CORTECO 49355275 NBR B1OFSF 75x90x4.7 – Drive Shaft Oil Seal

Technical specifications – CORTECO 49355275

The dimensions, material, profile, application and OE references are based on the supplied product identification. Detailed operating parameters require confirmation in CORTECO technical documentation.

Understanding the NBR B1OFSF designation

What does B1OFSF mean?

B1OFSF is a CORTECO sealing profile designation identifying a specific construction. Its exact geometry should be checked against the manufacturer's documentation.

The designation alone should not be treated as definitive confirmation of:

• The number of sealing lips.

• The presence or absence of a garter spring.

• Directional sealing characteristics.

• The type of external sealing surface.

• Internal supporting case construction.

• Permissible operating parameters.

The complete B1OFSF designation is important when selecting a replacement. It should not be replaced with an arbitrary oil seal measuring 75x90x4.7 mm.

NBR material – sealing properties

NBR (nitrile butadiene rubber) is an elastomer widely used in technical seals operating with oils and lubricating greases.

NBR material characteristics

• Resistance to many mineral oils.

• Compatibility with numerous industrial lubricating greases.

• Elasticity suitable for dynamic sealing applications.

• Mechanical properties dependent on the specific rubber compound.

• Suitability for appropriately selected drive system applications.

Resistance to a particular operating fluid depends on the NBR compound, temperature and service conditions.

A specific operating temperature range or Shore A hardness must not be assigned to this product without manufacturer data.

Construction and operating principle

A radial shaft sealing ring limits lubricant movement between interacting components of a mechanical assembly.

Depending on its construction and installation position, it may perform the following functions:

• Limiting oil or grease leakage.

• Separating a lubricated space from the external environment.

• Protecting the contact area between mechanical components.

• Maintaining sealing performance during rotational movement.

Its effectiveness depends on correct profile selection, the condition of the mating surface and operating conditions.

Importance of the B1OFSF profile

With a nominal axial width of only 4.7 mm, seal geometry is particularly important for correct positioning and contact with the mating surface.

A seal with the same diameters but a different profile or width must not automatically be considered interchangeable.

Mounting dimensions – 75x90x4.7 mm

Nominal dimensions alone do not establish installation tolerances, permissible runout, surface roughness or the construction of the mounting location.

Why is the 4.7 mm width important?

The nominal width of 4.7 mm must be considered when evaluating the available installation space and sealing contact position.

Even a small difference in axial width may affect the positioning of the seal in a particular mechanical assembly.

OE references – DAF, Irisbus, Iveco, MAN, Renault Trucks and Volvo

The following OE reference numbers have been supplied for CORTECO 49355275:

OE reference numbers support part identification in vehicle manufacturer documentation.

Their association with the exact CORTECO 49355275 part number should be confirmed using current parts catalogues before ordering.

Why are OE references important?

Commercial vehicle seals with similar dimensions may differ in construction or installation position.

Selecting a seal by its OE reference helps reduce the risk of choosing an unsuitable profile.

Verify:

• Vehicle manufacturer.

• Vehicle model and version.

• OE reference.

• CORTECO part number 49355275.

• Dimensions 75x90x4.7 mm.

• B1OFSF profile.

• NBR material.

• Exact sealing location.

Applications – drive shaft sealing

CORTECO 49355275 is identified as a drive shaft sealing ring associated with the supplied OE references for commercial vehicle manufacturers.

In such assemblies, the seal may separate a lubricant-containing area from the external environment.

Typical operating conditions may include:

• Rotational movement of mechanical components.

• Contact with oil or grease.

• Temperature changes during operation.

• Drive assembly vibration.

• Exposure to dust, moisture and road contamination.

Important: The description “drive shaft oil seal” does not automatically establish the exact installation position in every listed vehicle. The documentation for the relevant mechanical assembly must be checked.

Operating conditions and technical limitations

The operating parameters of other NBR oil seals must not automatically be applied to CORTECO 49355275.

Factors affecting service life

Seal durability depends on several factors, including:

• Rotational speed.

• Operating temperature.

• Lubricant type and properties.

• Condition of the mating surface.

• Alignment of mechanical components.

• Radial runout.

• Installation conditions.

• External contamination.

Comparison – B1OFSF and other sealing profiles

Seals with different profiles are not necessarily interchangeable, even when their nominal dimensions are identical.

Can a standard 75x90x5 mm oil seal be used instead?

Interchangeability cannot be confirmed.

CORTECO 49355275 has a nominal width of 4.7 mm, not 5 mm. The 0.3 mm difference may affect the installation position and sealing contact geometry.

