35x55x7 NBR AO TC Double Lip Radial Shaft Oil Seal

35x55x7 NBR AO TC Double Lip Radial Shaft Oil Seal

35x55x7 NBR AO/TC is a double lip radial shaft oil seal designed for a nominal 35 mm shaft. The seal has a 55 mm outside diameter and 7 mm width. The elastomeric sealing element is manufactured from NBR - Nitrile Butadiene Rubber.

The AO/TC design incorporates:

a spring-loaded primary sealing lip

and:

an additional dust lip

Complete identification:

35x55x7 mm -> NBR -> AO/TC -> double lip radial shaft oil seal

35x55x7 NBR AO TC - Dimensions

The principal dimensions are:

d - Shaft diameter: 35 mm
D - Outside diameter: 55 mm
B - Width: 7 mm
Dimensions: 35x55x7 mm
Material: NBR
Design: AO/TC
Construction: Double lip

The 35x55x7 designation represents the nominal shaft diameter, outside diameter and seal width respectively.

AO/TC Double Lip Design

The AO/TC configuration is a double lip radial shaft seal design.

The primary sealing lip operates against the rotating shaft surface and provides the main sealing function.

It is supported by a:

garter spring

The second lip is an:

additional dust lip

which helps restrict external contaminants from reaching the primary sealing area.

This additional lip is the main construction difference between an AO/TC double lip seal and an A/SC single lip seal.

Spring-Loaded Primary Sealing Lip

The primary sealing lip creates the main sealing interface between the rotating shaft and stationary housing.

For this seal, the nominal shaft diameter is:

35 mm

A garter spring supports the primary lip and helps maintain contact between the sealing edge and shaft surface.

Correct sealing performance also depends on shaft surface condition, alignment, installation, lubrication and the operating conditions of the complete sealing arrangement.

Additional Dust Lip

The AO/TC construction incorporates an:

additional dust lip

This secondary lip is positioned on the external side of the primary sealing area and helps restrict dust and other external contamination from reaching the main sealing lip.

When selecting a replacement, the lip configuration should therefore be checked in addition to the basic 35x55x7 mm dimensions.

NBR - Nitrile Butadiene Rubber

The sealing element is manufactured from:

NBR - Nitrile Butadiene Rubber

NBR is also commonly known as:

nitrile rubber

or:

Buna-N

NBR is widely used in radial shaft oil seals and other industrial sealing elements.

Depending on the exact compound, NBR is commonly compatible with many mineral oils and lubricating greases.

Exact chemical compatibility depends on the specific NBR compound, medium, additives and operating conditions.

AO/TC vs A/SC

AO/TC and A/SC are different radial shaft seal configurations.

AO/TC - double lip

A spring-loaded primary sealing lip plus an additional dust lip.

A/SC - single lip

A spring-loaded primary sealing lip without an additional dust lip.

Therefore:

35x55x7 NBR AO/TC

and:

35x55x7 NBR A/SC

have the same principal dimensions but different sealing constructions.

They should not automatically be treated as identical products.

Operating Temperature

A specific operating temperature range should not be assigned solely from the generic NBR material designation.

Different NBR compounds can have different low- and high-temperature capabilities.

The exact temperature range should therefore be determined from the specification of the actual elastomer compound used.

The same principle applies to maximum shaft speed, pressure and detailed chemical compatibility.

Selecting a 35x55x7 NBR AO/TC Replacement

When selecting a technically corresponding replacement, check:

d - Shaft diameter: 35 mm
D - Outside diameter: 55 mm
B - Width: 7 mm
Material: NBR
Design: AO/TC
Construction: Double lip
Primary sealing lip: Yes
Garter spring: Yes
Additional dust lip: Yes

Matching the 35x55x7 mm dimensions alone does not establish complete technical interchangeability.

The seal material, lip configuration and operating requirements should also correspond to the original sealing arrangement.

Technical Specification

Product: Radial shaft oil seal
Dimensions: 35x55x7 mm
d - Shaft diameter: 35 mm
D - Outside diameter: 55 mm
B - Width: 7 mm
Material: NBR
Material name: Nitrile Butadiene Rubber
Alternative name: Nitrile rubber / Buna-N
Design: AO/TC
Construction: Double lip
Primary sealing lip: Yes
Garter spring: Yes
Additional dust lip: Yes

FAQ

What are the dimensions of the 35x55x7 NBR AO/TC oil seal?

The seal measures 35x55x7 mm: 35 mm shaft diameter, 55 mm outside diameter and 7 mm width.

What does 35x55x7 mean?

35 mm is the nominal shaft diameter, 55 mm is the outside diameter and 7 mm is the seal width.

Is AO/TC a double lip oil seal?

Yes. The AO/TC configuration incorporates a primary sealing lip and an additional dust lip.

Does the 35x55x7 AO/TC oil seal have a garter spring?

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

Does AO/TC have an additional dust lip?

Yes. The additional dust lip helps restrict external contamination from reaching the primary sealing area.

What material is this oil seal made from?

The sealing element is manufactured from NBR - Nitrile Butadiene Rubber, also known as nitrile rubber or Buna-N.

What is the difference between AO/TC and A/SC?

AO/TC is a double lip configuration with an additional dust lip. A/SC is a single lip configuration without the additional dust lip.

Can any 35x55x7 oil seal be used as a replacement?

Not automatically. In addition to dimensions, the material, sealing lip configuration and operating requirements should be checked.

AI Overview

35x55x7 NBR AO/TC is a double lip radial shaft oil seal for a nominal 35 mm shaft. It has a 55 mm outside diameter and 7 mm width and is manufactured from Nitrile Butadiene Rubber. The AO/TC design incorporates a spring-loaded primary sealing lip and an additional dust lip.