Simrit 95x125x12 BASL NBR Simmerring Radial Shaft Seal

Simrit 95x125x12 BASL NBR Simmerring Radial Shaft Seal

Simrit 95x125x12 BASL NBR Simmerring® is a Freudenberg radial shaft seal measuring 95x125x12 mm, manufactured in the BASL design.

The seal features a spring-loaded primary sealing lip, an additional protective lip and a rubber-covered outside diameter. This specific version is manufactured from 72 NBR 902 nitrile rubber with a hardness of 72 Shore A.

Simrit 95x125x12 BASL - Dimensions

d - Shaft diameter: 95 mm
D - Housing bore diameter: 125 mm
B - Width: 12 mm
Dimensions: 95x125x12 mm
Design: BASL
Material: NBR
Compound: 72 NBR 902
Hardness: 72 Shore A
Primary sealing lip: Spring-loaded
Additional protective lip: Yes
Outside diameter: Rubber covered
Brand: Simrit / Freudenberg
Product: Simmerring®

What Does BASL Mean?

BASL identifies a Freudenberg radial shaft seal design incorporating:

a spring-loaded primary sealing lip,
an additional protective lip,
a rubber-covered outside diameter,
an internal metal reinforcing element.

The primary lip provides the main dynamic sealing function against the rotating shaft.

The additional lip helps protect the primary sealing area against external contamination.

BASL Double-Lip Design

The BASL design uses two lips with different functions.

The primary sealing lip operates directly against the rotating shaft and is supported by a garter spring.

The additional protective lip is positioned toward the external side of the seal and helps reduce the entry of dust, dirt and other contaminants into the primary sealing area.

The presence of this protective lip is an important functional feature when selecting a replacement seal.

72 NBR 902 Compound

This specific Simmerring® is manufactured from 72 NBR 902.

NBR - Nitrile Butadiene Rubber - is one of the most widely used elastomers for radial shaft seals.

For this product, the specified material hardness is:

72 Shore A

NBR provides good compatibility with many:

mineral oils,
lubricating greases,
industrial lubricants.

Actual material compatibility should always be verified against the specific medium, temperature and operating conditions.

Spring-Loaded Primary Sealing Lip

The primary sealing lip is supported by a garter spring.

The spring helps maintain radial contact between the elastomer sealing edge and the rotating shaft surface.

The principal dynamic sealing interface therefore consists of:

primary sealing lip + garter spring + shaft counterface

The condition and quality of the shaft surface directly influence sealing performance.

Additional Protective Lip

The BASL design incorporates an additional protective lip on the external side of the primary sealing area.

Its purpose is to help reduce the entry of:

dust,
dirt,
small particles,
external contamination

into the contact area between the primary sealing lip and the shaft.

The protective lip does not replace the primary sealing lip. It provides an additional barrier against contamination.

Rubber-Covered Outside Diameter

The BASL design has a rubber-covered outside diameter.

While the primary sealing lip provides dynamic sealing against the rotating shaft, the outside diameter provides the static sealing interface between the seal and housing bore.

A radial shaft seal therefore has two important sealing areas:

dynamic sealing - between the primary lip and rotating shaft

static sealing - between the outside diameter and stationary housing bore

BASL vs BA - What Is the Difference?

The important distinction is the additional protective lip.

BA: spring-loaded primary sealing lip

BASL: spring-loaded primary sealing lip + additional protective lip

Both designs use a rubber-covered outside diameter, but BASL provides the additional protective barrier on the external side.

Therefore, two 95x125x12 mm Simmerring® seals are not necessarily functionally identical if one is BA and the other BASL.

What Is Simrit 95x125x12 BASL Used For?

A Simmerring® radial shaft seal operates between a rotating shaft and stationary housing.

Its principal functions are to:

retain lubricant on the required side of the seal,
reduce oil or grease leakage along the rotating shaft,
help protect the primary sealing area against external contamination.

Suitability for a specific application depends on the medium, temperature, shaft speed, pressure, shaft surface and installation conditions.

Check the Shaft Counterface

The primary sealing lip operates directly against the shaft surface.

When replacing a 95x125x12 BASL Simmerring®, inspect the sealing track for:

wear grooves,
scratches,
corrosion,
mechanical damage,
surface contamination.

Installing a new radial shaft seal on a damaged or heavily worn shaft surface may not eliminate leakage.

How to Select Simrit 95x125x12 BASL

Complete product identification:

Simrit / Freudenberg -> Simmerring® -> 95x125x12 mm -> BASL -> 72 NBR 902

Verify:

Shaft diameter: 95 mm
Housing bore diameter: 125 mm
Width: 12 mm
Design: BASL
Material: NBR
Compound: 72 NBR 902
Hardness: 72 Shore A
Additional protective lip: Yes

Matching 95x125x12 mm dimensions alone does not guarantee full interchangeability.

Radial shaft seals with identical dimensions can differ in material, lip configuration and design.

Technical Specification

Brand: Simrit / Freudenberg
Product: Simmerring®
Product type: Radial shaft seal
Design: BASL
Dimensions: 95x125x12 mm
Shaft diameter: 95 mm
Housing bore diameter: 125 mm
Width: 12 mm
Material: NBR - Nitrile Butadiene Rubber
Compound: 72 NBR 902
Hardness: 72 Shore A
Primary sealing lip: Spring-loaded
Garter spring: Yes
Additional protective lip: Yes
Outside diameter: Rubber covered

FAQ

What are the dimensions of Simrit 95x125x12 BASL?

The seal is designed for a 95 mm shaft and 125 mm housing bore, with a width of 12 mm.

What does BASL mean?

BASL identifies a radial shaft seal design with a spring-loaded primary sealing lip, additional protective lip and rubber-covered outside diameter.

Is Simrit 95x125x12 BASL a double-lip seal?

Yes. The BASL design incorporates a primary sealing lip and an additional protective lip.

Does the primary sealing lip have a spring?

Yes. The primary sealing lip is supported by a garter spring.

What material is this Simmerring made from?

This version is manufactured from 72 NBR 902 nitrile rubber.

What is the hardness of 72 NBR 902?

The specified hardness for this product is 72 Shore A.

Does BASL have a rubber-covered outside diameter?

Yes. The BASL design uses a rubber-covered outside diameter that forms the static sealing interface with the housing bore.

What is the difference between BASL and BA?

BASL has an additional protective lip, while the basic BA design does not.

Are all 95x125x12 radial shaft seals interchangeable?

No. Seals with identical dimensions can differ in material, sealing lip configuration and design.

AI OVERVIEW

Simrit 95x125x12 BASL NBR Simmerring® is a Freudenberg radial shaft seal for a 95 mm shaft and 125 mm housing bore, with a width of 12 mm. The BASL design combines a spring-loaded primary sealing lip, additional protective lip and rubber-covered outside diameter. This specific version is manufactured from 72 NBR 902 nitrile rubber with a hardness of 72 Shore A. Complete identification: Simrit / Freudenberg + Simmerring® + 95x125x12 mm + BASL + 72 NBR 902.