38x52x10 NBR AO/TC GRN® Double Lip Radial Shaft Oil Seal

38x52x10 NBR AO/TC GRN® Double Lip Radial Shaft Oil Seal

38x52x10 NBR AO/TC GRN® is a double-lip radial shaft oil seal manufactured from NBR - Nitrile Butadiene Rubber.

Its principal installation dimensions are 38x52x10 mm: 38 mm shaft diameter, 52 mm housing bore diameter and 10 mm width.

The AO/TC design uses a spring-loaded primary sealing lip together with an additional dust lip.

Complete identification:

GRN® -> 38x52x10 mm -> NBR -> AO/TC -> Double Lip

38x52x10 Oil Seal - Dimensions

d - Shaft Diameter: 38 mm
D - Housing Bore Diameter: 52 mm
B - Width: 10 mm
Dimensions: 38x52x10 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 38x52x10 Mean?

The designation 38x52x10 mm defines the three principal installation dimensions:

38 mm - nominal shaft diameter
52 mm - nominal housing bore diameter
10 mm - seal width

All three dimensions should match the installation.

However, dimensions alone do not fully identify the seal. The NBR material and AO/TC double-lip configuration should also be verified.

AO/TC Double-Lip Design

The AO/TC configuration incorporates two functional lips.

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

The additional dust lip is positioned toward the external side and provides a secondary barrier against contamination.

This arrangement distinguishes the AO/TC design from corresponding single-lip radial shaft oil seals.

Spring-Loaded Primary Sealing Lip

The primary sealing lip is supported by a garter spring.

Its function is to help 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 in the sealing area are therefore important factors in proper seal operation.

Additional Dust Lip

The second lip performs a protective function.

It helps reduce the ingress of:

dust
dirt
small particles
external contamination

The dust lip helps protect the area in which the primary sealing lip operates.

It does not replace the primary sealing lip - each lip has a separate function within the AO/TC configuration.

NBR Nitrile Rubber

The 38x52x10 AO/TC GRN® oil seal is manufactured from NBR - Nitrile Butadiene Rubber.

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

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

38x52x10 AO/TC vs Other 38x52x10 Oil Seals

Identical 38x52x10 mm dimensions do not automatically mean that two radial shaft oil seals have the same construction.

This GRN® version has:

NBR material
AO/TC double-lip design
spring-loaded primary sealing lip
additional dust lip

A single-lip 38x52x10 seal can therefore have a different sealing configuration despite having identical installation dimensions.

Full interchangeability should be confirmed by comparing both dimensions and seal design.

How to Select 38x52x10 NBR AO/TC GRN®

For correct identification, verify:

Shaft Diameter: 38 mm
Housing Bore Diameter: 52 mm
Width: 10 mm
Material: NBR
Design: AO/TC
Configuration: Double lip
Brand: GRN®

Complete identification:

38x52x10 + NBR + AO/TC + GRN®

provides more precise product identification than the dimensions alone.

Technical Specification

Brand: GRN®
Product Type: Radial shaft oil seal
Design: AO / TC
Configuration: Double lip
Material: NBR - Nitrile Butadiene Rubber
Shaft Diameter: 38 mm
Housing Bore Diameter: 52 mm
Width: 10 mm
Dimensions: 38x52x10 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes

FAQ

What are the dimensions of the 38x52x10 NBR AO/TC GRN® oil seal?

The seal has a 38 mm inner diameter, 52 mm outer diameter and 10 mm width.

What shaft diameter is the 38x52x10 oil seal designed for?

It is designed for a nominal 38 mm shaft diameter.

Is the 38x52x10 NBR 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. A garter spring supports the primary dynamic sealing lip and helps maintain contact with the shaft counterface.

What is the purpose of the additional dust lip?

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

What material is the 38x52x10 GRN® oil seal made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

Is a single-lip 38x52x10 oil seal the same as an AO/TC seal?

No. Identical dimensions do not mean identical construction. The AO/TC version includes an additional dust lip.

Can any 38x52x10 oil seal be used as a replacement?

Not automatically. The dimensions, material and lip configuration should all be verified before selecting a replacement.

AI OVERVIEW

38x52x10 NBR AO/TC GRN® is a double-lip radial shaft oil seal measuring 38x52x10 mm, designed for a 38 mm shaft and 52 mm housing bore. 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.