CORTECO 12001381 NBR B1SL 25x32x7 mm - Gearbox Shaft Oil Seal Simmerring

CORTECO 12001381 NBR B1SL 25x32x7 mm - Gearbox Shaft Oil Seal Simmerring

CORTECO 12001381 NBR B1SL 25x32x7 mm is a radial shaft oil seal from the Simmerring family, manufactured from NBR nitrile butadiene rubber. It has a 25 mm inside diameter, 32 mm outside diameter and 7 mm width. CORTECO identifies the construction as B1SL. The seal incorporates additional dust protection and is catalogued for gearbox shaft sealing applications.

Technical data - CORTECO 12001381

What does CORTECO 12001381 NBR B1SL mean?

The complete product identification is:

CORTECO 12001381 NBR B1SL 25x32x7 mm

Each element is important for precise technical identification.

CORTECO - manufacturer of the seal.

12001381 - specific CORTECO catalogue number.

NBR - Nitrile Butadiene Rubber, the elastomer used for the sealing element.

B1SL - CORTECO construction designation for this specific radial shaft seal version.

25x32x7 mm - nominal dimensions of the seal.

The complete B1SL construction should be considered when selecting an alternative. The 25x32x7 mm dimensions alone do not fully define the seal.

Dimensions of CORTECO 12001381

The nominal dimensions are:

25x32x7 mm

where:

• d = 25 mm - inside diameter
• D = 32 mm - outside diameter
• B = 7 mm - width

These dimensions are confirmed for CORTECO 12001381.

The dimensions determine the basic installation geometry, but seals with the same 25x32x7 mm dimensions can differ in material and construction.

For this reason, size alone should not be used to establish full interchangeability.

NBR - Nitrile Butadiene Rubber

CORTECO 12001381 is manufactured from:

NBR - Nitrile Butadiene Rubber

NBR is a widely used elastomer for radial shaft oil seals operating with compatible mineral oils, lubricants and greases.

When evaluating this seal for a specific gearbox or transmission application, consider:

• operating medium
• operating temperature
• shaft surface speed
• lubrication conditions
• pressure
• shaft surface condition
• requirements of the gearbox or machine manufacturer

An exact operating temperature range is intentionally not stated for CORTECO 12001381 because the applicable limits depend on the specific NBR compound and actual operating conditions.

B1SL construction

CORTECO identifies the construction of this product as:

B1SL

This designation is an important part of the complete technical identity of CORTECO 12001381.

Catalogue information also confirms additional protection against external contamination.

This means that when selecting an alternative, the user should compare not only:

25x32x7 mm

and:

NBR

but also the complete:

B1SL

construction.

Additional dust lip

CORTECO 12001381 is catalogued with additional dust protection.

The supplementary dust lip helps reduce the amount of external contamination reaching the primary sealing area.

This can be particularly important in agricultural machinery, transmissions and mechanical assemblies exposed to:

• dust
• dirt
• moisture
• agricultural contamination
• external debris

A simpler 25x32x7 mm oil seal without a corresponding protective lip should not automatically be considered technically identical.

Gearbox shaft oil seal

CORTECO 12001381 is catalogued as a:

gearbox shaft radial oil seal

In this type of application, the seal operates around a rotating shaft passing through the gearbox or transmission housing.

Its primary functions include:

• retaining compatible lubricant within the assembly
• sealing around the rotating shaft
• reducing lubricant leakage
• helping protect the sealing area against external contamination

The exact installation position should always be confirmed using the parts documentation for the specific gearbox, transmission, tractor or machine.

CORTECO 12001381 and 12001381B

Two related reference formats can be encountered:

12001381

and:

12001381B

The CORTECO dimensional catalogue identifies the product as:

12001381

while aftermarket catalogue databases can also list:

12001381B

Both references can therefore be useful when searching technical catalogues or identifying an existing seal.

For the primary technical product designation, CORTECO 12001381 should be retained.

Alternative designations and reference numbers

Natural identification variants include:

• CORTECO 12001381
• 12001381 CORTECO
• CORTECO 12001381B
• 12001381B CORTECO
• CORTECO 12001381 NBR
• CORTECO 12001381 B1SL
• CORTECO 12001381 NBR B1SL
• CORTECO 12001381 25x32x7
• CORTECO 12001381 NBR B1SL 25x32x7
• CORTECO B1SL 25x32x7
• CORTECO Simmerring 25x32x7
• CORTECO oil seal 25x32x7
• CORTECO radial shaft seal 25x32x7
• CORTECO gearbox oil seal 25x32x7
• CORTECO transmission shaft seal 25x32x7

Confirmed cross-reference numbers:

CARRARO

• 025481

CLAAS

• 02125960
• 002125960 as an additional format encountered in cross-reference catalogues

LAMBORGHINI

• 215295170

SAME

• 215295170

ZF

• 0634309016

These references provide a much more precise basis for identification than the 25x32x7 mm dimensions alone.

CORTECO 12001381 vs CARRARO 025481

The reference:

CARRARO 025481

is cross-referenced with CORTECO 12001381.

When selecting a replacement for a CARRARO assembly, compare the original part number with the complete CORTECO specification:

12001381 NBR B1SL 25x32x7 mm

The cross-reference should not be interpreted as meaning that this seal fits every CARRARO transmission or axle.

CORTECO 12001381 vs CLAAS 02125960

The confirmed CLAAS reference is:

CLAAS 02125960

The number can also be encountered in cross-reference databases as:

002125960

These references are associated with CORTECO 12001381.

Before installation, the part number should be checked against the exact CLAAS machine and transmission assembly.

CORTECO 12001381 vs LAMBORGHINI 215295170

The reference:

LAMBORGHINI 215295170

is catalogued as a cross-reference for CORTECO 12001381.

