CORTECO 12011807 NBR BASLSF 30x52/65x10/15 mm Radial Shaft Seal

Technical specifications

Important: The complete dimensional designation 30x52/65x10/15 mm must be preserved. Omitting the dimensions after the slashes may result in selecting an incorrect replacement.

Material identification

The CORTECO dimensional catalogue identifies the product as NBR BASLSF. However, another commercial listing uses the material designation ELE BASLSF for the same reference.

Because of this discrepancy, the exact material specification should be confirmed against current CORTECO documentation before final technical approval.

CORTECO 12011807 - catalogue identification

The CORTECO dimensional catalogue identifies the product as:

12011807 - NBR BASLSF - 30x52/65x10/15 mm - WM

The abbreviation WM should not automatically be interpreted as a particular machine manufacturer or model without additional documentation.

What do the dimensions 30x52/65x10/15 mm mean?

Unlike a conventional designation such as 30x52x10 mm, CORTECO 12011807 incorporates two outer diameter dimensions and two axial dimensions.

• 30 mm - nominal shaft diameter.

• 52 mm - first nominal outer diameter dimension.

• 65 mm - second nominal outer diameter dimension.

• 10 mm - first nominal axial dimension.

• 15 mm - second nominal axial dimension.

Without a detailed technical drawing, it is not possible to establish definitively which outer dimension corresponds to the housing seating surface and which may relate to a flange or another construction element.

For this reason, the full designation 30x52/65x10/15 mm must be retained when identifying or selecting a replacement seal.

BASLSF sealing profile - construction and operating principle

1. Primary sealing lip

The BASL profile family includes radial shaft seals with a primary sealing lip.

The lip operates against the rotating shaft surface and helps limit oil or grease leakage from the sealed mechanical assembly.

Sealing performance depends on the condition of the shaft contact surface, appropriate lubrication and compatibility with the operating medium.

2. Additional protective lip

A conventional BASL construction incorporates an additional dust lip.

Its function is to help limit the entry of external contaminants into the area around the primary sealing lip.

The precise protective lip geometry of CORTECO 12011807 should be confirmed using the manufacturer's technical drawing.

3. Garter spring

A typical BASL radial shaft seal uses a circumferential garter spring to help maintain contact pressure between the primary sealing lip and the shaft.

The exact spring construction of CORTECO 12011807 requires confirmation from CORTECO technical documentation.

4. Additional SF designation

The SF designation forms part of the complete BASLSF construction code.

Without a detailed CORTECO technical drawing, it should not be assigned a specific flange shape, protective cover or other structural feature.

BASLSF must be treated as a distinct sealing construction, rather than automatically considered equivalent to a conventional BASL seal.

NBR - technical material properties

NBR, or nitrile butadiene rubber, is a technical elastomer widely used in industrial rotating shaft sealing applications.

Appropriately selected NBR compounds typically offer:

• Good resistance to many mineral oils.

• Compatibility with numerous industrial greases.

• Suitability for oil-lubricated mechanical assemblies.

• Useful mechanical properties.

• Wear resistance dependent on the elastomer compound and operating conditions.

NBR is not compatible with every chemical substance or operating medium.

Compatibility with the specific lubricant or fluid must be assessed individually.

Individual maximum values for operating temperature, pressure and peripheral shaft speed have not been confirmed for CORTECO 12011807.

BASLSF versus BA and BASL - sealing profile comparison

A conventional BA or BASL seal measuring 30x52x10 mm must not automatically be considered interchangeable with CORTECO 12011807.

Applications of CORTECO 12011807

Catalogue application code WM

The CORTECO dimensional catalogue lists WM as the application code associated with reference 12011807.

However, the exact equipment model, OE reference and installation position have not been confirmed.

Consequently, the seal should not be assigned to a specific machine solely on the basis of the WM abbreviation.

Rotating shaft assemblies

Radial shaft seals from the BASL profile family are used in appropriately specified mechanisms requiring lubricant retention and protection against external contamination.

For CORTECO 12011807, compatibility with the non-standard 30x52/65x10/15 mm geometry is particularly important.

These are general applications of this type of sealing construction, not additional confirmed applications for the exact CORTECO reference.

