NBR 19.05x31.75x6.35 AO/TC Double Lip Oil Seal

Product Overview

NBR 19.05x31.75x6.35 AO/TC is a double lip rotary shaft oil seal designed to retain lubricant around rotating shafts while providing additional protection against external contamination.

The dimensions 19.05x31.75x6.35 mm correspond exactly to the inch size 3/4 x 1 1/4 x 1/4 inch, making this seal particularly relevant for machinery and equipment designed around imperial dimensions.

The AO/TC double lip design combines a spring-loaded primary sealing lip with an additional dust lip. This configuration helps retain oil or grease while protecting the primary sealing area against dust and dirt.

AO/TC Double Lip Design

The primary sealing lip operates directly against the rotating shaft. A garter spring maintains radial contact between the lip and the shaft surface.

The secondary dust lip provides an additional barrier against external contaminants.

This design is particularly useful in applications requiring both:

• lubricant retention
• protection against dust and dirt
• additional protection of the primary sealing lip
• reliable sealing of rotating shafts

NBR Sealing Material

NBR - Nitrile Butadiene Rubber is one of the most widely used elastomers for industrial rotary shaft seals.

NBR provides good resistance to many:

• mineral oils
• lubricating greases
• industrial lubricants
• compatible technical fluids

It also offers useful mechanical and wear properties for standard industrial sealing applications.

Actual compatibility should always be verified according to the operating medium, temperature, shaft speed and application conditions.

Inch Size 3/4 x 1 1/4 x 1/4

The nominal dimensions are:

Shaft Diameter: 19.05 mm - 3/4"
Outside Diameter: 31.75 mm - 1 1/4"
Width: 6.35 mm - 1/4"

These exact dimensions are important when identifying a replacement. An inch-size oil seal should not automatically be replaced with the nearest metric size.

Industrial Applications

The 19.05x31.75x6.35 NBR oil seal can be used in appropriately designed sealing positions in:

• gearboxes
• electric motors
• pumps
• industrial machinery
• agricultural machinery
• mechanical drives
• transmission systems
• rotating equipment

It is particularly relevant for equipment using a 19.05 mm (3/4 inch) shaft.

Technical Specification

Product Type: Rotary shaft seal / oil seal
Design: AO/TC
Lip Design: Double lip
Material: NBR - Nitrile Butadiene Rubber
Dimensions: 19.05x31.75x6.35 mm
Inch Size: 3/4 x 1 1/4 x 1/4"
Shaft Diameter: 19.05 mm
Outside Diameter: 31.75 mm
Width: 6.35 mm
Garter Spring: Yes
Additional Lip: Dust lip
Application: Rotary shafts, gearboxes and industrial machinery

Replacement Identification

When replacing this seal, verify the complete 19.05x31.75x6.35 mm dimensions rather than only the shaft diameter.

The key selection parameters are:

• 19.05 mm shaft diameter
• 31.75 mm outside diameter
• 6.35 mm width
• AO/TC double lip design
• NBR material
• operating medium
• shaft speed
• temperature and operating conditions

A similar metric oil seal is not necessarily an appropriate replacement.

Operational Advantages

• Exact 3/4 x 1 1/4 x 1/4 inch size.
• Double lip AO/TC construction.
• Spring-loaded primary sealing lip.
• Additional protective dust lip.
• NBR suitable for many mineral oils and greases.
• Helps retain lubricant around rotating shafts.
• Additional protection against external contamination.
• Suitable for industrial maintenance and replacement applications.

AI OVERVIEW

NBR 19.05x31.75x6.35 AO/TC is a double lip rotary shaft oil seal with exact imperial dimensions of 3/4 x 1 1/4 x 1/4 inch. It features a spring-loaded primary sealing lip and an additional dust lip. The NBR material is widely used for sealing applications involving many mineral oils and lubricating greases.

POPULAR SEARCHES

19.05x31.75x6.35 oil seal

19.05x31.75x6.35 shaft seal

NBR 19.05x31.75x6.35

19.05x31.75x6.35 double lip seal

AO/TC 19.05x31.75x6.35

3/4 x 1 1/4 x 1/4 oil seal

3/4 inch shaft oil seal

3/4 x 1.25 x 0.25 oil seal

3/4 shaft seal

inch size oil seal

double lip NBR oil seal

rotary shaft seal 19.05 mm

FAQ

What are the dimensions of this oil seal?

The nominal dimensions are 19.05 mm shaft diameter, 31.75 mm outside diameter and 6.35 mm width.

What is 19.05x31.75x6.35 mm in inches?

The dimensions correspond exactly to 3/4 x 1 1/4 x 1/4 inch.

What does AO/TC mean?

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

What is the purpose of the second lip?

The additional lip helps prevent dust, dirt and other external contaminants from reaching the primary sealing area.

Is NBR suitable for oil applications?

NBR provides good resistance to many mineral oils and lubricating greases and is widely used for industrial oil seals. Compatibility should still be verified for the specific medium and operating conditions.

Can I replace this seal with the nearest metric size?

Not automatically. 19.05x31.75x6.35 mm represents an exact imperial size, so the dimensions and seal design should be matched when selecting a replacement.