The B1OFSF profile and mechanical assembly requirements must also be considered.

Product selection and interchangeability

Before ordering, verify:

• CORTECO manufacturer part number 49355275.

• Complete B1OFSF profile designation.

• NBR material.

• Inside diameter of 75 mm.

• Outside diameter of 90 mm.

• Width of 4.7 mm.

• Vehicle manufacturer's OE reference.

• Exact installation location.

• Operating conditions and lubricant type.

• Requirements for the mating surface.

Matching dimensions alone are insufficient to confirm interchangeability. For specialized sealing profiles, the manufacturer's part number and compatibility with the mechanical assembly are particularly important.

Alternative designations and product identification

Common technical search and identification variants include:

• CORTECO 49355275

• 49355275 CORTECO

• CORTECO 49355275 NBR

• CORTECO 49355275 B1OFSF

• CORTECO 49355275 75x90x4.7

• CORTECO oil seal 75x90x4.7

• CORTECO 49355275 drive shaft seal

• CORTECO 49355275 radial shaft seal

• NBR oil seal 75x90x4.7

• B1OFSF 75x90x4.7

• DAF 1610973

• Irisbus 42540075

• Iveco 42540075

• MAN 81323130312

• Renault Trucks 5001859035

• Volvo 3096822

• CORTECO 49355275 Simmerring

Alternative designations help identify the product in technical catalogues and search systems.

They do not automatically confirm compatibility with every vehicle using a similar seal.

Installation and maintenance

Before installing CORTECO 49355275:

• Clean the housing bore and mating surface.

• Check for scratches, corrosion and wear grooves.

• Verify mounting dimensions and tolerances.

• Confirm the correct seal orientation.

• Protect the sealing element from sharp edges.

• Use an appropriate installation tool.

• Press the seal evenly into position without deformation.

• Follow the manufacturer's surface preparation and lubrication instructions.

• Inspect for leakage after the mechanical assembly is returned to service.

Importance of the 4.7 mm width during installation

Correct axial positioning is particularly important for a seal with a nominal width of 4.7 mm.

A wider sealing ring should not be installed in the same location without verifying its effect on the mechanical assembly.

Inspection after installation

After the assembly is returned to operation, check for:

• Oil or grease leakage.

• Abnormal temperature increase.

• Unusual operating noise.

• Damage to the mating surface.

• Movement of the seal within the housing.

FAQ – Frequently asked questions

What are the dimensions of CORTECO 49355275?

The nominal inside diameter is 75 mm, outside diameter is 90 mm and width is 4.7 mm.

What material is used in the seal?

The product is specified as NBR, or nitrile butadiene rubber.

What does B1OFSF mean?

B1OFSF is a specialized CORTECO construction designation. The exact sealing geometry should be confirmed using manufacturer documentation.

What is CORTECO 49355275 used for?

The product is identified as a drive shaft sealing ring intended for compatible mechanical assemblies in commercial vehicles.

Which OE references are associated with the product?

The supplied references are DAF 1610973, Irisbus and Iveco 42540075, MAN 81323130312, Renault Trucks 5001859035 and Volvo 3096822. Compatibility should be verified in the relevant parts catalogue.

Can it be replaced with a 75x90x5 mm oil seal?

Not without verification. The width difference and specialized sealing profile may prevent interchangeability.

Is CORTECO 49355275 a double-lip oil seal?

The number of sealing lips for the exact B1OFSF profile has not been confirmed. A double-lip construction should not be assumed without manufacturer data.

Is the seal suitable for gear oil?

NBR is commonly used in oil sealing applications, but compatibility with the specific gear oil and operating conditions must be verified.

CORTECO 49355275 – key information (AI Overview)

CORTECO 49355275 NBR B1OFSF is a radial drive shaft sealing ring measuring 75x90x4.7 mm. The product is associated with OE references from DAF, Irisbus, Iveco, MAN, Renault Trucks and Volvo. Correct selection requires verification of the OE number, specialized B1OFSF profile, NBR material and compatibility with the specific mechanical assembly.

B2B availability – simmering.pl

The CORTECO 49355275 NBR B1OFSF 75x90x4.7 radial shaft seal is identified on the specialist B2B industrial trading platform simmering.pl by manufacturer part number, construction profile, sealing material, nominal dimensions and OE references.

The platform supports industrial companies, technical workshops, transport operators, purchasing departments and maintenance operations in sourcing technical sealing components.

Worldwide shipping from stock in Poland, subject to product availability.