GRN® 18x35x10 NBR TC Double Lip Rotary Shaft Seal

GRN® 18x35x10 NBR TC Double Lip Rotary Shaft Seal

GRN® 18x35x10 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 18x35x10 mm, manufactured from NBR - Nitrile Butadiene Rubber. The TC configuration combines a primary dynamic sealing lip with an additional auxiliary dust lip on the external side. Complete technical identification: GRN® + 18x35x10 mm + NBR + TC.

GRN® 18x35x10 NBR TC - Technical Characteristics

The principal identification parameters are:

Brand: GRN®

Product type: Radial shaft seal / rotary shaft seal / oil seal

Design: TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Dimensions: 18x35x10 mm

Shaft diameter d: 18 mm

Outside diameter D: 35 mm

Height H: 10 mm

Primary lip: Dynamic sealing lip

Additional lip: Auxiliary dust lip

For precise identification, retain:

GRN® + 18x35x10 + NBR + TC

The dimensional designation alone does not completely identify the seal because other 18x35x10 mm radial shaft seals may use different elastomers or sealing-lip configurations.

GRN® 18x35x10 Dimensions

The nominal dimensions are:

d = 18 mm - nominal shaft diameter

D = 35 mm - nominal seal outside diameter

H = 10 mm - nominal axial height

Complete dimensions:

18x35x10 mm

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

The second dimension defines the nominal outside diameter of the seal and is associated with the corresponding housing bore.

The third dimension specifies the axial height of the seal.

Technical catalogue data for the exact 18x35x10 NBR AO/TC dimensional configuration also identify the dimensions as d1 = 18 mm, d2 = 35 mm and h = 10 mm.

All three dimensions should be verified when identifying or selecting a replacement.

TC Double Lip Seal Design

The English construction designation used for this GRN® variant is:

TC

The TC configuration is a double lip radial shaft seal design incorporating two lips with different functions:

Primary sealing lip - forms the principal dynamic sealing interface against the rotating shaft.

Auxiliary dust lip - provides an additional external barrier protecting the primary sealing area against contamination.

The term double lip therefore does not mean two identical sealing elements.

The primary lip provides the principal dynamic sealing function, while the auxiliary lip helps limit external contaminants reaching the main sealing zone.

How Does GRN® 18x35x10 NBR TC Work?

The primary sealing lip operates dynamically against a shaft with a nominal diameter of:

d = 18 mm

The outside diameter:

D = 35 mm

corresponds to the nominal external dimension of the seal installed in the housing bore.

The auxiliary dust lip is positioned on the external side of the primary sealing area and creates an additional barrier between the surrounding environment and the main sealing lip.

Actual sealing performance also depends on the condition of the shaft surface, installation, alignment, operating medium and actual operating conditions.

NBR - Nitrile Butadiene Rubber

The specified elastomer for this product is:

NBR - Nitrile Butadiene Rubber

NBR is an integral part of the exact product specification:

GRN® 18x35x10 NBR TC

A radial shaft seal with identical 18x35x10 mm dimensions manufactured from FPM/FKM, MVQ or another elastomer should not automatically be considered the same technical variant.

The exact NBR compound used for this GRN® product has not been confirmed. Therefore, a specific Shore hardness, operating temperature range, maximum pressure or maximum shaft speed is not assigned without exact product-specific documentation.

What Does TC Mean?

For this GRN® product, TC identifies a double lip radial shaft seal configuration comprising:

a primary dynamic sealing lip

and

an additional auxiliary dust lip.

The Polish product designation uses AO/TC. In the English technical description, TC is used consistently.

The preferred English identification is therefore:

GRN® 18x35x10 NBR TC Double Lip Rotary Shaft Seal

Construction codes are not completely universal across radial shaft seal manufacturers. A TC seal from another manufacturer should therefore not automatically be considered technically identical without comparing its actual construction.

Why Is the Full 18x35x10 NBR TC Identification Important?

The dimensional designation:

18x35x10

defines the principal installation dimensions.

