Rotary Shaft Seal 440x480x20 NBR TC - Double Lip Oil Seal

Rotary Shaft Seal 440x480x20 NBR TC - Double Lip Oil Seal

Rotary Shaft Seal 440x480x20 NBR TC is a large-diameter radial shaft seal manufactured from NBR (Nitrile Butadiene Rubber). It has dimensions of 440x480x20 mm and a double-lip TC design, consisting of a spring-loaded primary sealing lip and an additional dust lip. The rubber-covered outside diameter provides the external sealing surface within the housing bore.

Technical data

440x480x20 mm dimensions

The designation 440x480x20 mm defines:

440 mm - nominal shaft diameter
480 mm - nominal housing bore diameter
20 mm - seal width

Due to the large diameter of this rotary shaft seal, all three dimensions as well as the material and sealing-lip configuration should be carefully verified when selecting a replacement.

What does NBR TC mean?

The designation identifies the material and construction of the seal.

NBR means Nitrile Butadiene Rubber, an elastomer widely used in rotary shaft seals.

TC identifies a double-lip construction with a spring-loaded primary sealing lip and an additional dust lip. The design also incorporates a rubber-covered outside diameter.

TC double-lip design

The 440x480x20 NBR TC rotary shaft seal incorporates two lips with different functions.

The primary sealing lip operates directly against the rotating shaft surface. A garter spring helps maintain contact between the sealing edge and the shaft.

The secondary dust lip is positioned towards the external environment and provides an additional barrier against dust and other contaminants approaching the primary sealing area.

The rubber-covered outside diameter forms the external sealing surface between the seal and the housing bore.

NBR - Nitrile Butadiene Rubber

NBR is one of the most commonly used elastomers in rotary shaft sealing technology.

It is widely used in sealing applications involving mineral oils and greases. Actual suitability, however, depends on the specific medium and operating conditions.

When selecting an NBR rotary shaft seal, the sealed medium, operating temperature, shaft surface speed and environmental conditions should all be considered.

TC vs SC rotary shaft seal

The main difference between TC and SC designs is the additional dust lip.

TC - double-lip design with a spring-loaded primary sealing lip and an additional dust lip.

SC - single-lip design with a spring-loaded primary sealing lip and no additional dust lip.

Even when both designs have identical nominal dimensions, they should not automatically be considered technically interchangeable.

Function of the 440x480x20 rotary shaft seal

A rotary shaft seal is installed between a rotating shaft and a stationary housing.

The primary sealing lip helps retain a compatible lubricant or other medium within the operating area. The additional dust lip helps reduce the ingress of external contamination towards the primary sealing zone.

With dimensions of 440x480x20 mm, this is a large-diameter shaft seal. The exact application should therefore be confirmed from the machine documentation or from the dimensions and construction of the original seal.

Alternative designations and search references

The product may also be encountered under the following descriptions:

• Rotary Shaft Seal 440x480x20 NBR TC
• Oil Seal 440x480x20 NBR TC
• NBR Oil Seal 440x480x20 TC
• Shaft Seal 440x480x20 NBR
• Double Lip Oil Seal 440x480x20
• 440x480x20 NBR TC
• 440x480x20 TC Oil Seal

The recommended English product name is:

Rotary Shaft Seal 440x480x20 NBR TC - Double Lip Oil Seal

Selecting a 440x480x20 NBR TC seal

Before ordering, verify:

• shaft diameter 440 mm
• housing bore diameter 480 mm
• width 20 mm
• NBR elastomer
• TC double-lip construction
• sealed medium
• operating temperature
• shaft surface speed
• condition of the shaft sealing surface
• housing design
• requirements of the specific sealing arrangement

Matching the 440x480x20 mm dimensions alone does not guarantee full interchangeability with every other rotary shaft seal of the same size.

Installation

Before installation, thoroughly clean the shaft and housing bore. The shaft surface in contact with the primary sealing lip should be free from sharp edges, burrs and damage that could cut or prematurely wear the elastomer.

The seal should be pressed evenly into the housing without tilting or deformation. With a large 440 mm shaft diameter, uniform installation around the entire circumference is particularly important.

The spring-loaded primary sealing lip should normally face the medium to be retained. When passing the seal over sharp edges, grooves or other potentially damaging surfaces, the sealing lip should be protected.

FAQ - Rotary Shaft Seal 440x480x20 NBR TC

What are the dimensions of this oil seal?

The seal has a 440 mm shaft diameter, 480 mm outside diameter and 20 mm width. Its complete dimensions are 440x480x20 mm.

What material is the seal made from?

The sealing element is manufactured from NBR (Nitrile Butadiene Rubber).

Is the 440x480x20 TC a double-lip oil seal?

Yes. The TC design incorporates a spring-loaded primary sealing lip and an additional dust lip.

What does TC mean on a rotary shaft seal?

TC commonly identifies a double-lip rotary shaft seal with a spring-loaded primary lip, an additional dust lip and a rubber-covered outside diameter.

What is the purpose of the additional dust lip?

The secondary lip helps reduce the ingress of dust and other external contaminants towards the primary sealing area.

What is the difference between TC and SC?

TC is a double-lip design with an additional dust lip. SC is a single-lip design without the additional dust lip.

Can any 440x480x20 oil seal be used as a replacement?

Not necessarily. In addition to dimensions, the elastomer, lip configuration, outside diameter construction and actual operating conditions must be considered.

Rotary Shaft Seal 440x480x20 NBR TC - key information

Rotary Shaft Seal 440x480x20 NBR TC is a large-diameter, double-lip radial shaft seal manufactured from NBR (Nitrile Butadiene Rubber). It has a spring-loaded primary sealing lip, an additional dust lip and a rubber-covered outside diameter. Its dimensions are 440x480x20 mm: 440 mm shaft diameter, 480 mm outside diameter and 20 mm width.

Available from simmering.pl, a specialist supplier of rotary shaft seals, bearings and industrial sealing solutions. Stock in Poland with worldwide shipping.