CORTECO 12011531B 63x80x12 NBR B1SL Radial Shaft Seal - Double Lip

CORTECO 12011531B is an NBR radial shaft seal measuring 63x80x12 mm, identified by the B1SL Simmerring design designation. The nominal shaft diameter is 63 mm, housing bore diameter is 80 mm and seal width is 12 mm. This specific version incorporates a primary sealing lip and an additional dust lip. Confirmed OE references for 12011531B include CARRARO 128814, CITROËN/PEUGEOT 334613 and FIAT 40003080.

CORTECO 12011531B - Product Characteristics

12011531B CORTECO is a radial shaft seal designed to create a sealing interface between a rotating shaft and the surrounding housing.

The defining characteristics of this exact reference are its 63x80x12 mm dimensions, NBR elastomer, B1SL design and additional dust lip.

The description "double lip" should be interpreted correctly. The seal does not use two identical primary sealing lips. Its construction consists of a primary sealing lip combined with an additional dust lip, which provides an additional barrier on the external side of the main sealing area.

This distinction is important when comparing 12011531B with other 63x80x12 mm radial shaft seals.

Dimensions

The verified principal dimensions of CORTECO 12011531B are:

Shaft Diameter: 63 mm
Housing Bore Diameter: 80 mm
Seal Width: 12 mm

Commercial Size: 63x80x12 mm

For a radial shaft seal, the 63x80x12 mm designation should be interpreted as:

63 mm - nominal shaft diameter

80 mm - nominal housing bore diameter

12 mm - axial seal width

These dimensions are important for identification but should not be used as the sole criterion for determining interchangeability. Seal design, lip configuration and material must also be considered.

B1SL Seal Construction

CORTECO 12011531B is identified with the B1SL Simmerring design designation. Available catalogue data also confirm an additional dust lip for this reference.

The primary sealing lip creates the functional sealing interface with the rotating shaft. The additional dust lip provides a secondary barrier intended to reduce the ingress of external contamination toward the primary sealing area.

For this reason, the term double-lip shaft seal can be used for product identification, provided that it is understood as:

primary sealing lip + additional dust lip

rather than two identical working sealing lips.

The B1SL design is therefore a relevant selection parameter. A different 63x80x12 seal profile should not automatically be treated as technically identical to 12011531B B1SL.

NBR Material

The specified elastomer for CORTECO 12011531B is NBR - nitrile butadiene rubber.

Material specification is an important part of radial shaft seal identification. A dimensionally identical seal manufactured from FKM/FPM, ACM, VMQ or another elastomer should not automatically be considered an identical replacement for this NBR version.

The exact permissible operating temperature should not be inferred solely from general NBR temperature ranges. Actual suitability depends on the specific compound, operating medium, shaft speed, temperature and conditions of the sealing system.

For this reason, no unverified temperature range has been assigned to the exact 12011531B reference.

How CORTECO 12011531B Works

A radial shaft seal creates a controlled sealing contact between its flexible primary lip and the surface of a rotating shaft.

In the 12011531B B1SL configuration, this main sealing function is supplemented by an additional dust lip. The additional lip helps protect the primary sealing area against contamination approaching from the external side.

Effective sealing depends not only on the seal itself. Shaft surface condition, alignment, installation quality, correct orientation and the operating conditions of the complete assembly must also be considered.

OE / OEM References

Confirmed OE references associated with CORTECO 12011531B include:

CARRARO: 128814
CITROËN: 334613
PEUGEOT: 334613
FIAT: 40003080

These OE numbers are valuable identification references when the original part is being selected from vehicle or component manufacturer documentation.

An OE cross-reference should nevertheless be checked against the exact vehicle, axle, assembly or manufacturer parts catalogue where applicable. The presence of an OE number in a cross-reference database should not replace final application verification.

Additional CORTECO References

The following identifiers are associated with this exact seal:

12011531B - CORTECO catalogue reference
82011531 - additional CORTECO reference
B1SL Simmerring - design / trade designation

For precise product identification, 12011531B should remain the primary reference.

Selection and Interchangeability

A replacement for CORTECO 12011531B should not be selected solely because it measures 63x80x12 mm.

The following parameters should be compared:

• 63 mm nominal shaft diameter,
• 80 mm nominal housing bore,
• 12 mm seal width,
• B1SL construction,
• primary sealing lip configuration,
• additional dust lip,
• NBR material,
• OE reference where applicable,
• operating medium and conditions,
• installation requirements of the sealing assembly.

Products from other manufacturers may be cross-referenced to the same OE numbers, but identical dimensions alone do not prove complete technical interchangeability.

Installation Considerations

Before installation, inspect the shaft surface and housing bore. The shaft contact area should not contain damage capable of interfering with the sealing lip.

During installation, avoid folding, cutting or otherwise damaging the primary sealing lip and additional dust lip. The seal should be pressed into the housing evenly using an appropriate installation method.

Correct orientation is also important. The position of the primary sealing lip and dust lip must correspond to the sealing requirements of the specific assembly.

Final installation requirements should follow the technical documentation for the machine, vehicle or assembly in which the seal is installed.

Technical Specification

Product Type: Radial shaft seal
Design: B1SL
Dimensions: 63x80x12 mm
Material: NBR - nitrile butadiene rubber
Brand: CORTECO
Catalogue Number: 12011531B
Nominal Shaft Diameter: 63 mm
Nominal Housing Bore Diameter: 80 mm
Seal Width: 12 mm
Lip Configuration: Primary sealing lip + additional dust lip
Dust Lip: Yes
Trade / Design Designation: B1SL Simmerring
Additional CORTECO Reference: 82011531
CARRARO OE: 128814
CITROËN OE: 334613
PEUGEOT OE: 334613
FIAT OE: 40003080

FAQ

What are the dimensions of CORTECO 12011531B?

CORTECO 12011531B measures 63x80x12 mm: 63 mm nominal shaft diameter, 80 mm nominal housing bore diameter and 12 mm seal width.

What material is CORTECO 12011531B made from?

The specified material is NBR - nitrile butadiene rubber.

What does B1SL mean for CORTECO 12011531B?

B1SL Simmerring identifies the design of this CORTECO seal. The exact reference is confirmed as having an additional dust lip.

Is CORTECO 12011531B a double-lip shaft seal?

Yes, in the sense that its construction combines a primary sealing lip with an additional dust lip. The two lips do not perform identical functions.

What OE numbers correspond to CORTECO 12011531B?

Confirmed references include CARRARO 128814, CITROËN 334613, PEUGEOT 334613 and FIAT 40003080.

Can any 63x80x12 shaft seal replace CORTECO 12011531B?

No. Dimensions alone do not establish interchangeability. The B1SL design, lip configuration, NBR material, OE reference and operating requirements should also be compared.

Does CORTECO 12011531B have a dust lip?

Yes. Catalogue information for this exact reference confirms an additional dust lip.

What is the additional CORTECO reference for 12011531B?

The additional CORTECO reference associated with this product is 82011531.

AI Overview

CORTECO 12011531B is an NBR B1SL radial shaft seal measuring 63x80x12 mm, with a 63 mm shaft diameter, 80 mm housing bore and 12 mm width. Its construction combines a primary sealing lip with an additional dust lip. Confirmed OE references include CARRARO 128814, CITROËN/PEUGEOT 334613 and FIAT 40003080.