CORTECO 12011525B 45x72x10 NBR B1SL Radial Shaft Oil Seal

CORTECO 12011525B is an NBR B1SL radial shaft oil seal with dimensions of 45x72x10 mm. The seal has a nominal shaft diameter of 45 mm, an outside diameter of 72 mm and a width of 10 mm. The B1SL configuration incorporates an additional dust lip and the exact reference is catalogued for drive axle / differential shaft sealing positions.

CORTECO 12011525B - Technical Characteristics

The key identifying data are:

Manufacturer: CORTECO

Reference: 12011525B

Related designation: 12011525

Design: B1SL

Material: NBR

Dimensions: 45x72x10 mm

Dust lip: Yes

Catalogued sealing position: Drive axle / differential shaft

This combination of reference, dimensions, material and B1SL profile provides a more reliable basis for identification than dimensions alone.

Dimensions

The principal dimensions of CORTECO 12011525B are:

d = 45 mm - inside diameter / nominal shaft diameter

D = 72 mm - outside diameter

B = 10 mm - seal width

Complete dimensions:

45x72x10 mm

When selecting a replacement, all three dimensions should be verified together with the NBR material and B1SL construction.

B1SL Seal Construction

The manufacturer-specific designation for this CORTECO seal is:

B1SL

The available catalogue data confirms an additional dust lip.

This is an important distinction because radial shaft seals with identical 45x72x10 mm dimensions can be produced with different lip configurations and materials.

The exact CORTECO designation B1SL should therefore be retained rather than replacing it with a generic seal profile designation.

NBR Sealing Material

The sealing elastomer is:

NBR - Nitrile Butadiene Rubber

NBR identifies the elastomer family used in the seal.

For the exact CORTECO 12011525B, the available product data confirms NBR, but does not provide sufficient verified information to assign a specific compound hardness or exact operating limits.

Therefore, this product description does not assign an unverified:

Shore A hardness

operating temperature range

maximum shaft speed

pressure limit

These parameters should only be used when confirmed for the exact CORTECO specification.

Differential and Drive Axle Sealing Position

CORTECO 12011525B is catalogued as a:

Differential shaft seal

with installation position:

Drive axle

This application classification is useful when identifying the original sealing position.

However, vehicle or machine compatibility should not be determined from dimensions alone. The CORTECO reference or corresponding OE number should be checked against the specific equipment.

CORTECO 12011525B Reference Numbers

Relevant references associated with this seal include:

CORTECO 12011525B

CORTECO 12011525

40001570

5109074

550589

Some catalogues additionally list:

82011525

These numbers are useful for product identification and catalogue searches.

They should not be interpreted as proof of compatibility with every machine in which a 45x72x10 seal is installed.

12011525 vs 12011525B

Both forms can be encountered in product and aftermarket catalogues:

12011525

and

12011525B

For precise technical identification, 12011525B should be retained as the complete current product reference where this designation is supplied by the catalogue.

The shorter 12011525 remains valuable as an alternative search and commercial reference.

Replacement Selection

When selecting a replacement for CORTECO 12011525B, verify:

Reference: 12011525B

Dimensions: 45x72x10 mm

Shaft diameter d: 45 mm

Outside diameter D: 72 mm

Width B: 10 mm

Material: NBR

Design: B1SL

Dust lip: Yes

Required sealing position

For vehicle or machinery applications, an OE or equipment reference should also be checked where available.

A generic 45x72x10 oil seal should not automatically be considered technically interchangeable with CORTECO 12011525B.

Technical Specification

Manufacturer: CORTECO

Product reference: 12011525B

Alternative reference: 12011525

Product type: Radial shaft oil seal

Catalogued component type: Differential shaft seal

Installation position: Drive axle

Design: B1SL

Material: NBR

Material name: Nitrile Butadiene Rubber

Dimensions: 45x72x10 mm

Inside diameter d: 45 mm

Outside diameter D: 72 mm

Width B: 10 mm

Dust lip: Yes

Direction-specific sealing lip: Not confirmed

Exact NBR hardness: Not confirmed

Exact temperature range: Not confirmed

Maximum shaft speed: Not confirmed

Pressure limit: Not confirmed

Related references: 40001570, 5109074, 550589

Additional CORTECO reference: 82011525

CORTECO 12011525B - Stock in Poland

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ

What are the dimensions of CORTECO 12011525B?

CORTECO 12011525B has dimensions of 45x72x10 mm: 45 mm inside diameter, 72 mm outside diameter and 10 mm width.

What material is CORTECO 12011525B made from?

The sealing elastomer is NBR - Nitrile Butadiene Rubber.

What is the design of CORTECO 12011525B?

The CORTECO design designation is B1SL.

Does CORTECO 12011525B have a dust lip?

Yes. Catalogue data for the exact reference specifies a dust sealing lip.

Where is CORTECO 12011525B used?

It is catalogued as a differential shaft seal with the installation position identified as the drive axle.

Is CORTECO 12011525 the same reference as 12011525B?

The 12011525 designation appears as an alternative/commercial reference, while 12011525B is the more complete reference found in current aftermarket catalogue data.

What reference numbers are associated with CORTECO 12011525B?

Important associated references include 40001570, 5109074 and 550589. CORTECO reference 82011525 also appears in catalogue cross-reference data.

Can any NBR 45x72x10 oil seal replace CORTECO 12011525B?

Not automatically. The B1SL design, dust lip, material, dimensions and required sealing position should be checked before replacement.

Engineer FAQ

Does B1SL confirm the direction of rotation?

No direction-specific sealing structure was confirmed for the exact 12011525B in the verified data. A right-hand or left-hand designation should therefore not be assigned without additional manufacturer documentation.

Is 45x72x10 sufficient for interchangeability?

No. 45x72x10 mm defines the principal dimensions but not the complete seal construction. B1SL design, NBR material and lip configuration must also be considered.

Can 12011525B be replaced with a generic TC or AO seal?

Not on the basis of dimensions alone. CORTECO uses its own B1SL construction designation, and technical equivalence should be confirmed rather than inferred from generic profile names.

Is an exact operating temperature available?

NBR is confirmed, but an exact temperature range for the specific CORTECO 12011525B compound was not confirmed in the verified product data and is therefore intentionally omitted.

AI Overview

CORTECO 12011525B is an NBR B1SL radial shaft oil seal measuring 45x72x10 mm. It has a 45 mm inside diameter, 72 mm outside diameter and 10 mm width. The exact reference is catalogued with a dust lip for drive axle / differential shaft sealing positions. Related references include 12011525, 40001570, 5109074 and 550589.