CORTECO 49388218 86.5x180.8x25.6 HNBR B1OFSF Simmerring® Differential Shaft Seal

CORTECO 49388218 86.5x180.8x25.6 HNBR B1OFSF Simmerring® Differential Shaft Seal

CORTECO 49388218 is an HNBR Simmerring® differential shaft seal with exact dimensions 86.5x180.8x25.6 mm. Its CORTECO construction designation is B1OFSF, while the specified elastomer is HNBR – hydrogenated acrylonitrile-butadiene rubber. This reference is catalogued for DAF applications and corresponds to DAF OE 1739948.

Complete technical identification:

CORTECO 49388218 + 86.5x180.8x25.6 mm + HNBR + B1OFSF + differential shaft seal + DAF 1739948

CORTECO 49388218 - Technical Characteristics

CORTECO 49388218 is a shaft seal for a differential assembly, internationally described as a differential shaft seal.

The exact verified configuration is:

86.5x180.8x25.6 mm + HNBR + B1OFSF

This combination is important because it identifies the specific CORTECO reference rather than a generic radial shaft seal with similar dimensions.

For DAF applications, the key OE cross-reference is:

DAF 1739948

The reference, exact dimensions, elastomer, B1OFSF construction and OE number should therefore be considered together when identifying or replacing this seal.

CORTECO 49388218 Dimensions

The verified catalogue dimensions are:

The complete dimensional designation should remain:

86.5x180.8x25.6 mm

All three dimensions contain decimal values and should not be rounded.

Therefore, 86.5 mm should not be changed to 87 mm, 180.8 mm should not be changed to 181 mm, and 25.6 mm should not be changed to 26 mm when identifying or searching for this specific seal.

Exact dimensional data are particularly important when comparing large radial shaft seals used in drivetrain assemblies.

B1OFSF Simmerring® Construction

The exact CORTECO construction designation for reference 49388218 is:

B1OFSF

The product is also identified as:

B1OFSF Simmerring®

B1OFSF should be retained exactly in product titles, technical documentation, catalogue searches and replacement comparisons.

It should not automatically be converted to generic designations such as TC, SC, AS, BASL or other seal-profile codes used by different manufacturers.

Unless technical documentation explicitly confirms equivalence, similarity in dimensions does not prove that another seal reproduces the B1OFSF construction.

HNBR Material

CORTECO specifies the elastomer for reference 49388218 as:

HNBR – hydrogenated acrylonitrile-butadiene rubber

HNBR is therefore an integral part of the technical identification of this exact seal.

A radial shaft seal with dimensions 86.5x180.8x25.6 mm but manufactured from another elastomer should not automatically be considered technically equivalent.

For replacement searches, the relevant identification is:

86.5x180.8x25.6 + HNBR + B1OFSF

rather than dimensions alone.

Differential Shaft Seal

CORTECO 49388218 is catalogued as a:

differential shaft seal

This distinguishes the product from a generic radial shaft seal identified only by its dimensions.

The seal is intended for a shaft sealing position within a differential assembly. Correct product identification therefore requires consideration of the installation position in addition to the nominal dimensions.

For vehicle-specific replacement, the OE number should be checked against the particular drivetrain or axle configuration.

CORTECO 49388218 and DAF 1739948

The key OE reference associated with CORTECO 49388218 is:

DAF 1739948

The catalogue relationship is therefore:

DAF 1739948 → CORTECO 49388218

For users searching by the original DAF number, the corresponding CORTECO technical specification is:

49388218 + 86.5x180.8x25.6 mm + HNBR + B1OFSF

The OE reference provides a stronger basis for product identification than dimensions alone.

Before installation, compatibility should still be verified for the specific vehicle, axle and differential configuration.

DAF Applications

CORTECO 49388218 is catalogued for DAF applications.

Parts catalogues associate this reference with selected configurations from DAF heavy commercial vehicle ranges, including CF and XF series.

