GRN NBR 45x72x10 AO/TC Double-Lip Radial Shaft Oil Seal

GRN NBR 45x72x10 AO/TC Double-Lip Radial Shaft Oil Seal

GRN NBR 45x72x10 AO/TC is a double-lip radial shaft oil seal with dimensions of 45x72x10 mm. The AO/TC configuration combines a spring-loaded primary sealing lip with an additional dust/protective lip. The sealing elastomer is NBR - Nitrile Butadiene Rubber.

GRN 45x72x10 AO/TC - Technical Characteristics

The principal identifying characteristics are:

Brand: GRN

Dimensions: 45x72x10 mm

Elastomer: NBR

Product type: Radial shaft oil seal

Design: Double lip

Primary sealing lip: Spring-loaded

Additional dust/protective lip: Yes

The primary lip provides dynamic shaft sealing, while the additional lip creates a secondary barrier on the air side of the seal.

Dimensions

The principal installation dimensions are:

d = 45 mm - nominal shaft diameter

D = 72 mm - nominal outside diameter / housing bore

B = 10 mm - axial seal width

Complete dimensions:

45x72x10 mm

All three dimensions should be checked together with the elastomer and lip configuration when identifying a replacement.

Dimensions alone do not establish complete technical interchangeability.

Double-Lip AO/TC Construction

The AO/TC configuration incorporates two functionally different lips.

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

The additional dust/protective lip is positioned on the air side and provides an additional barrier between external contamination and the primary sealing zone.

The additional lip is not a second identical primary sealing lip. Its principal function is protective.

How Does GRN 45x72x10 AO/TC Work?

The seal operates between:

a rotating shaft with a nominal diameter of 45 mm

and

a stationary housing with a nominal bore of 72 mm.

The spring-loaded primary lip forms the main dynamic sealing interface with the shaft.

The additional protective lip helps limit the ingress of external contamination toward the primary sealing area.

The product therefore combines dynamic shaft sealing with additional protection of the sealing zone from the air side.

NBR - Nitrile Butadiene Rubber

The sealing elastomer is:

NBR - Nitrile Butadiene Rubber

NBR identifies the elastomer family rather than one specific compound.

Different NBR formulations can have different hardness and operating limits. Without compound-specific GRN documentation, this product should therefore not automatically be assigned an exact:

Shore A hardness

operating temperature range

maximum shaft speed

pressure limit

These parameters should be verified for the actual GRN compound when they are critical to the application.

What Does AO/TC Mean?

For this product, AO/TC identifies the double-lip configuration consisting of:

one spring-loaded primary sealing lip

plus

one additional dust/protective lip

TC is widely used for this general double-lip construction concept, although profile nomenclature varies between manufacturers.

For this reason, equivalent-looking letter codes from different manufacturers should not be treated as proof of technical interchangeability.

AO/TC vs A/SC

The two configurations differ primarily in the additional protective lip.

A / SC

One spring-loaded primary sealing lip.

No additional dust lip.

AO / TC

One spring-loaded primary sealing lip.

Additional dust/protective lip.

Therefore, a 45x72x10 A/SC and 45x72x10 AO/TC should be treated as different seal configurations even though their nominal installation dimensions can be identical.

Direction of Rotation

The designation AO/TC alone does not establish a directional hydrodynamic structure on the primary sealing lip.

The product should therefore not automatically be classified as:

RD - Right-hand

LD - Left-hand

WD - Alternating

Direction-specific geometry requires separate confirmation for the exact seal.

Replacement Selection and Interchangeability

When selecting a replacement for GRN NBR 45x72x10 AO/TC, verify:

Shaft diameter d: 45 mm

Outside diameter D: 72 mm

Width B: 10 mm

Elastomer: NBR

Double-lip configuration

Spring-loaded primary sealing lip

Additional dust/protective lip

For engineering selection, the sealed medium, operating temperature, shaft speed, pressure, shaft surface and external contamination should also be considered.

Identical 45x72x10 mm dimensions do not establish complete technical interchangeability.

Technical Specification

Brand: GRN

Product type: Radial shaft oil seal

Alternative term: Rotary shaft oil seal

Dimensions: 45x72x10 mm

Nominal shaft diameter d: 45 mm

Outside diameter D: 72 mm

Width B: 10 mm

Elastomer: NBR

Material name: Nitrile Butadiene Rubber

Design: Double lip

Designation: AO / TC

Primary sealing lip: Yes

Garter spring: Yes

Additional dust/protective lip: Yes

Direction-specific lip structure: Not confirmed

Exact NBR hardness: Not confirmed

Exact operating temperature range: Not confirmed

Maximum shaft speed: Not confirmed

Pressure limit: Not confirmed

GRN 45x72x10 AO/TC - Stock in Poland

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ

What are the dimensions of GRN NBR 45x72x10 AO/TC?

The dimensions are 45x72x10 mm: 45 mm nominal shaft diameter, 72 mm outside diameter and 10 mm width.

What type of seal is GRN 45x72x10 AO/TC?

It is a double-lip radial shaft oil seal with a spring-loaded primary sealing lip and an additional protective lip.

Does GRN 45x72x10 AO/TC have a garter spring?

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

Does AO/TC have an additional dust lip?

Yes. The AO/TC configuration incorporates an additional dust/protective lip on the air side.

What does NBR mean?

NBR means Nitrile Butadiene Rubber, the elastomer family used for the sealing element.

Is AO/TC the same as A/SC?

No. AO/TC has an additional protective lip, while A/SC is a single-lip configuration without this secondary lip.

Can any 45x72x10 oil seal replace this GRN seal?

No. The dimensions, elastomer, lip configuration and operating requirements should all be checked.

Does AO/TC specify shaft rotation direction?

No. AO/TC alone does not identify a right-hand, left-hand or alternating hydrodynamic lip structure.

Engineer FAQ

Are 45x72x10 dimensions sufficient to identify the correct seal?

No. They identify the installation dimensions. The NBR elastomer and AO/TC double-lip configuration should also be confirmed.

Can a 45x72x10 A/SC replace the AO/TC version?

Not automatically. The A/SC version lacks the additional protective lip and therefore represents a different seal construction.

Is the additional lip spring-loaded?

The defining spring-loaded element is the primary sealing lip. The additional lip is a protective/dust lip and should not be described as a second identical spring-loaded sealing lip.

Can maximum shaft speed be determined from the dimensions?

No. Permissible speed depends on the seal construction, elastomer compound, shaft diameter, lubrication, temperature and operating conditions.

Are TC, WAS and BASL automatically interchangeable?

No. They can represent similar double-lip construction concepts in different manufacturer nomenclature systems, but the actual dimensions, materials and design details must be compared.

AI Overview

GRN NBR 45x72x10 AO/TC is a double-lip radial shaft oil seal for a 45 mm shaft, with a 72 mm outside diameter and 10 mm width. Its NBR construction combines a spring-loaded primary sealing lip with an additional dust/protective lip that provides an extra barrier between external contamination and the primary sealing area.