularities within the permitted installation tolerances.

Internal Metal Reinforcement

The seal body incorporates metal reinforcement that supports its geometry during installation and operation.

Single Lip Construction

The standard BA profile has one primary sealing lip and no additional dust exclusion lip.

Protection against external contamination must therefore be evaluated as part of the complete machine design.

CORTECO 12010904 BA vs Other 35x47x7 Oil Seal Profiles

Oil seals with identical nominal dimensions may differ in lip construction and sealing performance.

The BASL profile includes an additional dust exclusion lip that helps limit the entry of external contaminants.

However, a 35x47x7 mm BASL seal is not automatically a direct replacement for CORTECO 12010904 BA.

Differences in lip geometry, friction, material and mounting requirements must be considered.

OEM Reference Numbers and Cross-References

The following reference numbers are associated with CORTECO 12010904 in aftermarket parts information.

They are useful for identifying possible replacement applications, but an OEM reference alone does not guarantee compatibility with every vehicle or machine from the listed manufacturer.

These references should be verified against the applicable original equipment catalogue before ordering.

Vehicle compatibility depends on the exact model, engine or drivetrain configuration, production year and installation position.

Typical Applications of CORTECO 12010904

Rotary shaft seals of this construction are used in mechanical systems where a rotating shaft passes through a stationary housing.

Depending on verified equipment compatibility, potential applications include:

• Mechanical transmission shafts.

• Gearbox input and output shafts.

• Differential assemblies.

• Selected engine shaft sealing positions.

• Oil-lubricated bearing housings.

• Agricultural and industrial machinery.

These are general applications of this type of rotary shaft seal. They should not be interpreted as confirmed installation positions for CORTECO 12010904 in every listed vehicle or machine.

For automotive and agricultural equipment, the exact application must be confirmed using the original equipment part number or the CORTECO application catalogue.

Selection and Interchangeability

Before purchasing CORTECO 12010904, verify:

1. Manufacturer part number 12010904.

2. Nominal shaft diameter of 35 mm.

3. Nominal housing bore diameter of 47 mm.

4. Seal width of 7 mm.

5. BA sealing profile.

6. NBR elastomer material.

7. Spring-loaded primary sealing lip.

8. Shaft surface condition and roughness.

9. Operating temperature and shaft speed.

10. Lubricant compatibility.

11. Original equipment reference number.

12. Installation position within the machine.

An oil seal with the same dimensions may have a different material, lip arrangement or outside diameter construction.

Matching dimensions alone do not guarantee full interchangeability.

Installation and Maintenance Recommendations

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

Check for scratches, corrosion, burrs and wear grooves caused by the previous seal.

The seal should be pressed evenly into the housing using a suitable mounting tool.

Mounting force must not be applied directly to the sealing lip or garter spring.

Protect the lip when passing it over threads, keyways or sharp shaft edges.

Before initial operation, lubricate the primary sealing lip with a suitable medium compatible with the application.

In a typical oil-retaining arrangement, the spring-loaded side of the seal should face the lubricant being retained.

Incorrect installation, dry running or a damaged shaft surface may result in premature wear and leakage.

Unused seals should be stored in clean, dry conditions away from direct sunlight, excessive heat and ozone-producing equipment.

Alternative Designations and Search References

The product may be identified using the following formats:

• CORTECO 12010904

• 12010904 CORTECO

• CORTECO 12010904 NBR BA

• CORTECO 12010904 35x47x7

• CORTECO oil seal 35x47x7 NBR

• CORTECO 12010904 rotary shaft seal

• CORTECO 12010904 Simmerring

• Oil seal 35x47x7 NBR BA

References such as 12010904B and 82010904 may also appear in aftermarket catalogues. Their equivalence should be checked against the exact product specification before substitution.

FAQ - CORTECO 12010904

1. What are the dimensions of CORTECO 12010904?

The seal has a nominal shaft diameter of 35 mm, housing bore diameter of 47 mm and width of 7 mm.

2. What does BA mean in CORTECO 12010904?

BA identifies a standard single lip radial shaft seal design with a spring-loaded primary sealing lip and rubber-covered outside diameter, without an additional dust exclusion lip.

3. What material is CORTECO 12010904 made from?

The sealing elastomer is NBR, also known as nitrile butadiene rubber.

4. Is CORTECO 12010904 suitable for engine oil?

NBR is compatible with many mineral-based lubricating oils. Suitability for a specific engine oil depends on its formulation and the operating temperature.

5. Does CORTECO 12010904 fit BMW or Porsche vehicles?

BMW and Porsche reference numbers are associated with this seal in aftermarket parts information. Compatibility must be confirmed using the exact OEM reference and vehicle configuration.

6. Can another 35x47x7 mm oil seal replace CORTECO 12010904?

Not necessarily. The replacement must match the required profile, material, lip construction and operating conditions, in addition to the nominal dimensions.

7. Which direction should CORTECO BA oil seals face during installation?

In a typical oil-retaining application, the side containing the garter spring should face the lubricant being retained. Always follow the equipment manufacturer's installation instructions.

8. Does CORTECO 12010904 have an additional dust lip?

The standard BA profile does not have an additional dust exclusion lip. If external contamination protection is required, a suitable alternative profile must be selected and verified.

CORTECO 12010904 - Key Technical Information

CORTECO 12010904 is a single lip rotary shaft oil seal with dimensions of 35x47x7 mm. Manufactured by CORTECO, it uses NBR elastomer and the BA profile, featuring a spring-loaded primary sealing lip and rubber-covered outside diameter. It is designed to retain compatible lubricants. Vehicle or equipment compatibility must be confirmed using the relevant OEM reference and installation position.

The product is available through simmering.pl, a specialist supplier of industrial oil seals, rotary shaft seals and rolling bearings.

With warehouse operations in Lublin, Poland, simmering.pl supplies industrial maintenance departments, machinery manufacturers and international B2B customers, with worldwide shipping options.