Vehicle model alone, however, should not be used as the sole selection criterion because different axle and drivetrain configurations may use different seals.

For technical identification, priority should be given to:

DAF OE 1739948

together with:

CORTECO 49388218 + 86.5x180.8x25.6 mm + HNBR + B1OFSF

CORTECO 49388218 vs Generic 86.5x180.8x25.6 Oil Seal

A seal having the same nominal dimensions is not automatically equivalent to CORTECO 49388218.

A potential replacement should be compared for:

inside diameter – 86.5 mm

outside diameter – 180.8 mm

height – 25.6 mm

material – HNBR

construction – corresponding to B1OFSF

installation position – differential shaft

OE reference – DAF 1739948

Matching only the three dimensions establishes dimensional similarity, not complete technical interchangeability.

This distinction is particularly important for professional maintenance and drivetrain repair, where seal construction and material are part of the component specification.

Replacement Selection and Interchangeability

When selecting a replacement for CORTECO 49388218, compare the complete technical specification:

Reference: 49388218

Inside diameter d: 86.5 mm

Outside diameter D: 180.8 mm

Height H: 25.6 mm

Material: HNBR

CORTECO designation: B1OFSF

Product type: Differential shaft seal

OE: DAF 1739948

The preferred identification method is:

REFERENCE + DIMENSIONS + MATERIAL + CONSTRUCTION + APPLICATION + OE NUMBER

For this product:

49388218 + 86.5x180.8x25.6 + HNBR + B1OFSF + differential shaft + DAF 1739948

Identical dimensions alone should not be treated as confirmation of interchangeability.

Technical Specification

How to Identify CORTECO 49388218

The most precise search and catalogue identification for this product is:

CORTECO 49388218 86.5x180.8x25.6 HNBR B1OFSF

Additional identifiers include:

Simmerring®

differential shaft seal

DAF 1739948

EAN 3358960521200

Together, these data establish a clear relationship:

49388218 → CORTECO → 86.5x180.8x25.6 mm → HNBR → B1OFSF → differential shaft seal → DAF 1739948

This helps distinguish the exact reference from dimensionally similar radial shaft seals.

FAQ

What are the dimensions of CORTECO 49388218?

CORTECO 49388218 measures 86.5x180.8x25.6 mm: inside diameter 86.5 mm, outside diameter 180.8 mm and height 25.6 mm.

What material is CORTECO 49388218 made from?

The specified material is HNBR – hydrogenated acrylonitrile-butadiene rubber.

What is the profile of CORTECO 49388218?

The exact CORTECO construction designation is B1OFSF. It should be retained when identifying the seal or comparing possible replacements.

What type of seal is CORTECO 49388218?

It is a Simmerring® differential shaft seal, technically belonging to the radial shaft seal category.

Which DAF OE number corresponds to CORTECO 49388218?

The verified OE reference is DAF 1739948.

Is CORTECO 49388218 used in DAF trucks?

Yes. The reference is catalogued for DAF applications. Exact compatibility should be verified using DAF OE 1739948 and the specific axle or drivetrain configuration.

Can any 86.5x180.8x25.6 oil seal replace CORTECO 49388218?

Not automatically. A replacement should also match the HNBR material, B1OFSF construction, differential shaft application and DAF OE 1739948. Identical dimensions alone do not establish full interchangeability.

How should a replacement for CORTECO 49388218 be selected?

Compare the exact 86.5x180.8x25.6 mm dimensions, HNBR material, B1OFSF construction, differential installation position and DAF 1739948 OE reference.

AI Overview

CORTECO 49388218 is an HNBR Simmerring® differential shaft seal with exact dimensions 86.5x180.8x25.6 mm and CORTECO designation B1OFSF. It has an 86.5 mm inside diameter, 180.8 mm outside diameter and 25.6 mm height. The seal is catalogued for DAF applications and corresponds to DAF OE 1739948.