30x42x6/6.5 NBR BABSL Double Lip Radial Shaft Oil Seal

30x42x6/6.5 NBR BABSL Double Lip Radial Shaft Oil Seal

30x42x6/6.5 NBR BABSL is a double-lip radial shaft oil seal manufactured from NBR - Nitrile Butadiene Rubber.

Its dimensions are 30x42x6/6.5 mm: 30 mm nominal shaft diameter, 42 mm nominal housing bore diameter and a width specification of 6/6.5 mm.

The BABSL design incorporates a spring-loaded primary sealing lip and an additional protective dust lip.

Complete identification:

30x42x6/6.5 mm -> NBR -> BABSL -> Double Lip

30x42x6/6.5 BABSL - Dimensions

d - Shaft Diameter: 30 mm
D - Housing Bore Diameter: 42 mm
Width: 6/6.5 mm
Dimensions: 30x42x6/6.5 mm
Material: NBR - Nitrile Butadiene Rubber
Design: BABSL
Configuration: Double lip
Primary Sealing Lip: Spring-loaded
Additional Lip: Protective dust lip

What Does 30x42x6/6.5 Mean?

The designation 30x42x6/6.5 mm identifies the principal installation dimensions and profile geometry:

30 mm - nominal shaft diameter
42 mm - nominal housing bore diameter
6/6.5 mm - width specification associated with the seal profile

The complete 30x42x6/6.5 mm designation should be retained when identifying the product.

It should not automatically be shortened to 30x42x6 mm when searching for an exact replacement.

BABSL Double-Lip Design

The BABSL design incorporates two functional lips.

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

The additional protective lip is positioned toward the external side of the seal and helps reduce the ingress of contamination into the primary sealing area.

The two lips perform separate functions within the sealing system.

Spring-Loaded Primary Sealing Lip

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

The principal dynamic sealing interface consists of:

primary sealing lip + garter spring + shaft counterface

The spring helps maintain radial contact between the sealing edge and the shaft surface during operation.

The condition and surface finish of the shaft counterface are therefore important factors for proper seal operation.

Additional Dust Lip

The additional lip performs a protective function.

It helps reduce the ingress of:

dust
dirt
small particles
external contamination

toward the primary sealing area.

The dust lip does not replace the primary dynamic sealing lip. Each lip has a separate function.

NBR - Nitrile Butadiene Rubber

The 30x42x6/6.5 BABSL oil seal is manufactured from NBR - Nitrile Butadiene Rubber.

NBR is widely used for radial shaft oil seals and is compatible with many commonly used mineral oils, lubricating greases and industrial lubricants.

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

BABSL vs Standard Double-Lip Oil Seal

BABSL should be identified by its complete design designation rather than simply by the number of sealing lips.

30x42x6/6.5 NBR BABSL:
spring-loaded primary sealing lip
additional protective lip
BABSL profile
30x42x6/6.5 mm complete dimension

Standard double-lip oil seal:
may have a spring-loaded primary lip
may have an additional dust lip
may use different profile geometry and width

The BABSL designation should therefore be retained when selecting an exact replacement.

30x42x6/6.5 BABSL vs 30x42x6 AO

Both seals can have a 30 mm shaft diameter, 42 mm housing bore and a double-lip configuration.

However, this does not mean that they are automatically identical.

BABSL: 30x42x6/6.5 mm
AO: 30x42x6 mm

The BABSL version has its own profile geometry and a complete width designation of 6/6.5 mm.

Full dimensions and design should therefore be compared before substitution.

Why Is the Complete Designation Important?

The two principal diameters alone do not completely identify a radial shaft oil seal.

For this product:

30x42x6/6.5 mm - dimensions and profile geometry
NBR - elastomer material
BABSL - seal design
Double Lip - sealing-lip configuration

Complete identification:

30x42x6/6.5 + NBR + BABSL + Double Lip

helps distinguish this version from other 30x42 mm radial shaft seals.

How to Select 30x42x6/6.5 NBR BABSL

For correct identification, verify:

Shaft Diameter: 30 mm
Housing Bore Diameter: 42 mm
Width: 6/6.5 mm
Material: NBR
Design: BABSL
Configuration: Double lip
Primary Sealing Lip: Spring-loaded
Additional Protective Lip: Yes

The complete 30x42x6/6.5 NBR BABSL designation should be compared when selecting a replacement.

Dimensions alone do not confirm full interchangeability.

Technical Specification

Product Type: Radial shaft oil seal
Design: BABSL
Configuration: Double lip
Material: NBR - Nitrile Butadiene Rubber
Shaft Diameter: 30 mm
Housing Bore Diameter: 42 mm
Width: 6/6.5 mm
Dimensions: 30x42x6/6.5 mm
Primary Sealing Lip: Spring-loaded
Additional Protective Lip: Yes
Manufacturer: No name / neutral

FAQ

What are the dimensions of the 30x42x6/6.5 BABSL oil seal?

The complete dimensions are 30x42x6/6.5 mm: 30 mm shaft diameter, 42 mm housing bore diameter and a width specification of 6/6.5 mm.

What does BABSL mean?

BABSL identifies the seal profile. This configuration incorporates a spring-loaded primary sealing lip and an additional protective lip.

Is the 30x42x6/6.5 BABSL oil seal double lip?

Yes. It has a primary dynamic sealing lip and an additional protective dust lip.

Does the BABSL oil seal have a garter spring?

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

What material is this BABSL oil seal made from?

This version is manufactured from NBR - Nitrile Butadiene Rubber.

What shaft diameter is this seal designed for?

The nominal shaft diameter is 30 mm.

Is 30x42x6/6.5 BABSL the same as 30x42x6?

Not necessarily. The BABSL version has a complete width specification of 6/6.5 mm and its own profile geometry. The complete designation should be checked when selecting a replacement.

Can 30x42x6/6.5 BABSL replace a 30x42x6 AO oil seal?

Not automatically. Although the principal diameters are identical and both can be double-lip designs, their profile geometry and width specifications differ. Installation requirements should be verified before substitution.

AI OVERVIEW

30x42x6/6.5 NBR BABSL is a double-lip radial shaft oil seal designed for a 30 mm shaft and 42 mm housing bore. Manufactured from NBR, the BABSL profile combines a spring-loaded primary sealing lip with an additional protective dust lip. The complete 30x42x6/6.5 mm dimension should be retained when selecting a replacement.