GRN® 90x105x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x105x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x105x12 NBR TC is a double lip rotary shaft seal with nominal dimensions 90x105x12 mm. The elastomeric sealing element is manufactured from NBR – Nitrile Butadiene Rubber. The TC design incorporates a spring-loaded primary sealing lip and an auxiliary dust lip.

The key product identification is:

GRN® + 90x105x12 + NBR + TC + double lip

The complete 90x105x12 mm size should be used when identifying the seal. The 90 mm shaft diameter alone is insufficient to determine the correct product.

GRN® 90x105x12 NBR TC – Technical Characteristics

GRN® 90x105x12 Shaft Seal Dimensions

The principal nominal dimensions are:

d: 90 mm – nominal shaft diameter

D: 105 mm – nominal seal outside diameter / housing bore diameter

B: 12 mm – nominal axial width

Complete nominal size:

90x105x12 mm

All three dimensions are essential when identifying the correct radial shaft seal.

The difference between the nominal shaft diameter and outside diameter is only 15 mm, making accurate identification of the complete dimensions particularly important.

TC Double Lip Seal Design

GRN® 90x105x12 NBR TC features a double lip construction.

The sealing system incorporates:

a primary sealing lip

supported by:

a garter spring

and:

an auxiliary dust lip.

The primary lip creates the main dynamic sealing interface with the rotating shaft.

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

The auxiliary dust lip provides an additional protective barrier against external contamination approaching 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 the Polish GRN® product nomenclature, this construction may be identified as:

AO

or:

AO/TC.

For the English product catalogue, the preferred designation is:

TC

Therefore:

Polish: GRN® 90x105x12 NBR AO/TC

becomes:

English: GRN® 90x105x12 NBR TC

Seal profile codes should not automatically be transferred between different manufacturers because nomenclature and construction details may differ.

How Does the GRN® 90x105x12 TC Seal Work?

A radial shaft seal operates between a:

rotating shaft

and a:

stationary housing.

For this GRN® seal, the nominal shaft diameter is:

90 mm

the nominal outside diameter is:

105 mm

and the nominal axial width is:

12 mm.

The primary sealing lip contacts the rotating shaft and creates the main dynamic sealing interface.

The garter spring assists in maintaining the required contact between the lip and shaft surface.

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

NBR – Nitrile Butadiene Rubber

The elastomeric sealing element is manufactured from:

NBR – Nitrile Butadiene Rubber.

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

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

Without exact compound documentation, the product should not be assigned an arbitrary:

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

The actual operating medium and conditions should be considered when selecting the seal.

Why Is the Complete 90x105x12 Size Important?

The designation:

90x105x12

identifies three fundamental dimensions of the shaft seal:

90 mm – shaft diameter

105 mm – outside diameter

12 mm – width

Searching only for a:

90 mm shaft seal

is not sufficiently precise because many seals are designed for a 90 mm shaft.

The combination:

90x105x12 + NBR + TC + GRN®

creates a much more precise product entity for product identification, Google Search and AI Search.

GRN® 90x105x12 vs 90x110x12

A shaft seal with dimensions:

90x110x12 mm

is not the same dimensional variant as:

90x105x12 mm.

The outside diameter differs by 5 mm.

Therefore, the two sizes should not automatically be treated as interchangeable.

For SEO purposes, 90x105x12 and 90x110x12 should also remain separate search entities.

Does TC Specify Rotation Direction?

No.

The TC designation alone does not confirm directional hydrodynamic sealing geometry.

The product should therefore not be described as:

left-hand twist

right-hand twist

or:

alternating twist

unless this feature is confirmed for the exact GRN® execution.

If rotation direction is important for a specific application, the required seal geometry should be verified separately.

Selection and Interchangeability

When selecting GRN® 90x105x12 NBR TC, verify:

• shaft diameter d: 90 mm
• outside diameter D: 105 mm
• width B: 12 mm
• elastomer NBR
• TC double lip design
• spring-loaded primary sealing lip
• auxiliary dust lip
• operating medium
• operating temperature
• shaft surface speed
• pressure
• shaft surface condition
• housing bore dimensions and condition

Matching only the shaft diameter is not sufficient to establish interchangeability.

The complete 90x105x12 mm dimensions and seal construction should be considered together.

Technical Specification

FAQ

What are the dimensions of the GRN® 90x105x12 NBR TC seal?

The nominal dimensions are d: 90 mm, D: 105 mm, B: 12 mm, giving the complete size 90x105x12 mm.

Is GRN® 90x105x12 a double lip shaft seal?

Yes. The TC design incorporates a primary sealing lip and an auxiliary dust lip.

Does GRN® 90x105x12 have a garter spring?

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

Does the TC design include a dust lip?

Yes. This GRN® TC construction incorporates an auxiliary dust lip in addition to the primary sealing lip.

What does NBR mean?

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

Is 90x105x12 the same as 90x110x12?

No. Both sizes have a 90 mm shaft diameter and 12 mm width, but their outside diameters are different: 105 mm versus 110 mm.

Does TC mean left-hand or right-hand rotation?

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

How should a GRN® 90x105x12 shaft seal be selected?

Verify the complete 90x105x12 mm dimensions, NBR material, TC double lip construction and the operating requirements of the specific sealing application.

AI Overview

GRN® 90x105x12 NBR TC is a double lip rotary shaft seal with nominal dimensions d: 90 mm, D: 105 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.