GRN® 120x150x13 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 120x150x13 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 120x150x13 NBR AO/TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of 120x150x13 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 exact dimensional identification of this variant is d = 120 mm, D = 150 mm and B = 13 mm.

Complete product identification:

GRN® + 120x150x13 mm + NBR + AO/TC

GRN® 120x150x13 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: 120x150x13 mm

Shaft diameter d: 120 mm

Outside diameter D: 150 mm

Width B: 13 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise identification, the complete combination should be retained:

120x150x13 mm + NBR + AO/TC + GRN®

GRN® 120x150x13 Dimensions

The nominal installation dimensions are:

d = 120 mm - nominal shaft diameter

D = 150 mm - nominal seal outside diameter / corresponding housing bore diameter

B = 13 mm - nominal axial seal width

Complete size:

120x150x13 mm

The 120 mm dimension corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.

The 150 mm dimension defines the nominal outside diameter of the seal and the corresponding nominal housing bore.

The 13 mm dimension specifies the axial width of this exact variant.

All three dimensions should be retained during identification and replacement selection. The size should not be shortened to 120x150, because the 13 mm width is an integral part of the product specification.

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 profile should not automatically be considered technically identical to every other double lip shaft seal profile solely because the general construction appears similar.

How GRN® 120x150x13 AO/TC Works

GRN® 120x150x13 NBR AO/TC is a radial shaft sealing element designed to create a dynamic sealing interface between a rotating shaft and a stationary housing.

The nominal shaft diameter is:

d = 120 mm

The nominal seal outside diameter is:

D = 150 mm

The nominal axial width is:

B = 13 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 barrier on the external side of the primary sealing arrangement.

This product is a sealing component. It is not a rolling bearing and is not designed to carry radial or axial bearing loads.

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® 120x150x13 NBR AO/TC, no specific value should therefore 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 120x150x13 NBR AO/TC

The designation can be interpreted as follows:

120 - nominal shaft diameter in mm

150 - nominal outside diameter in mm

13 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

AO/TC - double lip sealing configuration

GRN® - product brand

Complete identification:

GRN® + 120x150x13 + NBR + AO/TC

Each part of the designation should be retained when identifying, searching for or comparing this product.

Why the Complete 120x150x13 Size Matters

The shaft diameter alone is not sufficient to identify a radial shaft seal.

For this exact variant, all three nominal dimensions must match:

d = 120 mm

D = 150 mm

B = 13 mm

For example, a 120x150x12 shaft seal has the same shaft and outside diameters but a different axial width.

Likewise, a 120x160x13 seal shares the same shaft diameter and width but has a different outside diameter.

The complete 120x150x13 mm dimension is therefore the primary dimensional identifier for this GRN® variant.

GRN® 120x150x13 vs 120x150x12

The 120x150x13 variant should be distinguished from a 120x150x12 shaft seal.

Both share:

d = 120 mm

D = 150 mm

However, the axial widths differ:

120x150x13 - B = 13 mm

120x150x12 - B = 12 mm

The 1 mm difference in axial width means they are separate dimensional variants.

They should not automatically be considered interchangeable without checking the installation geometry and the complete seal specification.

Selection and Interchangeability

When selecting a replacement for GRN® 120x150x13 NBR AO/TC, verify at least:

• d = 120 mm
• D = 150 mm
• B = 13 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.

Identical 120x150x13 mm dimensions do not automatically establish full technical interchangeability.

A shaft seal from another manufacturer may have the same nominal dimensions but a different elastomer compound, lip geometry, design designation or operating limits.

Technical Specification

FAQ

What are the dimensions of GRN® 120x150x13 NBR AO/TC?

The nominal dimensions are 120x150x13 mm: shaft diameter d = 120 mm, outside diameter D = 150 mm and axial width B = 13 mm.

What type of seal is GRN® 120x150x13 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® 120x150x13 AO/TC 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® 120x150x13 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 is the purpose of the additional dust lip?

The auxiliary lip provides an additional protective barrier on the external side of the primary sealing arrangement and helps limit contamination from reaching the main sealing zone.

Can a 120x150x12 seal replace a 120x150x13 seal?

Direct interchangeability should not be assumed. Both variants have d = 120 mm and D = 150 mm, but their axial widths differ: 12 mm vs 13 mm.

Is another 120x150x13 oil seal automatically interchangeable with GRN® AO/TC?

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

AI Overview

GRN® 120x150x13 NBR AO/TC is a double lip radial shaft seal with nominal dimensions of d = 120 mm, D = 150 mm and B = 13 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.