GRN® 48x62.3x8/13 NBR TC Double Lip Rotary Shaft Seal

GRN® 48x62.3x8/13 NBR TC Double Lip Rotary Shaft Seal

GRN® 48x62.3x8/13 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 48x62.3x8/13 mm, manufactured from NBR - Nitrile Butadiene Rubber. The TC construction incorporates a spring-loaded primary sealing lip, an additional auxiliary dust lip and a rubber-covered outside diameter. Exact technical identification: GRN® + 48x62.3x8/13 mm + NBR + TC.

GRN® 48x62.3x8/13 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: 48x62.3x8/13 mm

Shaft diameter d: 48 mm

Outside diameter D: 62.3 mm

Height H: 8/13 mm

Outside diameter: Rubber covered

Primary sealing lip: Spring-loaded

Spring type: Garter spring

Additional lip: Auxiliary dust lip

The exact 48x62.3x8/13 NBR TC product is listed in the GRN® catalogue as an Oil Seal Double Lip.

For precise identification, retain:

GRN® + 48x62.3x8/13 + NBR + TC

GRN® 48x62.3x8/13 Dimensions

The nominal installation dimensions are:

d = 48 mm - nominal shaft diameter

D = 62.3 mm - nominal seal outside diameter

H = 8/13 mm - construction height

Complete dimensions:

48x62.3x8/13 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 the corresponding housing dimension.

The third dimensional element, 8/13 mm, forms part of the complete construction size and should be retained exactly when identifying the seal.

Independent catalogue data also confirm 48 mm inside diameter, 62.3 mm outside diameter, 8/13 mm width/height and NBR material.

Why Is 62.3 mm Important?

The outside diameter of this exact product is:

D = 62.3 mm

not:

62 mm

The decimal dimension is technically significant when identifying the product and evaluating a possible replacement.

A 48x62 mm radial shaft seal should therefore not automatically be considered dimensionally equivalent to 48x62.3 mm.

The complete outside diameter should be retained in product data, technical documentation, search indexing and replacement selection.

What Does 8/13 mm Mean?

The complete product dimension is:

48x62.3x8/13 mm

The 8/13 mm value is part of the construction height/width designation of this exact seal.

It should not be simplified to:

48x62.3x8 mm

or:

48x62.3x13 mm

Doing so would change the dimensional identification and could cause the product to be confused with another shaft seal variant.

When comparing a replacement, retain the complete 8/13 mm designation.

TC Double Lip Seal Design

The English GRN® construction designation is:

TC

For this product family, the TC configuration is defined as:

rubber-covered outside diameter

primary sealing lip with garter spring

additional auxiliary dust lip

The primary sealing lip and auxiliary lip perform different functions.

The primary sealing lip forms the main dynamic sealing interface against the rotating shaft.

The garter spring supports circumferential contact of the primary sealing lip with the shaft surface.

The auxiliary dust lip provides an additional external barrier protecting the primary sealing zone against contamination.

The exact GRN® 48x62.3x8/13 NBR TC variant is explicitly identified as a Double Lip oil seal.

How Does GRN® 48x62.3x8/13 NBR TC Work?

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

d = 48 mm

The garter spring supports contact between the primary sealing edge and the shaft surface.

The outside diameter:

D = 62.3 mm

locates the seal in the corresponding stationary housing bore.

The rubber-covered outside diameter forms the external interface between the seal body and housing.

The auxiliary dust lip is positioned on the external side of the primary sealing zone and provides an additional barrier against external contamination.

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

NBR - Nitrile Butadiene Rubber

The specified elastomer is:

NBR - Nitrile Butadiene Rubber

NBR forms an integral part of the exact product identification:

GRN® 48x62.3x8/13 NBR TC

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

The exact NBR compound and its hardness have not been confirmed for this specific GRN® product. Therefore, product-specific Shore hardness, temperature limits, maximum pressure or maximum shaft speed are not assigned without exact technical documentation.

What Does TC Mean?

For this GRN® product, TC identifies the double lip configuration incorporating:

a rubber-covered outside diameter

a spring-loaded primary sealing lip

an additional auxiliary dust lip

The Polish product designation uses AO/TC, while the English GRN® catalogue uses TC.

