GRN® 102x125x13 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 102x125x13 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 102x125x13 NBR AO/TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of 102x125x13 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.

A particularly important identification feature of this variant is its d = 102 mm shaft diameter, which should not be rounded or confused with 100 mm or 105 mm shaft seal variants.

Complete product identification:

GRN® + 102x125x13 mm + NBR + AO/TC

GRN® 102x125x13 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: 102x125x13 mm

Shaft diameter d: 102 mm

Outside diameter D: 125 mm

Width B: 13 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise technical identification, the complete combination should be retained:

102x125x13 mm + NBR + AO/TC + GRN®

GRN® 102x125x13 Dimensions

The nominal installation dimensions are:

d = 102 mm - nominal shaft diameter

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

B = 13 mm - nominal axial seal width

Complete size:

102x125x13 mm

The 102 mm dimension corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.

The 125 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. The size should not be shortened to 102x125, because the 13 mm width is an integral part of the dimensional 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 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 is similar.

How GRN® 102x125x13 AO/TC Works

GRN® 102x125x13 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 = 102 mm

The nominal seal outside diameter is:

D = 125 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® 102x125x13 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 102x125x13 NBR AO/TC

The designation can be interpreted as follows:

102 - nominal shaft diameter in mm

125 - 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® + 102x125x13 + NBR + AO/TC

Each part of this designation is relevant when identifying, searching for or comparing the product.

Why the Exact 102x125x13 Size Matters

The 102 mm shaft diameter is an important distinguishing feature of this product.

It should not be rounded or simplified when identifying a replacement:

d = 102 mm is not d = 100 mm

and

d = 102 mm is not d = 105 mm

A shaft seal with a nominal 100 mm or 105 mm inside diameter is a different dimensional variant, even when its outside diameter or width is similar.

The same principle applies to:

D = 125 mm

and

B = 13 mm

The complete 102x125x13 mm dimension should therefore be retained in technical documentation, product searches and replacement selection.

GRN® 102x125x13 vs 100x125x13

A 102x125x13 shaft seal should not be confused with a 100x125x13 variant.

The key difference is the nominal shaft diameter:

102x125x13: d = 102 mm

100x125x13: d = 100 mm

The difference is 2 mm in nominal shaft diameter.

Even if both variants share D = 125 mm and B = 13 mm, they are different dimensional products and should not be treated as direct substitutes.

This distinction is particularly important for technical product identification and also helps prevent search cannibalization between similar GRN® product pages.

Selection and Interchangeability

When selecting a replacement for GRN® 102x125x13 NBR AO/TC, verify at least:

• d = 102 mm
• D = 125 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 102x125x13 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® 102x125x13 NBR AO/TC?

The nominal dimensions are 102x125x13 mm: shaft diameter d = 102 mm, outside diameter D = 125 mm and axial width B = 13 mm.

What type of seal is GRN® 102x125x13 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® 102x125x13 AO/TC made from?

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

Does GRN® 102x125x13 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 100x125x13 seal replace a 102x125x13 seal?

No direct interchangeability should be assumed. Their nominal shaft diameters differ by 2 mm: one is designed for d = 100 mm, while this GRN® variant has d = 102 mm.

Is another 102x125x13 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® 102x125x13 NBR AO/TC is a double lip radial shaft seal with nominal dimensions of d = 102 mm, D = 125 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.