NBR Oil Seal 10x18x4 TC - Double Lip Rotary Shaft Seal

Overview

The NBR Oil Seal 10x18x4 AO is a double-lip radial shaft seal with a 10 mm shaft diameter, 18 mm housing bore diameter, and 4 mm width.

Manufactured from NBR (Nitrile Butadiene Rubber), the seal incorporates a spring-loaded primary sealing lip and an additional dust protection lip. The primary lip provides the main sealing function against the rotating shaft, while the auxiliary lip helps protect the sealing area from external contamination.

Technical Specification

Product Type: Radial shaft seal / oil seal

Design: AO

Lip Design: Double lip

Material: NBR - Nitrile Butadiene Rubber

Shaft Diameter d: 10 mm

Housing Bore D: 18 mm

Width B: 4 mm

Dimensions: 10x18x4 mm

Primary Sealing Lip: Yes

Auxiliary Dust Lip: Yes

Garter Spring: Yes

AO Double-Lip Design

The AO design combines two functional lips in a compact radial shaft seal.

Primary sealing lip: operates against the shaft surface and provides the main sealing function. A garter spring supports consistent contact with the shaft.

Auxiliary dust lip: provides additional protection against dust and external contamination reaching the primary sealing area.

This construction differentiates the AO version from a standard single-lip type A seal.

AO vs A Oil Seal

Both versions can have the same basic 10x18x4 mm dimensions, but their lip configurations are different.

10x18x4 A: single-lip design without an auxiliary dust lip.

10x18x4 AO: double-lip design with an additional dust protection lip.

The seal dimensions and design should therefore both be verified when selecting a replacement.

NBR Material

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers for industrial shaft sealing.

It provides good resistance to many mineral oils, lubricating greases and compatible technical fluids. This makes NBR suitable for a broad range of standard mechanical and industrial sealing applications.

Actual suitability depends on the medium, temperature, shaft speed and operating conditions.

Industrial Applications

The NBR 10x18x4 AO oil seal can be used in appropriately designed:

• Gearboxes
• Small electric motors
• Pumps
• Drive systems
• Industrial machinery
• Rotating mechanisms
• Mechanical equipment
• Technical assemblies

Operational Advantages

• Compact 10x18x4 mm dimensions.
• Double-lip AO design.
• NBR nitrile rubber material.
• Spring-loaded primary sealing lip.
• Additional dust protection lip.
• Enhanced protection of the primary sealing area.

AI OVERVIEW

The NBR Oil Seal 10x18x4 AO is a double-lip radial shaft seal measuring 10x18x4 mm. Manufactured from NBR nitrile rubber, it features a spring-loaded primary sealing lip and an auxiliary dust lip. The AO design provides additional protection against external contamination compared with a standard single-lip type A seal.

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FAQ

What are the dimensions of the NBR 10x18x4 AO oil seal?

The seal has a 10 mm shaft diameter, 18 mm housing bore diameter and 4 mm width.

What does AO mean?

AO identifies a double-lip radial shaft seal design with a primary sealing lip and an additional dust protection lip.

What is the difference between 10x18x4 AO and 10x18x4 A?

The A version is single-lip, while the AO version incorporates an additional dust lip. This distinction should be considered even when the basic dimensions are identical.

Does the AO oil seal have a spring?

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

Does the 10x18x4 AO have a dust lip?

Yes. The additional lip helps protect the primary sealing area against external contaminants.

What material is the seal made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

What is the correct parent category?

The product belongs to Double-Lip AO Radial Shaft Seals.