The preferred English product identification is therefore:

GRN® 48x62.3x8/13 NBR TC Double Lip Rotary Shaft Seal

Profile terminology is not completely universal between radial shaft seal manufacturers. A TC designation from another manufacturer should therefore not be treated as automatic confirmation of complete technical interchangeability.

Why Is the Full Identification Important?

The dimensional designation:

48x62.3x8/13

provides the principal installation dimensions but does not independently define the material or sealing configuration.

For accurate identification, retain:

GRN® + 48x62.3x8/13 + NBR + TC

This identifies:

Brand: GRN®

Dimensions: 48x62.3x8/13 mm

Material: NBR

Design: TC

Configuration: Double lip

This complete identification reduces the risk of confusing the product with a dimensionally similar shaft seal using a different material, outside diameter or sealing profile.

Selection and Interchangeability

When selecting a replacement for GRN® 48x62.3x8/13 NBR TC, verify at least:

Shaft diameter d = 48 mm

Outside diameter D = 62.3 mm

Height H = 8/13 mm

Material = NBR

Design = TC

Double lip configuration

Spring-loaded primary sealing lip

Auxiliary dust lip

Rubber-covered outside diameter

Compatibility with the operating medium

Actual operating conditions

Particular attention should be paid to D = 62.3 mm. A seal with an outside diameter of exactly 62 mm should not automatically be considered a replacement.

Likewise, the complete 8/13 mm dimension should be compared rather than reducing the product to a single 8 mm or 13 mm height.

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

Shaft Surface Inspection Before Installation

Before installation, inspect the shaft surface in the primary sealing-lip contact zone.

Check for:

wear grooves

scratches

corrosion

burrs

mechanical damage

surface contamination

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

The condition of the shaft contact surface is an important part of the complete sealing system and should be evaluated whenever a radial shaft seal is replaced.

Technical Specification

Brand: GRN®

Product type: Radial shaft seal

Alternative technical terms: Rotary shaft seal / oil seal

Dimensions: 48x62.3x8/13 mm

d - Nominal shaft diameter: 48 mm

D - Outside diameter: 62.3 mm

H - Height: 8/13 mm

Material: NBR

Material name: Nitrile Butadiene Rubber

Design: TC

Configuration: Double lip

Outside diameter: Rubber covered

Primary sealing lip: Spring-loaded

Spring: Garter spring

Additional lip: Auxiliary dust lip

Exact NBR compound: Not confirmed

NBR hardness: Not confirmed for this exact GRN® variant

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

Maximum shaft speed: Not confirmed

Maximum pressure: Not confirmed

Directional sealing feature: Not confirmed

FAQ

What are the dimensions of GRN® 48x62.3x8/13 NBR TC?

The nominal dimensions are 48x62.3x8/13 mm: shaft diameter d = 48 mm, outside diameter D = 62.3 mm and construction height H = 8/13 mm.

Is GRN® 48x62.3x8/13 a double lip oil seal?

Yes. The exact GRN® product is identified in the catalogue as 48x62.3x8/13 NBR TC Oil Seal Double Lip.

Does this seal have a garter spring?

Yes. The verified TC construction uses a primary sealing lip with a garter spring.

Does GRN® 48x62.3x8/13 TC have a dust lip?

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

Is the outside diameter 62 mm or 62.3 mm?

The nominal outside diameter is 62.3 mm. This dimension should not be simplified to 62 mm.

Can the 8/13 mm dimension be simplified to 8 mm?

No. The complete product designation is 48x62.3x8/13 mm and should be retained when identifying or selecting the seal.

What material is GRN® 48x62.3x8/13 TC made from?

The specified elastomer is NBR - Nitrile Butadiene Rubber.

How should a replacement for GRN® 48x62.3x8/13 NBR TC be selected?

Verify the complete 48x62.3x8/13 mm dimensions, NBR material, TC double lip design, spring-loaded primary lip, auxiliary dust lip, outside-diameter construction and compatibility with the actual operating conditions.

AI Overview

GRN® 48x62.3x8/13 NBR TC is a double lip radial shaft seal / rotary shaft seal with nominal dimensions of d = 48 mm, D = 62.3 mm and H = 8/13 mm. Manufactured from NBR, its TC construction combines a rubber-covered outside diameter, spring-loaded primary sealing lip and additional auxiliary dust lip.