Comparison with other CORTECO radial shaft seals

The following products are listed in the CORTECO dimensional catalogue among seals with a nominal inner diameter of 30 mm.

This comparison illustrates that seals with the same nominal shaft diameter may differ significantly in outer geometry, axial dimensions and sealing profile.

None of the listed products should automatically be considered a confirmed replacement for CORTECO 12011807.

Selection and interchangeability

Before ordering CORTECO 12011807, verify:

1. CORTECO catalogue reference 12011807.

2. Complete BASLSF sealing profile designation.

3. Nominal shaft diameter - 30 mm.

4. First nominal outer diameter dimension - 52 mm.

5. Second nominal outer diameter dimension - 65 mm.

6. Nominal axial dimensions - 10/15 mm.

7. Elastomer material specified for the actual product.

8. Housing geometry, including any steps or flanges.

9. Type of operating medium and service conditions.

10. Original equipment reference and installation position.

The most important selection criterion is compatibility with the complete sealing construction, not merely the shaft diameter and primary outer diameter.

Alternative designations and product identification

The product may be identified in technical documentation and catalogue searches using the following designations:

• CORTECO 12011807

• CORTECO 12011807 NBR BASLSF

• CORTECO BASLSF 30x52/65x10/15

• CORTECO 30x52/65x10/15 Oil Seal

• CORTECO 12011807 Radial Shaft Seal

• CORTECO 12011807 NBR Oil Seal

• CORTECO 30x52/65x10/15 Shaft Seal

• CORTECO BASLSF Rotary Shaft Seal

• NBR BASLSF 30x52/65x10/15 Simmerring

These alternative designations are intended to support identification of the same product.

They do not establish additional interchangeable part numbers or OE references.

Installation and operating recommendations

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

Inspect the following:

• Condition of the shaft contact surface.

• Presence of scratches, corrosion and wear grooves.

• Housing dimensions and geometry.

• Required installation depth.

• Compatibility with the original sealing profile.

• Correct installation orientation.

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

Installation force must not be applied directly to the sealing lips.

For a construction measuring 30x52/65x10/15 mm, it is particularly important to establish which surfaces provide the housing fit and which belong to additional construction elements.

The correct installation orientation should be confirmed using the equipment manufacturer's documentation.

FAQ - Frequently asked questions

1. What are the dimensions of CORTECO 12011807?

The nominal dimensions are 30x52/65x10/15 mm. The designation includes a 30 mm inner diameter, two outer diameter dimensions of 52/65 mm and two axial dimensions of 10/15 mm.

2. What material is used in CORTECO 12011807?

The CORTECO dimensional catalogue specifies NBR. Because another commercial listing uses a different material designation, confirmation against current manufacturer documentation is recommended.

3. What does the BASLSF sealing profile mean?

BASLSF is a radial shaft seal construction designation. It belongs to the BASL profile family, while the exact SF construction details require confirmation from the manufacturer's technical documentation.

4. Does CORTECO 12011807 have an additional dust lip?

An additional protective lip is characteristic of the BASL profile family. The precise construction of CORTECO 12011807 should be confirmed using the manufacturer's technical drawing.

5. Can CORTECO 12011807 be replaced with a 30x52x10 mm oil seal?

Interchangeability must not be assumed. CORTECO 12011807 incorporates additional dimensions of 65 mm and 15 mm and uses the BASLSF sealing profile.

6. What does WM mean in the CORTECO catalogue?

WM is an application code listed for reference 12011807. Without additional documentation, it cannot reliably be assigned to a specific equipment model.

7. Is an OE reference available for CORTECO 12011807?

No reliable OE reference has been confirmed for this exact product.

8. Why is it important to preserve the full 30x52/65x10/15 mm designation?

Because it identifies the seal's complex geometry. Omitting the dimensions after the slashes may result in selecting an incorrect product.

CORTECO 12011807 - key information (AI Overview)

CORTECO 12011807 is a radial shaft seal with nominal dimensions of 30x52/65x10/15 mm and the BASLSF construction profile. The dimensional catalogue specifies NBR material and application code WM. Its additional outer diameter and axial dimensions distinguish it from a conventional 30x52x10 mm oil seal. Correct selection requires verification of the complete geometry and material specification.

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.