CORTECO 12011207 HNBR BASL 95x120x12 Radial Shaft Seal

Important material verification – HNBR or NBR?

There is a significant distinction between the published catalogue descriptions for CORTECO 12011207.

• The CORTECO sealing catalogue identifies 12011207B as HNBR BASL 95x120x12 mm.

• The CORTECO dimensional catalogue and some older commercial listings identify 12011207 as NBR BASL 95x120x12 mm.

• Replacement-parts catalogues identify 12011207B as HNBR, with an additional dust lip.

This description uses HNBR BASL, consistent with the requested product designation and the catalogue information for reference 12011207B.

The elastomer material should be confirmed against the manufacturer's packaging label or technical documentation before ordering.

NBR and HNBR should not automatically be considered interchangeable.

Technical specifications

OE cross-reference numbers

Replacement-parts catalogues associate the following original equipment references with CORTECO 12011207B.

These references support component identification but do not guarantee compatibility with every machine manufactured by the listed companies.

The exact application must be verified using the original equipment documentation and the relevant mechanical assembly identification.

What does CORTECO 12011207 HNBR BASL 95x120x12 mean?

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

• CORTECO – manufacturer brand.

• 12011207 – product catalogue reference.

• 95 mm – nominal shaft diameter.

• 120 mm – nominal housing bore diameter.

• 12 mm – nominal axial width.

• HNBR – hydrogenated nitrile butadiene rubber.

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

The dimensions describe the nominal installation geometry rather than permissible shaft or housing tolerances.

BASL sealing profile – construction and operating principle

The BASL profile combines lubricant retention with additional protection against external contamination.

Its construction includes four principal elements.

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.

2. Internal metal reinforcement

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

It also supports the correct positioning of the sealing lips 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.

4. Additional dust lip

The secondary dust lip provides an additional barrier against external contamination, including dust and fine particles.

This feature can be particularly useful in agricultural machinery and mechanical assemblies exposed to environmental contamination.

However, an additional dust lip does not mean that the seal is designed for continuous immersion in water or high external pressure.

HNBR material properties

HNBR is produced by hydrogenating nitrile butadiene rubber.

Compared with conventional NBR, appropriately selected HNBR compounds generally provide improved resistance to elevated temperatures, thermal ageing and ozone.

Important characteristics include:

• Compatibility with many oils and lubricating greases.

• Good resistance to thermal ageing.

• Improved ozone resistance compared with conventional NBR.

• Mechanical properties suitable for rotating shaft sealing.

• Potential use in demanding transmission and drive assemblies.

These properties do not imply universal resistance to all fuels, solvents or industrial chemicals.

The exact operating temperature range and chemical compatibility depend on the specific HNBR compound used by the manufacturer.

HNBR versus NBR – material comparison

HNBR should not automatically be replaced with standard NBR solely because the nominal dimensions are identical.

The original equipment requirements and operating conditions must be considered.

BASL versus BA – sealing profile comparison

The additional dust lip can be important in machinery operating in dusty environments.

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

Applications – MASSEY FERGUSON, LANDINI, CLAAS and MERLO

Replacement-parts catalogues associate CORTECO 12011207B with agricultural machinery and mechanical assemblies from MASSEY FERGUSON, LANDINI, CLAAS and MERLO.

The CORTECO dimensional catalogue also indicates a MASSEY FERGUSON application for reference 12011207.

Depending on the original equipment configuration, radial shaft seals of this type may be used in:

• Agricultural transmission assemblies.

• Mechanical drive systems.

• Gearbox shaft sealing positions.

• Rotating shaft mechanisms.

• Machinery requiring additional protection against dust.

These are potential application areas rather than confirmed fitment information for individual machine models.

The exact installation position must be established from the original equipment documentation.

Selection and interchangeability

Before selecting CORTECO 12011207, verify:

1. Nominal shaft diameter – 95 mm.

2. Nominal housing bore diameter – 120 mm.

3. Installation width – 12 mm.

4. Required BASL sealing profile.

5. Presence of an additional dust lip.

6. HNBR material specification for the ordered variant.

7. Compatibility with the operating medium.

8. Operating temperature and shaft rotational speed.

9. Pressure within the sealed chamber.

10. Shaft surface condition and housing bore tolerances.

11. Original equipment reference.

12. Documentation for the specific mechanical assembly.

Matching dimensions alone does not guarantee interchangeability.

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

Alternative designations and cross-references

Common English technical designations include:

• CORTECO 12011207

• CORTECO 12011207B

• CORTECO 82011207

• CORTECO 12011207 HNBR BASL

• CORTECO HNBR BASL 95x120x12

• CORTECO 95x120x12 Radial Shaft Seal

• CORTECO 95x120x12 Oil Seal

• Radial Shaft Seal 95x120x12 HNBR BASL

• Rotary Shaft Seal 95x120x12 with Dust Lip

Replacement-parts catalogues also identify CORTECO 12011047B as an earlier reference superseded by 12011207B.

However, the earlier product may differ in elastomer material or sealing profile.

Before substitution, the original application's material and construction requirements must be verified.

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 lips 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.

The additional dust lip must also be considered when preparing the mating surfaces and following the manufacturer's lubrication instructions.

Incorrect installation, excessive shaft runout, unsuitable surface roughness or inadequate lubrication may result in premature wear and lubricant leakage.

FAQ – Frequently asked questions

1. What are the dimensions of CORTECO 12011207?

The nominal dimensions are 95x120x12 mm, corresponding to a 95 mm shaft diameter, 120 mm housing bore diameter and 12 mm axial width.

2. Is CORTECO 12011207 manufactured from HNBR?

The CORTECO sealing catalogue and replacement-parts catalogues identify HNBR for reference 12011207B. Some older listings identify NBR for 12011207, so the material must be confirmed for the specific ordered variant.

3. What does the BASL sealing profile mean?

BASL identifies a radial shaft seal with a rubber-covered outer diameter, spring-loaded primary sealing lip and additional dust lip.

4. Does CORTECO 12011207 have an additional dust lip?

Yes. Replacement-parts catalogues confirm an additional dust lip for reference 12011207B.

5. What MASSEY FERGUSON OE reference corresponds to this seal?

The listed OE reference is 392121X1.

6. What CLAAS and MERLO OE references are associated with the product?

The listed references are CLAAS 02339500 and MERLO 026621.

7. Can CORTECO 12011207B replace 12011047B?

Replacement-parts catalogues indicate this supersession. However, material differences, sealing profile and operating requirements should be verified before substitution.

8. Can HNBR be replaced with conventional NBR?

Not automatically. The materials may differ in resistance to temperature, ageing and operating conditions.

CORTECO 12011207 – key information

CORTECO 12011207B is an HNBR radial shaft seal with nominal dimensions of 95x120x12 mm and a BASL profile featuring a spring-loaded primary sealing lip and additional dust lip. OE references include CLAAS 02339500, LANDINI and MASSEY FERGUSON 392121X1, and MERLO 026621. Older catalogues identify NBR for 12011207, so the exact elastomer specification must be confirmed.

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.