CORTECO 12012397 NBR BASLX7 25x53.5x10/14 Radial Shaft Seal

Technical specifications

The nominal dimensions, BASLX7 profile and NBR material designation are identified in the dimensional catalogue.

Information concerning the additional dust lip and garter spring appears in commercial descriptions of the version identified as ELE.

What does CORTECO 12012397 NBR BASLX7 25x53.5x10/14 mean?

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

• CORTECO – manufacturer brand.

• 12012397 – product catalogue reference.

• 25 mm – nominal shaft diameter.

• 53.5 mm – nominal housing bore diameter.

• 10 mm – first axial dimension.

• 14 mm – second axial dimension.

• NBR – nitrile butadiene rubber.

• BASLX7 – manufacturer-specific sealing profile designation.

The dimensions 10/14 mm represent two separate axial measurements, not a width tolerance range.

The exact position of any sealing elements extending beyond the main seal body should be verified using the manufacturer's technical drawing.

BASLX7 sealing profile – construction and operating principle

1. Primary sealing lip

The primary function of the radial shaft seal is to limit lubricant leakage where a rotating shaft passes through a housing.

For the BASLX7 profile, the geometry of the primary sealing lip, its contact-force mechanism and the condition of the mating surface must be considered.

2. Additional dust lip

Commercial descriptions of CORTECO 12012397B indicate a double-lip construction incorporating an additional dust lip.

The purpose of this feature is to limit the entry of external contamination into the primary sealing area.

However, this construction information appears in listings associated with the ELE material designation.

The exact configuration should therefore be confirmed for the material version being ordered.

3. Garter spring

Commercial listings also indicate a spring-loaded primary sealing lip.

Because these descriptions refer to the version identified as ELE, the exact spring arrangement should be verified before applying the information to the requested NBR version.

4. Dual axial dimensions – 10/14 mm

The dimensions 10/14 mm require consideration of both the main installation width and the complete axial geometry of the seal.

A conventional 25x53.5x10 mm seal should not automatically be used as a replacement without verifying the available installation space and the construction of the original component.

NBR – material properties

NBR is a synthetic elastomer commonly used in sealing applications involving many mineral oils and lubricating greases.

Typical properties of appropriately selected NBR compounds include:

• Good resistance to many mineral oils.

• Compatibility with numerous bearing greases.

• Mechanical properties suitable for shaft sealing.

• Potential use in industrial equipment and rotating mechanical assemblies.

The exact temperature resistance, chemical compatibility and wear characteristics depend on the specific NBR compound.

Maximum operating temperature, rotational speed and pressure should not be assigned to this product solely on the basis of general NBR material properties.

NBR versus ELE – why the distinction matters

The ELE designation should not automatically be interpreted as NBR.

Before publishing a definitive material specification for CORTECO 12012397B, the current manufacturer documentation should be checked.

Catalogue application – WM

The CORTECO dimensional catalogue associates reference 12012397 with the application code WM.

Without additional manufacturer documentation, this abbreviation should not be expanded into a specific equipment manufacturer, machine type or installation position.

The product should be selected using the complete manufacturer reference, dimensions, material specification, sealing profile and requirements of the relevant mechanical assembly.

Selection and interchangeability

Before selecting CORTECO 12012397, verify:

1. Nominal shaft diameter – 25 mm.

2. Nominal housing bore diameter – 53.5 mm.

3. First axial dimension – 10 mm.

4. Second axial dimension – 14 mm.

5. BASLX7 sealing profile.

6. NBR or ELE material designation.

7. Primary sealing lip construction.

8. Presence of an additional dust lip.

9. Compatibility with the operating lubricant.

10. Requirements of the equipment and original part reference.

Matching nominal dimensions of 25x53.5x10/14 mm does not automatically establish technical interchangeability.

The replacement must also meet the original application's material, profile and installation requirements.

Alternative designations and search references

Common English technical designations include:

• CORTECO 12012397

• CORTECO 12012397B

• CORTECO 12012397 NBR BASLX7

• CORTECO NBR BASLX7 25x53.5x10/14

• CORTECO ELE BASLX7 25x53.5x10/14 – alternative catalogue designation

• CORTECO 25x53.5x10/14 Oil Seal

• CORTECO BASLX7 Radial Shaft Seal

• NBR Shaft Seal 25x53.5x10/14

• CORTECO 12012397 Rotary Shaft Seal

• CORTECO BASLX7 Oil Seal

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

Installation and operating recommendations

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

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

Both axial dimensions must be considered to prevent interference with adjacent mechanical components.

The correct installation orientation should be determined from the equipment manufacturer's documentation.

The mating surfaces should be prepared and lubricated according to the requirements of the specific application.

Incorrect installation, unsuitable operating conditions or incompatible lubricants may result in premature wear and leakage.

FAQ – Frequently asked questions

1. What are the dimensions of CORTECO 12012397?

The nominal dimensions are 25x53.5x10/14 mm.

2. What material is specified in the CORTECO dimensional catalogue?

The dimensional catalogue identifies NBR – nitrile butadiene rubber.

3. Why do other catalogues identify the material as ELE?

Some documentation and commercial listings describe reference 12012397B as ELE BASLX7. This discrepancy requires confirmation using current manufacturer documentation.

4. What does the BASLX7 sealing profile mean?

BASLX7 identifies a specific CORTECO sealing design. The exact construction should be verified using the manufacturer's technical drawing.

5. Does CORTECO 12012397 have an additional dust lip?

Commercial descriptions of reference 12012397B indicate an additional dust lip. This feature should be confirmed for the exact material version being ordered.

6. Does 10/14 mm indicate a width tolerance?

No. These are two separate axial dimensions of the seal construction.

7. Can CORTECO 12012397 be replaced with a standard 25x53.5x10 mm seal?

Not without verification. The complete axial geometry, sealing profile and elastomer material must be compared.

8. Is an OE reference available for CORTECO 12012397?

No specific original equipment reference has been confirmed in the catalogue information considered here.

CORTECO 12012397 – key information

CORTECO 12012397 is a radial shaft seal with nominal dimensions of 25x53.5x10/14 mm and a BASLX7 sealing profile. The dimensional catalogue specifies NBR and application code WM, while other catalogues identify ELE for reference 12012397B. Material specification, sealing lip construction and both axial dimensions must be verified before selection. Matching nominal diameters alone does not guarantee interchangeability.

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.