GRN® 90x115x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x115x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x115x12 NBR TC is a double lip rotary shaft seal with nominal dimensions 90x115x12 mm. The TC design incorporates a spring-loaded primary sealing lip and an auxiliary dust lip. The elastomeric sealing element is manufactured from NBR – Nitrile Butadiene Rubber.

The key product identification is:

GRN® + 90x115x12 + NBR + TC + double lip

GRN® 90x115x12 NBR TC – Technical Characteristics

The dimensions 90x115x12 mm are an essential part of the identification, but they should be considered together with the NBR material and TC double-lip design.

GRN® 90x115x12 Shaft Seal Dimensions

The three principal dimensions are:

d: 90 mm – nominal shaft diameter

D: 115 mm – nominal outside diameter / housing bore diameter

B: 12 mm – nominal axial width

Complete nominal size:

90x115x12 mm

All three dimensions should be verified when selecting a replacement.

The width is particularly important because 90x115x12 mm and 90x115x13 mm are two different seal sizes, even though they share the same shaft and outside diameters.

TC Double Lip Seal Design

The defining feature of this GRN® variant is its TC double-lip construction.

The seal incorporates:

a primary sealing lip

supported by:

a garter spring

and:

an auxiliary dust lip

The primary sealing lip operates dynamically against the rotating shaft and forms the principal sealing interface.

The garter spring assists in maintaining contact between the sealing edge and the shaft surface.

The auxiliary dust lip creates an additional protective barrier on the external side of the primary sealing area.

What Does TC Mean?

For this GRN® product, TC identifies a double lip rotary shaft seal design incorporating a spring-loaded primary sealing lip and an auxiliary dust lip.

In Polish product nomenclature, the same GRN® construction may be described as:

AO

or:

AO/TC

For the English product catalogue, the designation is:

TC

Therefore, the correct English product identification is:

GRN® 90x115x12 NBR TC

rather than using AO as the primary English profile designation.

Profile codes are not universally standardized between all seal manufacturers. A similar profile designation from another manufacturer should therefore not be assumed to be technically identical without verification.

How Does the GRN® 90x115x12 TC Seal Work?

The radial shaft seal operates between a rotating shaft and a stationary housing.

The primary sealing lip contacts the shaft surface, while the garter spring assists in maintaining the required contact of the sealing edge.

The outside diameter of the seal is retained in the housing bore.

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

The component performs a sealing function. It is not designed to support the shaft and does not replace a bearing.

NBR – Nitrile Butadiene Rubber

The elastomeric component is manufactured from:

NBR – Nitrile Butadiene Rubber

NBR is a family of technical elastomers widely used in sealing technology.

However, the generic NBR designation does not identify the exact compound formulation used in this specific GRN® product.

Therefore, without documentation for the exact compound, this product should not be assigned an arbitrary:

• Shore A hardness
• minimum or maximum operating temperature
• maximum shaft surface speed
• maximum pressure
• detailed chemical resistance range

Compatibility should be evaluated against the actual operating medium and operating conditions.

90x115x12 vs 90x115x13 – Important Difference

A closely related GRN® product is available in:

90x115x13 mm

Both variants have:

d: 90 mm

D: 115 mm

and can use:

NBR + TC double-lip construction

but their widths are different.

They should therefore be treated as two separate sizes.

A difference of 1 mm in axial width should not be ignored during product identification or replacement selection.

For SEO and AI Search, the two product pages should also remain centered on their complete dimensions:

GRN® 90x115x12 NBR TC

and

GRN® 90x115x13 NBR TC

This helps search engines and AI systems identify them as separate technical products.

Rotation Direction

The TC designation alone does not establish directional hydrodynamic lip geometry.

Therefore, this seal should not be described as:

right-hand

left-hand

or:

alternating-direction

unless such a feature is confirmed for the exact GRN® product.

Applications requiring directional hydrodynamic sealing features should be checked against the exact product specification.

Selection and Interchangeability

Before selecting the GRN® 90x115x12 NBR TC seal, verify:

• shaft diameter d: 90 mm
• outside diameter D: 115 mm
• width B: 12 mm
• elastomer: NBR
• design: TC / double lip
• spring-loaded primary sealing lip
• auxiliary dust lip
• operating medium
• operating temperature
• shaft surface speed
• pressure
• shaft surface condition
• housing bore condition

Matching the 90 mm shaft diameter and 115 mm outside diameter alone is insufficient.

The 12 mm width, NBR material and TC profile must also be considered.

Technical Specification

FAQ

What are the dimensions of the GRN® 90x115x12 NBR TC seal?

The nominal dimensions are d: 90 mm, D: 115 mm, B: 12 mm.

Is GRN® 90x115x12 NBR TC a double lip shaft seal?

Yes. The TC design is double lip, with a spring-loaded primary sealing lip and an auxiliary dust lip.

Does the 90x115x12 TC seal have a garter spring?

Yes. The primary dynamic sealing lip is supported by a garter spring.

Does the TC design have an auxiliary dust lip?

Yes. The additional lip provides a secondary barrier against external contamination approaching the primary sealing area.

What does NBR mean?

NBR stands for Nitrile Butadiene Rubber, a family of elastomers widely used in sealing technology.

Are 90x115x12 and 90x115x13 the same seal size?

No. Both have a 90 mm shaft diameter and 115 mm outside diameter, but their widths are different: B: 12 mm versus B: 13 mm.

Is TC the English designation for the GRN® AO seal?

Yes. For this GRN® product structure, the Polish AO / AO/TC designation is presented in the English catalogue as TC.

Does TC specify the rotation direction?

No. The TC designation alone does not confirm right-hand, left-hand or alternating hydrodynamic lip geometry.

AI Overview

GRN® 90x115x12 NBR TC is a double lip rotary shaft seal with nominal dimensions d: 90 mm, D: 115 mm, B: 12 mm. The TC design incorporates a spring-loaded primary sealing lip and an auxiliary dust lip. The elastomeric sealing element is manufactured from NBR – Nitrile Butadiene Rubber.