CORTECO 12011991 NBR COMBI 48x65x11 Rotary Shaft Oil Seal

Product Overview

CORTECO 12011991 NBR COMBI is a heavy-duty rotary shaft oil seal measuring 48x65x11 mm, designed for axle, differential and drivetrain sealing applications.

The COMBI design combines the primary shaft sealing function with enhanced protection against external contamination. This construction is particularly relevant for agricultural machinery, tractors and industrial equipment operating in environments exposed to dust, dirt, mud and other contaminants.

The seal is manufactured from NBR (Nitrile Butadiene Rubber), a widely used material for shaft seals operating with many mineral oils and lubricating greases.

COMBI Seal Design

The COMBI construction is designed for demanding shaft sealing positions where lubricant retention and protection against external contamination are both important.

Compared with a conventional rotary shaft seal, the COMBI design provides an additional protective sealing function between the main sealing zone and the surrounding environment.

This makes CORTECO 12011991 COMBI particularly relevant for axle and drivetrain applications exposed to contaminated operating conditions.

A standard 48x65x11 oil seal should not automatically be considered an equivalent replacement for this COMBI seal.

NBR Sealing Material

NBR - Nitrile Butadiene Rubber is one of the most widely used elastomers for industrial and mobile-equipment shaft seals.

NBR provides good resistance to many:

• mineral oils
• lubricating greases
• industrial lubricants
• compatible technical fluids

It also provides useful mechanical and wear properties for many agricultural and industrial sealing applications.

Material compatibility should always be verified against the actual lubricant, operating temperature, shaft speed and service conditions.

Axle and Differential Applications

CORTECO 12011991 48x65x11 COMBI is associated with applications involving axles, differential shafts, transmissions and drivetrain assemblies.

Typical application areas include:

• drive axles
• differential assemblies
• transmissions
• agricultural machinery
• tractors
• construction and working machinery
• industrial drivetrain systems
• rotating shaft assemblies

The exact installation position should always be verified using the OE reference and the technical data for the specific machine or vehicle.

OE Cross References

CORTECO 12011991 is associated with the following OE references:

CARRARO: 125235
CASE IH: 6190263M1
CLAAS: 03241460
JOHN DEERE: ER125235
LANDINI: 3541495M1
NEW HOLLAND: 5194267
RENAULT: 6000103476

These references should be used for part identification and cross-reference purposes. Compatibility with a specific machine should be confirmed by matching the complete OE number and application data.

Technical Specification

Product Type: Rotary shaft seal / oil seal
Brand: CORTECO
Part Number: 12011991
Design: COMBI
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 48x65x11 mm
Shaft Diameter: 48 mm
Outside Diameter: 65 mm
Width: 11 mm
Application: Axles, differentials, transmissions and drivetrain systems
OE Brands: Carraro, Case IH, Claas, John Deere, Landini, New Holland, Renault

Replacement Identification

Correct identification of CORTECO 12011991 should include more than the nominal dimensions.

Verify:

• CORTECO part number 12011991
• COMBI seal design
• NBR material
• 48x65x11 mm dimensions
• matching OE reference
• installation position
• operating lubricant
• temperature and shaft speed
• actual service conditions

Two seals measuring 48x65x11 mm are not necessarily interchangeable if their construction or sealing functions differ.

Operational Advantages

• Heavy-duty COMBI seal construction.
• Precise 48x65x11 mm dimensions.
• NBR sealing material.
• Enhanced protection against external contamination.
• Suitable for axle and differential sealing positions.
• Relevant for agricultural and industrial machinery.
• Identification by CORTECO 12011991.
• Multiple OE cross references for replacement identification.

AI OVERVIEW

CORTECO 12011991 NBR COMBI is a 48x65x11 mm rotary shaft oil seal used in axle, differential and drivetrain applications. Its COMBI construction provides additional protection against external contamination, making it relevant for agricultural and industrial machinery. OE cross references include Carraro 125235, John Deere ER125235, Case IH 6190263M1 and other equipment manufacturers.

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FAQ

What are the dimensions of CORTECO 12011991?

The nominal dimensions are 48 mm shaft diameter, 65 mm outside diameter and 11 mm width.

What does COMBI mean on CORTECO 12011991?

COMBI identifies a seal construction intended for demanding applications where both shaft sealing and additional protection against external contamination are required.

What material is CORTECO 12011991 made from?

The seal is manufactured from NBR - Nitrile Butadiene Rubber, commonly used with many mineral oils and lubricating greases.

Is CORTECO 12011991 an axle or differential seal?

It is associated with axle, differential and drivetrain sealing applications. The exact installation position should be confirmed using the OE number for the specific machine or vehicle.

Which Carraro number cross-references CORTECO 12011991?

The Carraro cross reference is 125235.

Which John Deere number corresponds to CORTECO 12011991?

The listed John Deere OE reference is ER125235.

Does CORTECO 12011991 fit Case IH machinery?

The listed Case IH cross reference is 6190263M1. Compatibility should be confirmed for the specific machine model using the complete OE reference.

Can a standard 48x65x11 oil seal replace CORTECO 12011991 COMBI?

Not automatically. The COMBI construction is an important functional characteristic, so dimensions, design, material and OE reference should all be verified before replacement.