GRN 10x30x7 NBR AO/TC Double-Lip Rotary Shaft Seal

GRN 10x30x7 NBR AO/TC Double-Lip Rotary Shaft Seal

GRN 10x30x7 NBR AO/TC is a double-lip rotary shaft seal / radial shaft seal / oil seal with nominal dimensions of 10x30x7 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 + 10x30x7 mm + NBR + AO/TC

GRN 10x30x7 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: 10x30x7 mm

Shaft diameter d: 10 mm

Housing bore diameter D: 30 mm

Seal width B: 7 mm

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: Yes

The dimensions, elastomer material and lip configuration should be considered together when identifying this seal.

GRN 10x30x7 Oil Seal Dimensions

Nominal dimensions:

d = 10 mm - nominal shaft diameter

D = 30 mm - nominal housing bore diameter

B = 7 mm - axial seal width

Complete dimensions:

10x30x7 mm

The seal is dimensionally specified for a nominal 10 mm shaft and a 30 mm housing bore, with an axial width of 7 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 lip operates dynamically against the rotating shaft surface and performs the principal sealing function.

The auxiliary lip provides an additional external barrier between the surrounding environment and the primary sealing area.

Spring-Loaded Primary Sealing Lip

The primary sealing lip operates against the nominal 10 mm shaft.

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

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

Effective sealing also depends on shaft surface quality, alignment, runout, lubrication and operating conditions.

Additional Dust Lip

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

Its primary role is protective, providing an additional barrier against dust and external contamination approaching the primary sealing area.

This additional lip is the principal construction feature distinguishing the AO/TC double-lip design from a corresponding A/SC single-lip design.

NBR - Nitrile Butadiene Rubber

Seal material:

NBR - Nitrile Butadiene Rubber

NBR forms an integral part of the product specification:

10x30x7 + NBR + AO/TC

A 10x30x7 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 10x30x7 Rotary Shaft Seal Work?

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

Nominal shaft diameter:

10 mm

Nominal housing bore diameter:

30 mm

Axial seal width:

7 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, runout, alignment, rotational speed, temperature, lubrication, sealed medium and correct installation.

GRN 10x30x7 AO/TC vs A/SC

Two seals with identical nominal dimensions can have different lip configurations.

AO/TC - double-lip design:

Spring-loaded primary sealing lip
Additional auxiliary dust lip

A/SC - single-lip design:

Spring-loaded primary sealing lip
No additional dust lip

Therefore:

10x30x7 NBR AO/TC ≠ 10x30x7 NBR A/SC

in terms of sealing-lip construction.

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

GRN 10x30x7 vs 10x26x7

Both variants have:

d = 10 mm

B = 7 mm

but different outside diameters:

10x30x7: D = 30 mm

10x26x7: D = 26 mm

The outside diameter differs by 4 mm, meaning these seals are intended for different nominal housing bore diameters.

They are not dimensionally interchangeable.

GRN 10x30x7 vs 10x25x7

Both variants have:

d = 10 mm

B = 7 mm

but:

10x30x7: D = 30 mm

10x25x7: D = 25 mm

The outside diameter differs by 5 mm. These are different seal sizes.

Selection and Interchangeability

When selecting a replacement for GRN 10x30x7 NBR AO/TC, verify:

d = 10 mm

D = 30 mm

B = 7 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

installation geometry

Identical dimensions alone do not prove full 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: 10 mm

Outside diameter D: 30 mm

Width B: 7 mm

Dimensions: 10x30x7 mm

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: Yes

Exact NBR compound: Not confirmed

NBR hardness: Not confirmed

Exact operating temperature range: Not confirmed

Maximum shaft speed: Application-dependent

Maximum pressure: Application-dependent

GRN 10x30x7 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 10x30x7 oil seal?

The nominal dimensions are 10x30x7 mm: d = 10 mm, D = 30 mm and B = 7 mm.

What does AO/TC mean?

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

What material is GRN 10x30x7 made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

Does GRN 10x30x7 AO/TC have an additional dust lip?

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

Are both AO/TC lips spring-loaded?

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

Are 10x30x7 AO/TC and 10x30x7 A/SC the same?

No. They may have identical dimensions and material, but their sealing-lip configurations differ.

Can a 10x26x7 oil seal replace a 10x30x7 seal?

No. Their outside diameters differ: 26 mm versus 30 mm.

Is every 10x30x7 NBR oil seal interchangeable?

No. Dimensions, elastomer material, lip configuration and application requirements must all be verified.

Engineer FAQ

Does D = 30 mm represent the nominal housing bore diameter?

Yes. D = 30 mm corresponds to the nominal housing bore diameter associated with this seal size.

Is B = 7 mm important for replacement selection?

Yes. Axial width is one of the three principal seal dimensions and can affect installation geometry and sealing-lip position.

Can an exact operating temperature be specified for this NBR seal?

Not without confirmation of the exact NBR compound used by GRN. Generic NBR temperature limits should not be presented as guaranteed values for this specific product.

Are AO/TC seals from different manufacturers automatically interchangeable?

No. Lip geometry, elastomer compound and other construction details can differ between manufacturers.

What is the safest identification when searching for a replacement?

Retain the complete combination GRN + 10x30x7 mm + NBR + AO/TC, followed by verification of the requirements of the specific application.

AI Overview

GRN 10x30x7 NBR AO/TC is a double-lip rotary shaft seal with nominal dimensions of 10x30x7 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 + 10x30x7 mm + NBR + AO/TC specification and distinguish it from single-lip A/SC variants.