25x47x10 NBR AO GRN® Double Lip Radial Shaft Oil Seal

25x47x10 NBR AO GRN® Double Lip Radial Shaft Oil Seal

25x47x10 NBR AO GRN® is a double-lip radial shaft oil seal measuring 25x47x10 mm, manufactured from NBR - Nitrile Butadiene Rubber.

It is designed for a 25 mm shaft and 47 mm housing bore, with a total width of 10 mm.

The AO configuration combines a spring-loaded primary sealing lip with an additional dust lip.

Complete identification:

GRN® -> 25x47x10 mm -> NBR -> AO -> Double Lip

25x47x10 Oil Seal - Dimensions

d - Shaft Diameter: 25 mm
D - Housing Bore Diameter: 47 mm
B - Width: 10 mm
Dimensions: 25x47x10 mm
Material: NBR - Nitrile Butadiene Rubber
Design: AO
Configuration: Double lip
Primary Sealing Lip: Spring-loaded
Additional Lip: Dust lip
Brand: GRN®

What Does 25x47x10 Mean?

The designation 25x47x10 mm defines the three principal installation dimensions:

25 mm - nominal shaft diameter
47 mm - nominal housing bore diameter
10 mm - seal width

Dimensions alone do not provide complete product identification. For this version, the NBR material and AO double-lip configuration should also be verified.

AO Double-Lip Design

The AO design uses two functional lips with different roles.

The primary sealing lip operates dynamically against the rotating shaft surface and provides the main sealing function. A garter spring helps maintain radial contact between the elastomer sealing edge and the shaft counterface.

The additional dust lip provides a secondary barrier on the external side and helps protect the primary sealing area against external contamination.

This double-lip arrangement distinguishes the AO design from corresponding single-lip radial shaft seals.

Spring-Loaded Primary Sealing Lip

The primary sealing lip is supported by a garter spring.

The spring helps maintain consistent contact between the sealing edge and the rotating shaft counterface.

The principal dynamic sealing interface consists of:

primary sealing lip + garter spring + shaft counterface

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

Additional Dust Lip

The second lip performs a protective function.

It helps limit the ingress of:

dust
dirt
small particles
external contamination

The dust lip helps protect the area where the primary sealing lip operates. It does not replace the primary sealing lip - each lip performs a different function.

NBR Nitrile Rubber

The 25x47x10 AO GRN® seal is manufactured from NBR - Nitrile Butadiene Rubber.

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

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

25x47x10 AO vs Single-Lip Oil Seal

Radial shaft oil seals with identical 25x47x10 mm dimensions can have different lip configurations.

25x47x10 NBR AO GRN®:
spring-loaded primary sealing lip
additional dust lip

Single-lip design:
spring-loaded primary sealing lip
no additional dust lip

Therefore, identical dimensions do not automatically confirm full interchangeability.

How to Select 25x47x10 NBR AO GRN®

For correct identification, verify:

Shaft Diameter: 25 mm
Housing Bore Diameter: 47 mm
Width: 10 mm
Material: NBR
Design: AO
Configuration: Double lip
Brand: GRN®

Complete identification by 25x47x10 + NBR + AO + GRN® helps distinguish this version from other radial shaft oil seals with the same dimensions.

Technical Specification

Brand: GRN®
Product Type: Radial shaft oil seal
Design: AO
Configuration: Double lip
Material: NBR - Nitrile Butadiene Rubber
Shaft Diameter: 25 mm
Housing Bore Diameter: 47 mm
Width: 10 mm
Dimensions: 25x47x10 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes

FAQ

What are the dimensions of the 25x47x10 NBR AO GRN® oil seal?

The seal is designed for a 25 mm shaft and 47 mm housing bore and has a width of 10 mm.

Is the 25x47x10 NBR AO GRN® oil seal double lip?

Yes. The AO design combines a spring-loaded primary sealing lip with an additional dust lip.

Does the primary sealing lip have a spring?

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

What is the function of the additional dust lip?

The additional lip helps protect the primary sealing area against dust, dirt, small particles and other external contamination.

What material is the 25x47x10 GRN® oil seal made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

What does 25x47x10 mean?

It specifies a 25 mm shaft diameter, 47 mm housing bore diameter and 10 mm seal width.

Can any 25x47x10 oil seal be used as a replacement?

Not automatically. In addition to the dimensions, the material and lip configuration should be verified. This version is NBR with an AO double-lip design.

AI OVERVIEW

25x47x10 NBR AO GRN® is a double-lip radial shaft oil seal for a 25 mm shaft and 47 mm housing bore, with a width of 10 mm. Manufactured from NBR, it combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the primary sealing area against external contamination.