GRN® 34x48x8 NBR TC Double Lip Rotary Shaft Seal

GRN® 34x48x8 NBR TC Double Lip Rotary Shaft Seal

GRN® 34x48x8 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 34x48x8 mm, manufactured from NBR - Nitrile Butadiene Rubber. The TC double lip design incorporates a primary dynamic sealing lip and an additional auxiliary dust lip.

Complete technical identification:

GRN® + 34x48x8 mm + NBR + TC

GRN® 34x48x8 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: 34x48x8 mm

Shaft diameter d: 34 mm

Outside diameter D: 48 mm

Height H: 8 mm

Primary lip: Dynamic sealing lip

Additional lip: Auxiliary dust lip

The essential product identification is:

GRN® + 34x48x8 + NBR + TC

The nominal dimensions alone do not completely identify this seal because other 34x48x8 products may use different elastomers or sealing profiles.

GRN® 34x48x8 Dimensions

The nominal installation dimensions are:

d = 34 mm - nominal shaft diameter

D = 48 mm - nominal seal outside diameter / housing bore diameter

H = 8 mm - nominal axial height

Complete dimensions:

34x48x8 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 installed in the housing.

The third dimension specifies its nominal axial height.

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

NBR - Nitrile Butadiene Rubber

The sealing material is:

NBR - Nitrile Butadiene Rubber

Material is an integral part of the complete specification:

GRN® + 34x48x8 + NBR + TC

A 34x48x8 shaft seal manufactured from FPM, MVQ or another elastomer is not the same material variant.

The exact NBR compound used for this GRN® product has not been confirmed in available product-specific documentation. Therefore, a fixed Shore hardness, temperature range or chemical compatibility should not be assigned solely from generic NBR data.

TC Double Lip Seal Construction

The English design designation used for this GRN® product is:

TC

The TC configuration incorporates:

Primary sealing lip - the dynamic sealing element operating against the rotating shaft.

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

The auxiliary lip should not be interpreted as a second identical oil-retaining lip. The primary and auxiliary lips perform different functions.

The product can therefore be technically described as a:

TC Double Lip Radial Shaft Seal

TC Double Lip Rotary Shaft Seal

TC Double Lip Oil Seal

How Does the GRN® 34x48x8 TC Seal Work?

During operation, the shaft rotates relative to the stationary seal.

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

34 mm

The outside surface of the seal is installed in a housing with a nominal bore corresponding to:

48 mm

The auxiliary dust lip provides an additional barrier between the external environment and the primary dynamic sealing zone.

The nominal axial height is:

8 mm

Correct operation also depends on the condition of the shaft surface, installation quality and the operating conditions of the actual application.

Primary Sealing Lip and Auxiliary Dust Lip

The two lips have different functions.

The:

primary sealing lip

forms the principal dynamic sealing interface with the rotating shaft.

The:

auxiliary dust lip

provides additional protection against external contaminants.

This distinction is important when identifying the product as a:

double lip oil seal

The term double lip does not mean that the product has two identical dynamic oil-retaining lips.

TC vs Single Lip Shaft Seal

A TC double lip seal incorporates:

one primary dynamic sealing lip

and:

one auxiliary dust lip

A single lip shaft seal may not include the additional dust lip.

Therefore, two seals with identical:

34x48x8 mm

dimensions can have different sealing configurations.

The lip design must be considered together with dimensions and material when selecting a replacement.

TC vs AO/TC Designation

The Polish product designation may use:

AO/TC

For the English version, the design is identified as:

TC

Different manufacturers may use different profile nomenclature for similar rotary shaft seal constructions.

Therefore, TC, AO/TC or another manufacturer's suffix should not automatically be considered universally equivalent without comparing the actual construction.

For this English GRN® product description, the preferred identification is:

GRN® 34x48x8 NBR TC

What Does GRN® 34x48x8 NBR TC Mean?

The complete designation identifies:

GRN® - brand

34 mm - nominal shaft diameter

48 mm - nominal outside diameter

8 mm - nominal axial height

NBR - Nitrile Butadiene Rubber

TC - double lip sealing configuration

The complete technical identification is:

GRN® + 34x48x8 + NBR + TC

This provides more precise identification than searching only for:

34x48x8 oil seal

GRN® 34x48x8 vs Other 34x48x8 Shaft Seals

The dimensions:

34x48x8 mm

are not unique to this GRN® product.

Other shaft seals may share the same three nominal dimensions while differing in:

elastomer material

lip configuration

external sealing design

manufacturer profile

application-specific characteristics

Therefore, dimensional matching alone is insufficient.

For this product, retain:

GRN® + 34x48x8 + NBR + TC

Selection and Interchangeability

When selecting a replacement for GRN® 34x48x8 NBR TC, verify at least:

d = 34 mm

D = 48 mm

H = 8 mm

NBR material

TC double lip configuration

presence of the auxiliary dust lip

primary sealing-lip geometry

shaft surface condition

housing bore dimensions

operating medium

operating temperature

shaft speed

pressure conditions, where applicable

Matching only the:

34x48x8 mm

dimensions does not establish complete technical interchangeability.

Material and sealing construction must also be considered.

Shaft Inspection Before Installation

Before installing a new rotary shaft seal, inspect the shaft surface in the area contacted by the primary sealing lip.

Check particularly for:

wear grooves

scratches

corrosion

mechanical damage

sharp edges

contamination

A damaged or heavily worn shaft surface may affect sealing performance even when the replacement seal has the correct nominal dimensions.

The housing bore and installation surfaces should also be clean and free from damage.

Technical Specification

Brand: GRN®

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

Dimensions: 34x48x8 mm

Shaft diameter d: 34 mm

Outside diameter D: 48 mm

Height H: 8 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

Hardness: Not confirmed

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

Maximum shaft speed: Not confirmed

Maximum pressure: Not confirmed

Hydrodynamic direction: Not confirmed

FAQ

What are the dimensions of the GRN® 34x48x8 TC seal?

The nominal dimensions are 34x48x8 mm: d = 34 mm, D = 48 mm and H = 8 mm.

What material is GRN® 34x48x8 TC made from?

The seal is manufactured from NBR - Nitrile Butadiene Rubber.

What does TC mean on this GRN® oil seal?

For this product, TC identifies a double lip configuration with a primary dynamic sealing lip and an auxiliary dust lip.

Is GRN® 34x48x8 TC a double lip oil seal?

Yes. It is a double lip rotary shaft seal / oil seal with a primary sealing lip and an additional auxiliary dust lip.

What shaft diameter is the 34x48x8 seal designed for?

The nominal shaft diameter is 34 mm. Its outside diameter is 48 mm and nominal height is 8 mm.

Are all 34x48x8 oil seals identical?

No. Products with the same dimensions may differ in elastomer material, sealing profile and other construction characteristics.

Can a single lip 34x48x8 seal replace this TC seal?

This should not be assumed. The required lip configuration, material and operating conditions should be verified before substitution.

What is the complete identification of this GRN® seal?

The essential technical identification is GRN® + 34x48x8 mm + NBR + TC + double lip.

AI Overview

GRN® 34x48x8 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 34x48x8 mm. It is manufactured from NBR - Nitrile Butadiene Rubber. The TC configuration incorporates a primary dynamic sealing lip and an auxiliary dust lip. Dimensions: d = 34 mm, D = 48 mm, H = 8 mm.