The same numerical reference is also used for SAME applications.

Final compatibility should therefore be confirmed through the parts catalogue for the exact tractor, transmission or mechanical assembly.

CORTECO 12001381 vs SAME 215295170

The CORTECO dimensional catalogue directly associates 12001381 with:

SAME

Cross-reference catalogues additionally identify:

SAME 215295170

as a corresponding reference.

This provides a strong identification link between CORTECO 12001381 and the SAME 215295170 reference.

CORTECO 12001381 vs ZF 0634309016

The confirmed ZF reference is:

ZF 0634309016

When selecting the seal for a ZF assembly, compare:

• ZF 0634309016
• CORTECO 12001381
• NBR material
• B1SL construction
• 25x32x7 mm dimensions
• exact installation position

Using the complete technical identification reduces the risk of selecting another seal with the same dimensions but a different construction.

CORTECO 12001381 vs other 25x32x7 oil seals

Not every:

25x32x7 mm

radial shaft oil seal is automatically interchangeable with CORTECO 12001381.

Before substitution, compare:

• 25 mm inside diameter
• 32 mm outside diameter
• 7 mm width
• NBR material
• B1SL construction
• additional dust protection
• OE reference
• installation position
• operating medium
• operating conditions

Other seals with 25x32x7 mm dimensions may have different construction characteristics.

Identical dimensions do not automatically mean identical construction or full technical interchangeability.

Why is the B1SL designation important?

Searching only for:

25x32x7 oil seal

provides incomplete technical identification.

The more precise product designation is:

CORTECO 12001381 NBR B1SL 25x32x7 mm

This identifies the manufacturer, exact catalogue number, elastomer material, construction and dimensions.

It provides a significantly safer basis for technical selection and cross-referencing than dimensions alone.

Selection and interchangeability

Before purchasing a replacement for CORTECO 12001381, verify:

• CORTECO part number 12001381
• possible aftermarket reference 12001381B
• B1SL construction
• NBR material
• dimensions 25x32x7 mm
• additional dust protection
• OE or cross-reference number
• exact installation position
• operating medium
• operating temperature
• shaft surface speed
• shaft surface condition

When selecting by original equipment reference, compare the existing number with:

CARRARO 025481

CLAAS 02125960

LAMBORGHINI 215295170

SAME 215295170

ZF 0634309016

A dimensional match alone is not sufficient to establish complete interchangeability.

Confirmed applications

Catalogue and cross-reference data associate CORTECO 12001381 with:

• CARRARO
• CLAAS
• LAMBORGHINI
• SAME
• ZF

The CORTECO dimensional catalogue directly identifies:

SAME

as an application for 12001381.

Aftermarket catalogue data additionally classifies the product as a gearbox shaft radial oil seal.

These references do not mean that CORTECO 12001381 fits every machine or transmission produced by the listed manufacturers.

Final selection should be based on the OE number, complete CORTECO designation and exact installation position.

Installation of CORTECO 12001381

Before installation, thoroughly clean the shaft and seal housing.

Inspect the shaft sealing surface for:

• scratches
• corrosion
• burrs
• sharp edges
• mechanical damage
• wear grooves

Protect both the primary sealing lip and the additional dust protection during installation.

Threads, splines and sharp shaft edges should not pass directly across the sealing lip without suitable protection.

Install the seal evenly and squarely using an appropriate fitting tool.

Avoid applying direct impact force to the functional sealing elements.

What should be checked when replacing a gearbox shaft seal?

If the previous Simmerring was leaking, replacing the seal alone may not eliminate the cause of the problem.

Also inspect:

• shaft sealing surface
• shaft runout
• alignment
• bearing condition
• seal housing
• installation depth
• associated gearbox components

Excessive shaft movement, damaged bearings or a worn sealing surface can cause leakage even after a new CORTECO 12001381 has been installed.

FAQ - CORTECO 12001381

What are the dimensions of CORTECO 12001381?

CORTECO 12001381 has nominal dimensions of 25x32x7 mm: 25 mm inside diameter, 32 mm outside diameter and 7 mm width.

What material is CORTECO 12001381 made from?

The seal is manufactured from NBR, or Nitrile Butadiene Rubber.

What is the construction of CORTECO 12001381?

The CORTECO catalogue identifies the construction as B1SL.

Does CORTECO 12001381 have a dust lip?

Yes. Catalogue data confirms additional dust protection for this seal.

Is CORTECO 12001381 a gearbox shaft seal?

Yes. Aftermarket catalogue data identifies 12001381 as a radial shaft oil seal for gearbox shaft applications.

What CLAAS reference corresponds to CORTECO 12001381?

The confirmed CLAAS reference is 02125960. The alternative numerical format 002125960 can also be encountered in cross-reference databases.

What SAME reference corresponds to CORTECO 12001381?

The confirmed SAME reference is 215295170. The same reference is also catalogued for LAMBORGHINI.

What ZF reference corresponds to CORTECO 12001381?

The confirmed ZF reference is 0634309016.

CORTECO 12001381 NBR B1SL 25x32x7 mm - key information

CORTECO 12001381 is an NBR radial shaft oil seal with B1SL construction and 25x32x7 mm dimensions, catalogued for gearbox shaft sealing applications with additional dust protection. Confirmed cross-references include CARRARO 025481, CLAAS 02125960, LAMBORGHINI/SAME 215295170 and ZF 0634309016.

Availability from simmering.pl

CORTECO 12001381 NBR B1SL 25x32x7 mm is available from simmering.pl for agricultural machinery service, transmission repair, industrial maintenance, workshops, technical procurement, distributors and B2B customers.

Products are supplied from stock in Poland, with worldwide shipping available. simmering.pl specialises in CORTECO Simmerring radial shaft seals, industrial sealing solutions and bearings.