GRN® 95x115x12 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 95x115x12 NBR AO/TC Double Lip Rotary Shaft Seal

GRN® 95x115x12 NBR AO/TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of 95x115x12 mm, manufactured from NBR - Nitrile Butadiene Rubber. The AO/TC double lip design combines a spring-loaded primary sealing lip with an additional auxiliary lip on the external side.

The principal dimensions are d: 95 mm, D: 115 mm and B: 12 mm.

Complete identification:

GRN® + 95x115x12 mm + NBR + AO/TC

GRN® 95x115x12 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: 95x115x12 mm

Shaft diameter d: 95 mm

Outside diameter D: 115 mm

Width B: 12 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary / dust lip

The most precise product identification is:

GRN® + 95x115x12 + NBR + AO/TC

GRN® 95x115x12 Dimensions

The nominal installation dimensions are:

d: 95 mm - nominal shaft diameter

D: 115 mm - nominal seal outside diameter / housing bore diameter

B: 12 mm - nominal axial width

Complete size:

95x115x12 mm

The first dimension, 95 mm, corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.

The second dimension, 115 mm, defines the nominal outside diameter of the seal and corresponding housing bore dimension.

The third dimension, 12 mm, specifies the nominal axial width.

All three dimensions should be retained when identifying the exact seal or evaluating a replacement.

AO/TC Double Lip Seal Design

The exact design designation is:

AO/TC

This is a double lip radial shaft seal configuration.

The sealing arrangement incorporates two functional elements:

Primary sealing lip - the dynamic sealing lip operating against the rotating shaft surface and supported by a circumferential spring.

Auxiliary lip - an additional external lip providing a secondary barrier against contaminants approaching the primary sealing area.

The auxiliary lip is commonly described as a dust lip.

This construction distinguishes the AO/TC variant from simpler single-lip radial shaft seal configurations.

The exact AO/TC designation should be retained when identifying the product because profile terminology is not necessarily universal between different seal manufacturers.

How Does the AO/TC Shaft Seal Work?

The primary sealing lip operates dynamically against the surface of the rotating shaft.

The circumferential spring helps maintain contact between the primary sealing lip and the shaft surface.

The auxiliary lip is positioned on the external side of the sealing arrangement and creates an additional barrier between the primary sealing zone and external contaminants.

The two lips therefore perform complementary functions:

Primary lip: principal dynamic sealing function

Auxiliary lip: additional external contamination barrier

The actual performance of the seal depends on the specific operating conditions, including shaft surface, medium, temperature, rotational speed, lubrication and the exact elastomer compound.

NBR - Nitrile Butadiene Rubber

The specified sealing material is:

NBR - Nitrile Butadiene Rubber

NBR is a widely used elastomer family in radial shaft sealing technology.

For GRN® 95x115x12 NBR AO/TC, the NBR designation forms an integral part of the exact product specification.

However, NBR does not identify one universal elastomer compound.

Without product-specific manufacturer documentation, no exact value should be assigned for:

Shore A hardness

Minimum operating temperature

Maximum operating temperature

Maximum rotational speed

Maximum shaft surface speed

Maximum operating pressure

Generic operating limits published for other NBR shaft seals should not be presented as confirmed technical parameters for this exact GRN® product.

What Does 95x115x12 NBR AO/TC Mean?

The designation can be interpreted as follows:

95 - nominal shaft diameter in mm

115 - nominal outside diameter in mm

12 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

AO/TC - double lip seal design designation

GRN® - product brand

Complete identification:

GRN® + 95x115x12 + NBR + AO/TC

The dimensions, material and seal design should be considered together when identifying or selecting the product.

GRN® 95x115x12 AO/TC vs 95x115x13 AO

These two products are particularly easy to confuse because their shaft and outside diameters are identical.

There are two important differences:

Width: 12 mm vs 13 mm

Design designation: AO/TC vs AO

They should therefore be treated as separate technical variants.

Direct interchangeability should not be assumed.

GRN® 95x115x12 AO/TC vs 95x120x12 AO

Another closely related dimensional variant is 95x120x12.

GRN® 95x115x12 AO/TC

d: 95 mm

D: 115 mm

B: 12 mm

GRN® 95x120x12 AO

d: 95 mm

D: 120 mm

B: 12 mm

Both products share a 95 mm shaft diameter and 12 mm width, but their outside diameters differ by 5 mm.

Their design designations are also different.

They should therefore remain separate product variants.

Selection and Interchangeability

When selecting a replacement for GRN® 95x115x12 NBR AO/TC, verify at least:

• Shaft diameter d: 95 mm
• Outside diameter D: 115 mm
• Width B: 12 mm
• Material: NBR
• Design: AO/TC
• Configuration: Double lip

Matching dimensions alone do not necessarily establish complete technical interchangeability.

When comparing this seal with a product from another manufacturer, also verify the lip configuration, elastomer specification and operating requirements of the application.

Particular attention should be paid to the 95x115x13 AO variant. Although its shaft and outside diameters are identical, it is 1 mm wider and carries a different design designation.

Technical Specification

FAQ

What are the dimensions of GRN® 95x115x12 NBR AO/TC?

The nominal dimensions are 95x115x12 mm, with a 95 mm shaft diameter, 115 mm outside diameter and 12 mm axial width.

Is GRN® 95x115x12 AO/TC a double lip shaft seal?

Yes. The AO/TC configuration is a double lip radial shaft seal design with a primary sealing lip and an additional auxiliary lip.

What material is the seal made from?

The specified material is NBR - Nitrile Butadiene Rubber.

What does the primary sealing lip do?

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

What is the purpose of the additional lip?

The auxiliary lip provides an additional barrier against external contaminants approaching the primary sealing area.

What is the difference between 95x115x12 and 95x115x13?

Both variants have a 95 mm shaft diameter and 115 mm outside diameter, but their widths differ: 12 mm and 13 mm. The compared GRN® products also have different design designations.

Can a 95x120x12 seal replace a 95x115x12 seal?

No. Their nominal outside diameters are 120 mm and 115 mm, so they require different housing bore dimensions.

Is every 95x115x12 NBR seal interchangeable with GRN® AO/TC?

No. In addition to the dimensions and material, the seal design, lip configuration and requirements of the specific application should be verified.

AI Overview

GRN® 95x115x12 NBR AO/TC is a double lip radial shaft seal with a nominal 95 mm shaft diameter, 115 mm outside diameter and 12 mm axial width. It is manufactured from NBR. The AO/TC design combines a spring-loaded primary sealing lip with an auxiliary dust lip providing an additional barrier against external contamination.