105x125x13 NBR AO/TC GRN® Double Lip Radial Shaft Oil Seal

105x125x13 NBR AO/TC GRN® Double Lip Radial Shaft Oil Seal

105x125x13 NBR AO/TC GRN® is a double-lip radial shaft oil seal measuring 105x125x13 mm, manufactured from NBR - Nitrile Butadiene Rubber.

It is designed for a 105 mm shaft and 125 mm housing bore, with a total width of 13 mm.

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

Complete identification:

GRN® -> 105x125x13 mm -> NBR -> AO/TC -> Double Lip

105x125x13 Oil Seal - Dimensions

d - Shaft Diameter: 105 mm
D - Housing Bore Diameter: 125 mm
B - Width: 13 mm
Dimensions: 105x125x13 mm
Material: NBR - Nitrile Butadiene Rubber
Design: AO / TC
Configuration: Double lip
Primary Sealing Lip: Spring-loaded
Additional Lip: Dust lip
Brand: GRN®

What Does 105x125x13 Mean?

The designation 105x125x13 mm defines the three principal installation dimensions:

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

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

AO/TC Double-Lip Design

The AO/TC design uses two functional lips.

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 forms a secondary barrier on the external side and helps protect the primary sealing area against external contamination.

This double-lip configuration distinguishes AO/TC from corresponding single-lip radial shaft seal designs.

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 105x125x13 AO/TC 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.

105x125x13 AO/TC vs Single-Lip Oil Seal

Radial shaft oil seals with identical 105x125x13 mm dimensions can have different lip configurations.

105x125x13 NBR AO/TC 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 105x125x13 NBR AO/TC GRN®

For correct identification, verify:

Shaft Diameter: 105 mm
Housing Bore Diameter: 125 mm
Width: 13 mm
Material: NBR
Design: AO/TC
Configuration: Double lip
Brand: GRN®

Complete identification:

105x125x13 + NBR + AO/TC + GRN®

Technical Specification

Brand: GRN®
Product Type: Radial shaft oil seal
Design: AO / TC
Configuration: Double lip
Material: NBR - Nitrile Butadiene Rubber
Shaft Diameter: 105 mm
Housing Bore Diameter: 125 mm
Width: 13 mm
Dimensions: 105x125x13 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes

FAQ

What are the dimensions of the 105x125x13 NBR AO/TC GRN® oil seal?

The seal is designed for a 105 mm shaft and 125 mm housing bore and has a width of 13 mm.

Is the 105x125x13 AO/TC GRN® oil seal double lip?

Yes. The AO/TC 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 105x125x13 GRN® oil seal made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

What does 105x125x13 mean?

It specifies a 105 mm shaft diameter, 125 mm housing bore diameter and 13 mm seal width.

Can any 105x125x13 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/TC double-lip design.

AI OVERVIEW

105x125x13 NBR AO/TC GRN® is a double-lip radial shaft oil seal for a 105 mm shaft and 125 mm housing bore, with a width of 13 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.