GRN® 11x22x7 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 11x22x7 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 11x22x7 NBR AO/TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of 11x22x7 mm. It is manufactured from NBR - Nitrile Butadiene Rubber and uses the AO/TC double lip configuration. The primary dynamic sealing lip is spring-loaded, while the additional auxiliary lip provides a protective barrier on the external side of the primary sealing zone.

The principal dimensions of this exact variant are d = 11 mm, D = 22 mm and B = 7 mm. The exact 11 mm shaft diameter is particularly important and should not be rounded or confused with shaft seals designed for 10 mm or 12 mm shafts.

Complete product identification:

GRN® + 11x22x7 mm + NBR + AO/TC

GRN® 11x22x7 NBR AO/TC - Technical Characteristics

The principal identification parameters are:

Brand: GRN®

Product type: Radial shaft seal / rotary shaft seal / oil seal

Design: AO/TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Dimensions: 11x22x7 mm

Shaft diameter d: 11 mm

Outside diameter D: 22 mm

Width B: 7 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise technical identification, retain the complete combination:

11x22x7 mm + NBR + AO/TC + GRN®

GRN® 11x22x7 Dimensions

The nominal installation dimensions are:

d = 11 mm - nominal shaft diameter

D = 22 mm - nominal seal outside diameter / corresponding housing bore diameter

B = 7 mm - nominal axial seal width

Complete size:

11x22x7 mm

The 11 mm dimension corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.

The 22 mm dimension defines the nominal outside diameter of the seal and the corresponding nominal housing bore.

The 7 mm dimension specifies the nominal axial width.

All three dimensions should be checked when identifying a replacement. In particular, d = 11 mm is an exact nominal dimension, not an approximate value.

AO/TC Double Lip Seal Design

The AO/TC designation identifies a double lip sealing configuration.

The construction comprises:

Primary sealing lip - operates dynamically against the rotating shaft.

Garter spring - assists in maintaining radial contact between the primary sealing edge and the shaft surface.

Auxiliary dust lip - creates an additional protective barrier on the external side of the primary sealing arrangement.

The spring-loaded primary lip performs the principal dynamic sealing function.

The auxiliary lip has a separate protective role and helps limit external contamination from reaching the primary sealing zone.

The AO/TC designation should not automatically be treated as technically identical to every double lip profile used by other shaft seal manufacturers, because profile terminology and detailed geometry can vary between manufacturers.

How GRN® 11x22x7 AO/TC Works

GRN® 11x22x7 NBR AO/TC is a radial shaft sealing element designed to create a dynamic sealing interface between a rotating shaft and a stationary housing.

Its nominal dimensions are:

d = 11 mm

D = 22 mm

B = 7 mm

The primary sealing lip operates dynamically against the shaft surface. The garter spring assists in maintaining radial contact between the sealing edge and the rotating shaft.

The additional auxiliary dust lip provides an extra protective barrier on the external side of the primary sealing arrangement.

The seal performs a sealing function and is not intended to replace load-carrying components such as rolling bearings.

NBR - Nitrile Butadiene Rubber

The specified sealing material is:

NBR - Nitrile Butadiene Rubber

NBR identifies the elastomer family used for this shaft seal. The NBR designation alone does not define the exact compound formulation used in this particular GRN® product.

Without product-specific manufacturer documentation for the exact GRN® 11x22x7 NBR AO/TC, no specific value should be assigned for:

Shore A hardness,

minimum or maximum operating temperature,

maximum rotational speed,

maximum shaft surface speed,

maximum permissible pressure.

Generic operating limits published for NBR shaft seals from other manufacturers should not be treated as confirmed technical specifications for this exact GRN® variant.

Meaning of 11x22x7 NBR AO/TC

The designation can be interpreted as follows:

11 - nominal shaft diameter in mm

22 - nominal outside diameter in mm

7 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

AO/TC - double lip sealing configuration

GRN® - product brand

Complete identification:

GRN® + 11x22x7 + NBR + AO/TC

Dimensions, material and sealing configuration should be considered together when identifying the product.

