Rotary Shaft Seal 290x330x16 NBR B1 - Single Lip Metal Cased Oil Seal

Rotary Shaft Seal 290x330x16 NBR B1 - Single Lip Metal Cased Oil Seal

Rotary Shaft Seal 290x330x16 NBR B1 is a large-diameter, single-lip radial shaft seal with dimensions 290x330x16 mm. The B1 design features a spring-loaded primary sealing lip made from NBR (Nitrile Butadiene Rubber) and a metal outside diameter. It does not incorporate an additional secondary dust lip.

Technical data

290x330x16 mm dimensions

The designation 290x330x16 mm defines:

290 mm - nominal shaft diameter
330 mm - nominal housing bore diameter
16 mm - seal width

When selecting a replacement, the dimensions alone are not sufficient. The B1 construction, NBR material, single-lip configuration and metal outside diameter should also be verified.

What does B1 mean?

For this product, B1 identifies a single-lip rotary shaft seal with a metal outside diameter.

The construction features:

• one primary sealing lip
• a garter spring acting on the primary lip
• metal outside diameter
• metal supporting case
• no additional secondary dust lip

The metal outside diameter is an important feature that distinguishes the B1 design from common rubber-covered rotary shaft seals.

Single-lip construction

The 290x330x16 NBR B1 has one primary sealing lip that operates directly against the rotating shaft surface.

A garter spring helps maintain the required contact between the sealing edge and the shaft.

This B1 seal does not have an additional dust lip. This feature should be checked carefully when identifying or selecting a replacement seal.

Metal cased construction

A characteristic feature of the B1 design is its metal outside diameter.

The external metal surface is fitted directly into the housing bore. This differs from common rubber-covered rotary shaft seals, where the outer metal reinforcement is covered with elastomer.

A 290x330x16 B1 seal should therefore not automatically be replaced with a rubber-covered seal simply because the nominal dimensions are identical.

Housing design, fit and installation requirements should also be considered.

NBR - Nitrile Butadiene Rubber

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

NBR is one of the most widely used elastomers in rotary shaft sealing technology and is commonly used in applications involving mineral oils and greases.

Actual suitability depends on the specific medium and operating conditions. Temperature, shaft surface speed, lubricant and environmental conditions should therefore be considered when selecting the seal.

B1 vs rubber-covered single-lip oil seal

The primary difference is the construction of the outside diameter.

B1 - single spring-loaded primary sealing lip, no additional dust lip and a metal outside diameter.

A/SC type - single spring-loaded primary sealing lip and no additional dust lip, but with a rubber-covered outside diameter.

The same 290x330x16 mm dimensions therefore do not automatically mean that the two designs are fully interchangeable.

B1 vs double-lip oil seal

This B1 seal is a single-lip design.

It has one spring-loaded primary sealing lip and no additional secondary dust lip.

A double-lip rotary shaft seal incorporates an additional lip on the external side of the primary sealing area. The complete design designation should always be checked because seal coding systems can vary between manufacturers.

Function of the 290x330x16 B1 oil seal

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

The spring-loaded primary lip operates against the shaft surface and helps retain a compatible lubricant or other medium within the operating area.

With dimensions of 290x330x16 mm, this is a large-diameter rotary shaft seal. The exact application should be confirmed using machine documentation or the dimensions and construction of the original seal.

Alternative designations and search references

This product may also be encountered under the following descriptions:

• Rotary Shaft Seal 290x330x16 NBR B1
• B1 Oil Seal 290x330x16 NBR
• Oil Seal 290x330x16 NBR B1
• Metal Cased Oil Seal 290x330x16
• Single Lip Oil Seal 290x330x16
• NBR Oil Seal 290x330x16 B1
• Shaft Seal 290x330x16 B1
• 290x330x16 NBR B1

The recommended international product name is:

Rotary Shaft Seal 290x330x16 NBR B1 - Single Lip Metal Cased Oil Seal

The B1 designation should be retained because construction codes can vary between manufacturers.

Selecting a 290x330x16 NBR B1 seal

Before ordering, verify:

• shaft diameter 290 mm
• housing bore diameter 330 mm
• width 16 mm
• NBR sealing material
• B1 construction
• single primary sealing lip
• spring-loaded sealing lip
• absence of an additional dust lip
• metal outside diameter
• sealed medium
• operating temperature
• shaft surface speed
• shaft sealing surface condition
• housing bore requirements

Matching the 290x330x16 mm dimensions alone does not guarantee full interchangeability.

Installation

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

Because the B1 design has a metal outside diameter, the condition and dimensions of the housing bore are particularly important.

The seal should be pressed evenly into the housing around its entire circumference without tilting or deforming the metal case.

The spring-loaded primary sealing lip should normally face the medium to be retained.

FAQ - Rotary Shaft Seal 290x330x16 NBR B1

What are the dimensions of this B1 oil seal?

The dimensions are 290x330x16 mm: 290 mm shaft diameter, 330 mm outside diameter and 16 mm width.

Is B1 a single-lip design?

For this product, yes. The B1 design has one spring-loaded primary sealing lip and no additional dust lip.

Does the B1 seal have a metal outside diameter?

Yes. A key feature of this construction is its metal outside diameter.

What material is the sealing lip made from?

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

Does B1 have an additional dust lip?

No. This is a single-lip construction without an additional secondary dust lip.

Is B1 the same as SC?

No. Both can be single-lip designs, but SC typically refers to a rubber-covered outside diameter, while this B1 construction has a metal outside diameter.

Can a rubber-covered seal replace this B1 seal?

It should not automatically be considered interchangeable. The housing design, fit, outside diameter construction and operating requirements should be checked.

Can any 290x330x16 oil seal be used as a replacement?

No. In addition to dimensions, the sealing material, lip configuration, outside diameter construction and operating conditions must be verified.

Rotary Shaft Seal 290x330x16 NBR B1 - key information

Rotary Shaft Seal 290x330x16 NBR B1 is a large-diameter, single-lip radial shaft seal with a metal outside diameter. It has dimensions of 290x330x16 mm, an NBR primary sealing lip with a garter spring and no additional secondary dust lip. The B1 construction should be verified when selecting a replacement, not just the nominal dimensions.

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