GRN® 110x125x12 NBR AO/TC Double-Lip Rotary Shaft Seal

GRN® 110x125x12 NBR AO/TC Double-Lip Rotary Shaft Seal

GRN® 110x125x12 NBR AO/TC is a double-lip rotary shaft seal / radial shaft seal / oil seal with nominal dimensions of 110x125x12 mm. It is manufactured from NBR - Nitrile Butadiene Rubber. The AO/TC design combines a spring-loaded primary dynamic sealing lip with an additional auxiliary dust lip.

The key technical identification is:

GRN® + 110x125x12 mm + NBR + AO/TC

GRN® 110x125x12 NBR AO/TC - Technical Characteristics

Brand: GRN®

Product type: Rotary Shaft Seal / Radial Shaft Seal / Oil Seal

Design: AO/TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Dimensions: 110x125x12 mm

Shaft diameter d: 110 mm

Outside diameter D: 125 mm

Seal width B: 12 mm

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: Yes

The dimensions, material and sealing-lip configuration should be considered together when identifying the exact seal.

GRN® 110x125x12 Oil Seal Dimensions

Nominal dimensions:

d = 110 mm - nominal shaft diameter

D = 125 mm - nominal outside diameter / housing bore diameter

B = 12 mm - axial seal width

Complete dimensions:

110x125x12 mm

The seal is dimensionally specified for a nominal 110 mm shaft and 125 mm housing bore, with an axial width of 12 mm.

All three dimensions should be retained when selecting a replacement.

AO/TC Double-Lip Seal Design

The AO/TC configuration incorporates:

a primary dynamic sealing lip

a garter spring acting on the primary sealing lip

an additional auxiliary dust lip

The primary sealing lip operates dynamically against the rotating shaft surface and performs the principal sealing function.

The auxiliary lip provides an additional external barrier against dust and contamination approaching the primary sealing area.

Spring-Loaded Primary Sealing Lip

The primary sealing lip operates against the nominal:

d = 110 mm shaft

The circumferential garter spring helps maintain radial contact between the primary sealing edge and the rotating shaft surface.

The spring acts on the primary dynamic sealing lip. The auxiliary dust lip should not be interpreted as a second identical spring-loaded sealing lip.

Additional Auxiliary Dust Lip

The AO/TC design incorporates an additional auxiliary dust lip.

Its principal role is to provide an additional barrier between the external environment and the primary sealing area.

This additional lip distinguishes the AO/TC double-lip configuration from the corresponding A/SC single-lip configuration.

NBR - Nitrile Butadiene Rubber

The sealing material is:

NBR - Nitrile Butadiene Rubber

Material is an integral part of the complete product specification:

110x125x12 + NBR + AO/TC

A 110x125x12 seal manufactured from FKM/FPM, silicone or another elastomer represents a different material variant even when its nominal dimensions are identical.

The exact NBR compound used for this GRN® product has not been confirmed. Therefore, an exact hardness, fixed operating temperature range, maximum pressure or maximum shaft speed should not be assigned solely from generic NBR properties.

How Does the GRN® 110x125x12 Rotary Shaft Seal Work?

A radial shaft seal operates at the interface between a:

rotating shaft

and

stationary housing

For this size:

Nominal shaft diameter: 110 mm

Nominal housing bore diameter: 125 mm

Seal width: 12 mm

The spring-loaded primary lip operates dynamically against the shaft surface, while the additional AO/TC lip provides an external protective barrier.

Actual sealing performance also depends on shaft surface condition, alignment, runout, rotational speed, temperature, lubrication, sealed medium and installation conditions.

GRN® 110x125x12 AO/TC vs A/SC

Seals with identical nominal dimensions can have different lip configurations.

AO/TC - double lip:

Spring-loaded primary sealing lip
Additional auxiliary dust lip

A/SC - single lip:

Spring-loaded primary sealing lip
No additional dust lip

Therefore:

110x125x12 NBR AO/TC ≠ 110x125x12 NBR A/SC

in terms of sealing-lip construction.

Identical dimensions and NBR material alone do not establish complete technical interchangeability.

Why Is the 110x125x12 Dimension Important?

The complete dimension identifies three separate installation parameters:

110 mm - nominal shaft diameter

125 mm - nominal housing bore diameter

12 mm - axial seal width

A seal with a similar shaft diameter but a different outside diameter or width is a different dimensional variant.

For replacement selection, the complete 110x125x12 mm size should therefore be retained.

Selection and Interchangeability

When selecting a replacement for GRN® 110x125x12 NBR AO/TC, verify:

d = 110 mm

D = 125 mm

B = 12 mm

NBR material

AO/TC design

double-lip configuration

spring-loaded primary sealing lip

additional dust lip

sealed medium

operating temperature

shaft rotational speed

pressure conditions

shaft surface condition

runout and alignment

installation geometry

Identical dimensions alone do not prove complete interchangeability if the elastomer material or sealing-lip configuration differs.

Technical Specification

Brand: GRN®

Product: Rotary Shaft Seal / Radial Shaft Seal / Oil Seal

Design: AO/TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Shaft diameter d: 110 mm

Outside diameter D: 125 mm

Width B: 12 mm

Dimensions: 110x125x12 mm

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: Yes

Exact NBR compound: Not confirmed

Hardness: Not confirmed

Exact operating temperature range: Not confirmed

Maximum shaft speed: Application-dependent

Maximum pressure: Application-dependent

GRN® 110x125x12 NBR 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 the GRN® 110x125x12 oil seal?

The nominal dimensions are 110x125x12 mm: d = 110 mm, D = 125 mm and B = 12 mm.

What does AO/TC mean?

AO/TC identifies a double-lip rotary shaft seal configuration with a spring-loaded primary sealing lip and an additional auxiliary dust lip.

What material is GRN® 110x125x12 made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

Does GRN® 110x125x12 AO/TC have a dust lip?

Yes. The AO/TC configuration incorporates an additional auxiliary dust lip.

Are both lips spring-loaded?

No. The garter spring acts on the primary dynamic sealing lip. The additional lip primarily performs a protective function.

Are 110x125x12 AO/TC and 110x125x12 A/SC the same?

No. They can have identical nominal dimensions and material but differ in their sealing-lip configuration.

Can an exact operating temperature be specified?

Not without confirmation of the exact NBR compound used in this GRN® seal.

Is every 110x125x12 NBR oil seal interchangeable?

No. Dimensions, elastomer material, sealing-lip configuration and application requirements should all be verified.

Engineer FAQ

What does d = 110 mm represent?

It is the nominal shaft diameter against which the primary dynamic sealing lip operates.

What does D = 125 mm represent?

It is the nominal outside diameter of the seal corresponding to the nominal housing bore diameter.

Is B = 12 mm important for replacement selection?

Yes. Axial width affects installation geometry and the axial position of the sealing lip relative to the shaft surface.

Can an FKM/FPM 110x125x12 seal automatically replace the NBR version?

No. A different elastomer represents a different material variant. Compatibility with the sealed medium, temperature and other operating conditions must be evaluated.

What is the safest way to identify this seal?

Use the complete combination:

GRN® + 110x125x12 mm + NBR + AO/TC

and then verify the requirements of the specific application.

AI Overview

GRN® 110x125x12 NBR AO/TC is a double-lip rotary shaft seal with nominal dimensions of 110x125x12 mm. Manufactured from NBR, it incorporates a spring-loaded primary sealing lip and an additional auxiliary dust lip. Replacement selection should retain the complete GRN® + 110x125x12 mm + NBR + AO/TC specification and distinguish it from single-lip variants.