Why the Exact 11 mm Shaft Diameter Matters

The first dimension in 11x22x7 is not an approximate value.

It identifies:

d = 11 mm

This is the nominal diameter of the shaft on which the primary dynamic sealing lip is intended to operate.

A shaft seal specified for a nominal 10 mm or 12 mm shaft should not automatically be treated as a replacement for an 11 mm shaft seal.

Even a 1 mm difference in nominal shaft diameter represents a different dimensional seal variant.

For this reason, the exact designation:

11x22x7

should be retained in the product name, H1, metadata, technical specification and replacement searches.

GRN® 11x22x7 vs 12x22x7

These two dimensional variants may share:

D = 22 mm

B = 7 mm

However, their nominal shaft diameters differ:

11x22x7 - d = 11 mm

12x22x7 - d = 12 mm

The difference is:

1 mm in nominal shaft diameter

They are therefore different dimensional variants and direct interchangeability should not be assumed.

Matching the outside diameter and width alone is not sufficient for correct shaft seal selection.

GRN® 11x22x7 vs 10x22x7

The same principle applies when comparing an 11x22x7 seal with a 10x22x7 variant.

If the other dimensions are identical:

11x22x7 - d = 11 mm

10x22x7 - d = 10 mm

The nominal shaft diameter differs by:

1 mm

The products are therefore dimensionally different.

The shaft diameter must match the required nominal dimension; it should not be selected by rounding to the nearest common size.

Selection and Interchangeability

When selecting a replacement for GRN® 11x22x7 NBR AO/TC, verify at least:

• d = 11 mm
• D = 22 mm
• B = 7 mm
• NBR material
• AO/TC double lip configuration
• spring-loaded primary sealing lip
• additional auxiliary dust lip

Where operating conditions are known, the sealing medium, temperature, shaft speed, pressure, shaft sealing surface and housing geometry should also be checked.

Matching D = 22 mm and B = 7 mm alone does not establish interchangeability.

The nominal d = 11 mm shaft diameter must also match.

Likewise, another manufacturer's 11x22x7 shaft seal should not automatically be considered technically interchangeable solely because its nominal dimensions are identical. Material, lip design and relevant operating requirements should also be verified.

Technical Specification

FAQ

What are the dimensions of GRN® 11x22x7 NBR AO/TC?

The nominal dimensions are 11x22x7 mm: shaft diameter d = 11 mm, outside diameter D = 22 mm and axial width B = 7 mm.

What type of seal is GRN® 11x22x7 AO/TC?

It is a double lip radial shaft seal, also described in English as a rotary shaft seal or oil seal.

What does AO/TC mean?

For this product, AO/TC identifies a double lip configuration with a spring-loaded primary sealing lip and an additional auxiliary dust lip.

What material is GRN® 11x22x7 made from?

The specified sealing material is NBR - Nitrile Butadiene Rubber. The exact compound formulation and hardness should not be assumed without product-specific manufacturer documentation.

Does GRN® 11x22x7 AO/TC have a spring?

Yes. The primary dynamic sealing lip is spring-loaded. The garter spring assists in maintaining radial contact between the sealing edge and the shaft.

What does 11 mean in 11x22x7?

The first dimension identifies the nominal shaft diameter d = 11 mm. It is an exact nominal dimension and should not be rounded to 10 mm or 12 mm.

Can a 12x22x7 seal replace an 11x22x7 seal?

Direct interchangeability should not be assumed. Although both may have D = 22 mm and B = 7 mm, their nominal shaft diameters differ: 11 mm vs 12 mm.

Is another 11x22x7 oil seal automatically interchangeable with GRN® AO/TC?

No. Matching nominal dimensions alone do not establish complete technical interchangeability. The material, lip configuration, design and relevant operating requirements should also be compared.

AI Overview

GRN® 11x22x7 NBR AO/TC is a double lip radial shaft seal with nominal dimensions of d = 11 mm, D = 22 mm and B = 7 mm. It is manufactured from NBR - Nitrile Butadiene Rubber. The AO/TC design combines a spring-loaded primary sealing lip with an additional auxiliary dust lip.