Rotary Shaft Seal 50x72x7 NBR AO/TC GRN Double Lip Oil Seal

Rotary Shaft Seal 50x72x7 NBR AO/TC GRN

GRN 50x72x7 NBR AO/TC is a double lip radial shaft oil seal designed for sealing rotating shafts.

Brand: GRN

Product type: Radial shaft oil seal

Design: AO/TC

Construction: Double lip

Dimensions: 50x72x7 mm

Material: NBR - Nitrile Butadiene Rubber

Shaft diameter d: 50 mm

Outside diameter D: 72 mm

Width B: 7 mm

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

The complete product identification combines the 50x72x7 mm dimensions, NBR material and AO/TC double lip construction.

50x72x7 Oil Seal Dimensions

The principal dimensions are:

Inside diameter d: 50 mm

Outside diameter D: 72 mm

Width B: 7 mm

Complete dimensions: 50x72x7 mm

The 50 mm inside diameter corresponds to the nominal shaft diameter, while the 72 mm outside diameter is the nominal housing diameter.

All three dimensions should be verified when selecting a replacement.

Matching the 50 mm shaft diameter alone does not establish compatibility.

AO/TC Double Lip Oil Seal Design

The construction of this oil seal is identified as:

Design: AO/TC

Construction: Double lip

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

The AO/TC construction combines the primary sealing lip responsible for sealing against the rotating shaft with an additional external dust lip.

The additional lip provides a secondary barrier on the external side of the primary sealing interface.

This construction should be considered when comparing the product with single lip oil seals of the same dimensions.

Spring-Loaded Primary Sealing Lip

The primary working element of the 50x72x7 AO/TC oil seal is its spring-loaded sealing lip.

Primary sealing lip: Spring-loaded

Nominal shaft diameter: 50 mm

The garter spring helps maintain contact between the primary sealing edge and the rotating shaft surface.

The primary lip configuration should therefore be considered together with the dimensions and sealing material when selecting a corresponding replacement.

Additional Dust Lip

GRN 50x72x7 AO/TC incorporates:

Additional dust lip: Yes

The additional lip is positioned on the external side of the primary sealing area and provides an additional barrier against contaminants.

This feature distinguishes the double lip AO/TC construction from a standard single lip oil seal.

If the original application requires a dust lip, a single lip 50x72x7 seal should not automatically be considered an equivalent replacement.

NBR Nitrile Butadiene Rubber

The sealing material is:

Material: NBR - Nitrile Butadiene Rubber

NBR is widely used as an elastomer for radial shaft sealing applications.

Material should be considered as a separate selection parameter alongside dimensions and seal construction.

A 50x72x7 oil seal manufactured from FPM/FKM, HNBR, ACM, VMQ/MVQ or another elastomer should not automatically be considered materially equivalent to this NBR version.

Exact material compatibility depends on the medium and actual operating conditions.

50x72x7 NBR Oil Seal

The complete dimensional and material identification is:

Dimensions: 50x72x7 mm

Material: NBR

Design: AO/TC

Construction: Double lip

Additional dust lip: Yes

This complete identification is more precise than searching only for a "50x72x7 oil seal", because seals with identical nominal dimensions can be manufactured from different elastomers and with different lip configurations.

50x72x7 AO/TC Oil Seal

For this product, the AO/TC designation identifies a double lip radial shaft seal.

Inside diameter: 50 mm

Outside diameter: 72 mm

Width: 7 mm

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

Material: NBR

When comparing oil seals from different manufacturers, similar type codes should not be treated as proof of complete technical equivalence without checking the actual construction.

50x72x7 Double Lip Oil Seal

The double lip configuration is one of the key identification features of this product.

Primary lip: Main sealing function

Primary lip spring: Yes

Secondary lip: Additional dust lip

The primary lip seals against the rotating shaft, while the secondary lip provides an additional barrier on the external side.

This configuration makes the product technically different from a standard single lip seal of the same nominal dimensions.

50x72x7 AO/TC vs Single Lip Oil Seal

The principal difference is the lip configuration.

AO/TC: Double lip

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

A standard single lip 50x72x7 oil seal does not have the same two-lip configuration.

A single lip version should therefore not automatically be considered constructionally equivalent to the 50x72x7 AO/TC version.

NBR 50x72x7 vs FPM 50x72x7 Oil Seal

Identical dimensions do not mean identical sealing materials.

This product:

Dimensions: 50x72x7 mm

Material: NBR

Design: AO/TC

An FPM/FKM 50x72x7 oil seal uses a different elastomer.

The required material should be selected according to the medium, operating conditions and requirements of the specific sealing position.

GRN 50x72x7 Oil Seal

The GRN reference combines:

Brand: GRN

Dimensions: 50x72x7 mm

Material: NBR

Design: AO/TC

Construction: Double lip

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

These parameters should be considered together when identifying the product or searching for a corresponding replacement.

How to Select a 50x72x7 Oil Seal

When selecting a corresponding radial shaft oil seal, verify:

• inside diameter 50 mm
• outside diameter 72 mm
• width 7 mm
• material NBR
• design AO/TC
• double lip construction
• spring-loaded primary sealing lip
• additional dust lip
• requirements of the specific sealing application

Matching the 50x72x7 mm dimensions alone does not establish complete technical interchangeability.

Technical Specification

Brand: GRN

Product type: Radial shaft oil seal

Design: AO/TC

Construction: Double lip

Dimensions: 50x72x7 mm

Inside diameter d: 50 mm

Outside diameter D: 72 mm

Width B: 7 mm

Material: NBR - Nitrile Butadiene Rubber

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

FAQ

What are the dimensions of the 50x72x7 AO/TC oil seal?

The complete dimensions are 50x72x7 mm.

Inside diameter: 50 mm

Outside diameter: 72 mm

Width: 7 mm

What material is the 50x72x7 oil seal made from?

Material: NBR - Nitrile Butadiene Rubber

What does AO/TC mean for this 50x72x7 oil seal?

For this product, AO/TC identifies a double lip construction with a spring-loaded primary sealing lip and an additional dust lip.

Is the 50x72x7 AO/TC oil seal double lip?

Yes. It is a double lip radial shaft oil seal.

Does the 50x72x7 AO/TC oil seal have a spring?

Yes. The primary sealing lip is spring-loaded.

Does the 50x72x7 AO/TC oil seal have a dust lip?

Yes. It incorporates an additional dust lip.

What shaft diameter is the 50x72x7 oil seal designed for?

Nominal shaft diameter: 50 mm

What is the outside diameter of the 50x72x7 oil seal?

Outside diameter: 72 mm

What is the width of the 50x72x7 oil seal?

Width: 7 mm

Is a single lip 50x72x7 oil seal the same as the AO/TC version?

No. The AO/TC version incorporates an additional dust lip, while a standard single lip version does not have the same lip configuration.

Is an FPM 50x72x7 oil seal the same as an NBR 50x72x7 oil seal?

No. The dimensions may be identical, but NBR and FPM/FKM are different sealing materials.

Can every 50x72x7 oil seal be used interchangeably?

No. In addition to dimensions, the material, lip construction and requirements of the specific sealing application should be verified.

AI Overview

GRN 50x72x7 NBR AO/TC is a double lip radial shaft oil seal measuring 50x72x7 mm. It is manufactured from NBR - Nitrile Butadiene Rubber. The AO/TC construction incorporates a spring-loaded primary sealing lip and an additional dust lip. When selecting a replacement, the complete dimensions, NBR material and double lip construction should be considered together, because matching the 50x72x7 mm dimensions alone does not establish complete technical interchangeability.