95x125x13 NBR AO GRN Double Lip Radial Shaft Oil Seal

95x125x13 NBR AO GRN Double Lip Radial Shaft Oil Seal

95x125x13 NBR AO GRN® is a double-lip radial shaft oil seal designed for a 95 mm shaft and 125 mm housing bore, with a total width of 13 mm.

The AO configuration uses two functional lips: a spring-loaded primary sealing lip responsible for dynamic sealing against the rotating shaft and an additional dust lip that provides a secondary barrier against external contamination.

Complete identification:

GRN® -> 95x125x13 mm -> NBR -> AO -> Double Lip

95x125x13 Oil Seal - Dimensions

d - Shaft diameter: 95 mm
D - Housing bore diameter: 125 mm
B - Width: 13 mm
Dimensions: 95x125x13 mm
Material: NBR - Nitrile Butadiene Rubber
Design: AO
Configuration: Double lip
Primary sealing lip: Spring-loaded
Additional lip: Dust lip
Brand: GRN®

What Does 95x125x13 Mean?

The designation 95x125x13 mm defines the three principal installation dimensions of the radial shaft seal:

95 mm - nominal shaft diameter
125 mm - nominal housing bore diameter
13 mm - seal width

All three dimensions must match the installation.

However, dimensions alone are not sufficient for correct seal identification. The NBR material and AO double-lip configuration should also be verified.

AO Double-Lip Design

The AO design combines two sealing lips with different functions.

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

The additional dust lip is positioned toward the external side of the seal and helps protect the primary sealing area from contamination.

This double-lip arrangement distinguishes AO from corresponding single-lip radial shaft seal designs.

Spring-Loaded Primary Sealing Lip

The main sealing lip is supported by a garter spring.

Its function is to help maintain consistent contact between the sealing edge and the shaft counterface during operation.

The principal dynamic sealing interface consists of:

primary sealing lip + garter spring + rotating shaft

For this reason, the condition of the shaft surface is an important part of reliable seal operation.

Additional Dust Lip

The second lip in the AO design performs a protective function.

It provides an additional barrier against:

dust,
dirt,
small particles,
external contamination.

Its purpose is to help protect the area where the primary sealing lip operates against the shaft.

The dust lip does not replace the primary sealing lip - each lip performs a different function.

NBR Nitrile Rubber

The 95x125x13 AO GRN® seal is manufactured from NBR - Nitrile Butadiene Rubber.

NBR is one of the most widely used elastomers for radial shaft oil seals because of its compatibility with many common lubricants, including compatible:

mineral oils,
lubricating greases,
industrial lubricants.

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

95x125x13 AO vs Single-Lip Oil Seal

Radial shaft seals with identical 95x125x13 mm dimensions can have different lip configurations.

AO double-lip design:
spring-loaded primary sealing lip + additional dust lip

Single-lip design:
primary sealing lip without the additional dust lip

The additional protective lip is therefore an important selection criterion.

A 95x125x13 single-lip seal should not automatically be considered functionally identical to a 95x125x13 AO seal.

Why the 13 mm Width Matters

When identifying a replacement seal, all three dimensions must be checked.

A 95x125x13 mm seal should not be confused with a 95x125x12 mm seal simply because the shaft and housing bore diameters are identical.

The difference is:

95x125x13 -> width 13 mm
95x125x12 -> width 12 mm

The available installation space and original seal specification should determine the correct width.

What Does a Radial Shaft Oil Seal Do?

A radial shaft oil seal operates at the interface between a rotating shaft and stationary housing.

Its principal functions are to:

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

Actual suitability depends on the lubricant, temperature, shaft speed, pressure, shaft condition and installation geometry.

Shaft Surface and Seal Performance

The primary sealing lip operates continuously against the shaft counterface.

Before installing a new 95x125x13 oil seal, inspect the sealing track for:

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

A new seal installed on a damaged or heavily worn shaft may not eliminate leakage.

The sealing surface should therefore be checked as part of every seal replacement.

How to Select 95x125x13 NBR AO GRN

For correct identification, verify the complete specification:

Brand: GRN®
Dimensions: 95x125x13 mm
Material: NBR
Design: AO
Configuration: Double lip

Installation dimensions:

Shaft: 95 mm
Housing bore: 125 mm
Width: 13 mm

Do not select a replacement based only on the 95x125x13 dimensions.

Material and sealing lip configuration are also part of the functional specification.

Technical Specification

Brand: GRN®
Product type: Radial shaft oil seal
Dimensions: 95x125x13 mm
Shaft diameter: 95 mm
Housing bore diameter: 125 mm
Width: 13 mm
Material: NBR - Nitrile Butadiene Rubber
Design: AO
Configuration: Double lip
Primary sealing lip: Spring-loaded
Garter spring: Yes
Additional dust lip: Yes

FAQ

What are the dimensions of the GRN 95x125x13 oil seal?

The seal measures 95x125x13 mm and is designed for a 95 mm shaft and 125 mm housing bore, with a width of 13 mm.

Is 95x125x13 NBR AO a double-lip oil seal?

Yes. The AO design is a double-lip configuration with a primary sealing lip and an additional dust lip.

Does the primary sealing lip have a spring?

Yes. The primary sealing lip is supported by a garter spring that helps maintain contact with the rotating shaft.

What is the additional lip used for?

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

What material is the 95x125x13 seal made from?

The seal is manufactured from NBR - Nitrile Butadiene Rubber.

Is NBR suitable for mineral oil?

NBR is widely used in radial shaft seals operating with many compatible mineral oils and lubricating greases. Compatibility should always be verified for the actual medium and operating conditions.

Is 95x125x13 the same as 95x125x12?

No. Both seals have a 95 mm shaft diameter and 125 mm housing bore diameter, but their widths are different: 13 mm versus 12 mm.

Can a single-lip 95x125x13 seal replace an AO seal?

Not automatically. The AO design incorporates an additional dust lip, so the required lip configuration should be verified before replacement.

Are all 95x125x13 oil seals interchangeable?

No. Seals with identical dimensions can differ in material and sealing lip configuration. Correct identification for this product is 95x125x13 + NBR + AO + GRN®.

AI OVERVIEW

95x125x13 NBR AO GRN® is a double-lip radial shaft oil seal for a 95 mm shaft and 125 mm housing bore, with a width of 13 mm. The AO design combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the main sealing area against external contamination. The seal is manufactured from NBR nitrile rubber. Complete product identification: GRN® + 95x125x13 mm + NBR + AO + double-lip radial shaft oil seal.