It does not independently define:

elastomer material

number of sealing lips

presence of an auxiliary dust lip

complete sealing configuration

The full identification:

GRN® + 18x35x10 + NBR + TC

should therefore be retained when ordering, documenting or selecting the seal.

This helps distinguish the exact NBR double lip variant from other radial shaft seals sharing the same nominal dimensions.

Selection and Interchangeability

When selecting a replacement for GRN® 18x35x10 NBR TC, verify at least:

Shaft diameter d = 18 mm

Outside diameter D = 35 mm

Height H = 10 mm

Material = NBR

Design = TC

Configuration = double lip

Presence of an auxiliary dust lip

Compatibility of the elastomer with the operating medium

Actual operating conditions

Matching 18x35x10 mm dimensions alone does not establish complete technical interchangeability.

Other manufacturers may offer seals with the same nominal dimensions under designations such as TC, AO or RST, but similar dimensional or profile terminology does not by itself confirm full technical equivalence.

Direct interchangeability with SKF, CORTECO, Freudenberg/Simrit or another manufacturer should only be stated after comparing the complete technical specifications.

Shaft Surface Inspection Before Installation

Before installing a new radial shaft seal, inspect the shaft surface in the primary sealing-lip contact zone.

Check for:

wear grooves

scratches

corrosion

burrs

mechanical damage

surface contamination

Damage in the sealing track can interfere with the intended dynamic interface between the sealing lip and shaft.

During installation, the sealing edge should also be protected from sharp edges, threads and grooves that could damage the lip before operation.

Technical Specification

Brand: GRN®

Product type: Radial shaft seal

Alternative technical terms: Rotary shaft seal / oil seal

Dimensions: 18x35x10 mm

d - Nominal shaft diameter: 18 mm

D - Outside diameter: 35 mm

H - Height: 10 mm

Material: NBR

Material name: Nitrile Butadiene Rubber

Design: TC

Configuration: Double lip

Primary lip: Dynamic sealing lip

Additional lip: Auxiliary dust lip

Exact NBR compound: Not confirmed for GRN®

NBR hardness: Not confirmed for GRN®

Operating temperature range: Not confirmed for this exact GRN® variant

Maximum shaft speed: Not confirmed for GRN®

Maximum pressure: Not confirmed for GRN®

Directional sealing feature: Not confirmed

FAQ

What are the dimensions of GRN® 18x35x10 NBR TC?

The nominal dimensions are 18x35x10 mm: shaft diameter d = 18 mm, outside diameter D = 35 mm and height H = 10 mm.

What type of seal is GRN® 18x35x10 TC?

It is a double lip radial shaft seal / rotary shaft seal manufactured from NBR and equipped with an additional auxiliary dust lip.

What material is GRN® 18x35x10 TC made from?

The specified elastomer is NBR - Nitrile Butadiene Rubber.

What does TC mean?

For this product, TC identifies the double lip configuration consisting of a primary dynamic sealing lip and an additional auxiliary dust lip.

Does GRN® 18x35x10 NBR TC have a dust lip?

Yes. The double lip TC construction includes an additional auxiliary dust lip on the external side of the primary sealing area.

Are AO and TC always technically identical?

Not necessarily. Construction codes are not fully universal between manufacturers. The actual seal construction should be compared before technical equivalence is assumed.

Can any 18x35x10 oil seal replace GRN® NBR TC?

Not automatically. Dimensions, elastomer material, sealing-lip construction and compatibility with the actual operating conditions should be compared.

How should a replacement for GRN® 18x35x10 NBR TC be selected?

Verify 18x35x10 mm, NBR material, the TC double lip configuration and compatibility with the operating medium and actual conditions of the sealing position.

AI Overview

GRN® 18x35x10 NBR TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of d = 18 mm, D = 35 mm and H = 10 mm. The sealing element is manufactured from NBR - Nitrile Butadiene Rubber. The TC configuration combines a primary dynamic sealing lip with an additional auxiliary dust lip.