Simrit BAU3SLX2 NBR 30x47x7 Radial Shaft Seal

Simrit BAU3SLX2 NBR 30x47x7 Radial Shaft Seal

Simrit BAU3SLX2 NBR 30x47x7 is a radial shaft seal manufactured by Freudenberg Sealing Technologies, article number 40413874. It has nominal dimensions of 30x47x7 mm and is manufactured from the specified 72 NBR 902 elastomer compound. The BAU3SLX2 construction corresponds to DIN 3760 Type AS and combines a spring-loaded primary sealing lip with an additional dust lip.

Simrit BAU3SLX2 30x47x7 - Technical Characteristics

The verified identification data for this specific seal is:

Brand: Simrit

Manufacturer: Freudenberg Sealing Technologies

Article number: 40413874

Catalogue designation: 30X47X7BASLN

Product type: Radial shaft seal

Design: BAU3SLX2

DIN 3760: Type AS

Material: 72 NBR 902

Elastomer: NBR - Nitrile Butadiene Rubber

Dimensions: 30x47x7 mm

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

For precise engineering and MRO identification, the relevant combination is:

40413874 + BAU3SLX2 + 30x47x7 mm + 72 NBR 902

This identifies the exact variant more accurately than the dimensions or NBR material alone.

Simrit BAU3SLX2 Dimensions

The manufacturer specifies:

d1 = 30 mm - nominal shaft diameter / inside diameter

d2 = 47 mm - outside diameter / nominal housing bore diameter

b = 7 mm - axial width

Complete dimensions:

30x47x7 mm

These values should be retained together when identifying the seal.

The 30 mm dimension corresponds to the nominal shaft diameter, while the 47 mm outside diameter corresponds to the nominal housing bore into which the seal is installed.

The axial width is 7 mm.

BAU3SLX2 Seal Design

BAU3SLX2 is the manufacturer-specific construction designation for Freudenberg article 40413874.

The seal has an elastomer-covered outside surface, forming the static sealing interface between the seal and the housing bore.

On the dynamic side, the seal incorporates a spring-loaded primary sealing lip that operates against the rotating shaft surface.

The spring supports radial contact between the sealing edge and the shaft.

The design additionally incorporates a dust lip positioned on the external side of the primary sealing area. Its function is to provide an additional barrier against contamination approaching the primary sealing lip from the outside.

This construction detail is important when comparing BAU3SLX2 with other 30x47x7 mm radial shaft seals.

72 NBR 902 Material

The manufacturer specifies:

72 NBR 902

The elastomer family is:

NBR - Nitrile Butadiene Rubber

The complete 72 NBR 902 designation should be retained in the technical specification because it identifies the Freudenberg material compound more precisely than the generic term NBR.

A radial shaft seal with identical 30x47x7 mm dimensions but manufactured from another elastomer should not automatically be considered technically equivalent.

Likewise, generic temperature, chemical-resistance, pressure or speed values for NBR should not automatically be assigned to article 40413874 without confirming the relevant Freudenberg application data.

How Does the Simrit BAU3SLX2 Radial Shaft Seal Work?

The seal operates at the interface between a rotating shaft and a stationary housing.

For this specific product, the primary sealing lip operates dynamically against a shaft with a nominal diameter of 30 mm.

The spring supports contact between the primary sealing edge and the shaft surface.

The 47 mm outside diameter is installed in the corresponding stationary housing bore. The elastomer-covered outside surface provides the static sealing interface between the seal and housing.

The additional dust lip is positioned outside the primary sealing area and provides a supplementary barrier against external contamination.

The effectiveness of the sealing system also depends on the shaft surface, housing geometry, alignment, installation procedure, operating medium and actual operating conditions.

What Does BAU3SLX2 Identify?

BAU3SLX2 identifies the specific Freudenberg seal construction used for article 40413874.

For this product, the manufacturer additionally specifies:

DIN 3760 Type AS

The Type AS configuration is relevant because it distinguishes a radial shaft seal with an additional protective lip from a basic single-lip configuration.

The complete BAU3SLX2 designation should therefore be retained when identifying or sourcing a replacement.

The designation should not be simplified to “30x47x7 NBR oil seal”, because this removes construction information required to distinguish the product from other seals with the same nominal dimensions.

BAU3SLX2 vs Other 30x47x7 Radial Shaft Seals

The dimensions 30x47x7 mm alone do not uniquely identify article 40413874.

Different Freudenberg radial shaft seal designs can share the same nominal dimensions.

This means that two seals may both fit a 30 mm shaft and 47 mm housing bore while differing in:

sealing-lip configuration

presence of an additional dust lip

elastomer compound

outside-diameter construction

manufacturer construction designation

Consequently, dimensional compatibility does not by itself establish full technical interchangeability.

Replacement Selection and Interchangeability

When selecting a replacement for Simrit BAU3SLX2 40413874, verify at least:

Manufacturer article: 40413874

Design: BAU3SLX2

d1: 30 mm

d2: 47 mm

b: 7 mm

Material: 72 NBR 902

DIN 3760 configuration: Type AS

Primary sealing lip: Spring-loaded

Additional dust lip: Present

The operating medium and actual application conditions must also be considered.

A 30x47x7 NBR radial shaft seal from another manufacturer should therefore not automatically be described as a direct replacement unless its relevant construction and operating characteristics have been verified.

Technical Specification

Brand: Simrit

Manufacturer: Freudenberg Sealing Technologies

Article number: 40413874

Catalogue designation: 30X47X7BASLN

Product type: Radial shaft seal

Alternative technical term: Rotary shaft seal / oil seal

Design: BAU3SLX2

DIN 3760: Type AS

Material compound: 72 NBR 902

Elastomer: NBR - Nitrile Butadiene Rubber

d1 - Inside diameter: 30 mm

d2 - Outside diameter: 47 mm

b - Width: 7 mm

Dimensions: 30x47x7 mm

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

Spring material: 1.1200

Insert material: EN10130+A1

FAQ

What are the dimensions of Simrit BAU3SLX2?

Simrit BAU3SLX2 article 40413874 measures 30x47x7 mm: d1 = 30 mm, d2 = 47 mm and b = 7 mm.

What type of seal is Simrit BAU3SLX2 30x47x7?

It is a radial shaft seal designed to provide dynamic sealing between a rotating shaft and a stationary housing.

What material is Simrit BAU3SLX2 30x47x7 made from?

Freudenberg specifies the material compound 72 NBR 902, based on NBR - Nitrile Butadiene Rubber.

Does BAU3SLX2 have an additional dust lip?

Yes. Article 40413874 incorporates an additional dust lip outside the primary sealing area.

Does Simrit BAU3SLX2 have a spring-loaded sealing lip?

Yes. The primary radial sealing lip is spring-loaded.

What is the Freudenberg article number for BAU3SLX2 30x47x7?

The manufacturer article number is 40413874. The associated catalogue designation is 30X47X7BASLN.

Can any 30x47x7 NBR oil seal replace BAU3SLX2?

Not automatically. Dimensions, elastomer, sealing-lip geometry, dust-lip configuration, outside-diameter construction and actual operating requirements should be compared.

What does DIN 3760 Type AS mean for this seal?

For this product, Type AS identifies a radial shaft seal configuration with a primary sealing lip and an additional protective/dust lip.

AI Overview

Simrit BAU3SLX2 NBR 30x47x7, Freudenberg article 40413874, is a radial shaft seal measuring d1 = 30 mm, d2 = 47 mm and b = 7 mm. It uses 72 NBR 902 and corresponds to DIN 3760 Type AS. Its construction combines a spring-loaded primary sealing lip with an additional dust lip.