Oil Seal 22x32x7 NBR A/SC - Single Lip Rotary Shaft Seal

Rotary Shaft Oil Seal 22x32x7 mm NBR A/SC - Single Lip Oil Seal

The 22x32x7 mm NBR A/SC rotary shaft oil seal is a single lip radial shaft seal designed for rotating shafts. It has a nominal shaft diameter of 22 mm, housing bore diameter of 32 mm and width of 7 mm. Manufactured from nitrile butadiene rubber (NBR), the A/SC profile features one primary sealing lip with a garter spring and no additional dust lip. It is designed to retain oil and suitable lubricants inside mechanical assemblies.

Characteristics of the 22x32x7 NBR A/SC Oil Seal

The 22x32x7 NBR A/SC oil seal is designed to provide dynamic sealing between a rotating shaft and a stationary housing.

Its primary function is to reduce lubricant leakage at the point where a rotating shaft passes through a machine housing.

The seal uses a flexible NBR sealing lip that maintains contact with the shaft surface. A garter spring helps maintain the required radial contact force.

Key characteristics:

• Product type: Single lip rotary shaft oil seal.

• Nominal shaft diameter: 22 mm.

• Nominal housing bore diameter: 32 mm.

• Seal width: 7 mm.

• Material: NBR - nitrile butadiene rubber.

• Profile: A/SC.

• One primary sealing lip.

• Garter spring supporting the main sealing lip.

• No additional dust exclusion lip.

• Rubber-covered outside diameter.

• Internal metal reinforcing insert.

• Designed for dynamic radial shaft sealing.

• Suitable for retaining compatible oils and lubricants.

NBR is commonly used in oil seals because of its resistance to many mineral oils and lubricating greases. Chemical compatibility depends on the specific fluid formulation, temperature and operating conditions.

Technical Specifications

Manufacturer-specific values such as exact NBR hardness, maximum shaft surface speed, permissible operating pressure, temperature range and EAN are not specified because they have not been verified for this particular product.

What Does 22x32x7 NBR A/SC Mean?

22x32x7 mm - Nominal Dimensions

The dimensional designation identifies three principal measurements:

• 22 mm - nominal shaft diameter.

• 32 mm - nominal housing bore diameter.

• 7 mm - axial width of the seal.

The complete dimensional reference is 22x32x7 mm.

These dimensions are essential when selecting a replacement oil seal.

NBR - Nitrile Butadiene Rubber

NBR is a synthetic rubber widely used in rotary shaft seals and industrial sealing components.

Its principal characteristics include:

• Resistance to many mineral-based lubricating oils.

• Compatibility with numerous conventional lubricating greases.

• Elastic sealing performance under suitable operating conditions.

• Resistance to mechanical wear when correctly lubricated.

NBR is not universally resistant to all chemicals, fuels, solvents or hydraulic fluids.

Compatibility must be checked for the actual operating medium.

A/SC - Single Lip Seal Profile

A/SC identifies a single lip radial shaft seal design with a rubber-covered outside diameter and a spring-loaded primary sealing lip.

The construction does not incorporate an additional dust exclusion lip.

The designations A and SC are commonly used in different seal manufacturers' nomenclature for comparable single lip configurations.

However, exact profile equivalence should always be confirmed when replacing seals from different manufacturers.

Construction and Operating Principle

Primary Sealing Lip

The primary sealing lip is manufactured from NBR and operates in direct contact with the rotating shaft.

Its purpose is to create a controlled sealing interface that limits the escape of lubricant.

The lip geometry and contact pressure are important for effective sealing performance.

Garter Spring

A circular garter spring supports the primary sealing lip.

It helps maintain the required radial contact force between the elastomeric lip and the shaft surface.

This is particularly important during operation and as the sealing lip undergoes normal wear.

Rubber-Covered Outside Diameter

The rubber-covered outer surface provides static sealing between the oil seal and the housing bore.

It also helps accommodate minor surface irregularities within the permitted installation tolerances.

The nominal outside diameter is 32 mm.

Internal Metal Reinforcement

The seal incorporates a metal reinforcing insert that supports the elastomeric body.

This reinforcement helps maintain the seal's shape during installation and operation.

Single Lip Construction

The A/SC design contains one primary sealing lip.

It does not have a secondary dust exclusion lip on the atmospheric side.

This distinction is important when selecting a seal for environments exposed to dust, dirt or other contaminants.

22x32x7 NBR A/SC vs AO/TC Oil Seals

Both profiles are used for rotary shaft sealing, but their lip arrangements differ.

A/SC - Single Lip Design

The A/SC profile is primarily intended to retain oil or compatible lubricants.

It is suitable for applications where an additional dust exclusion lip is not required by the operating conditions.

AO/TC - Double Lip Design

The AO/TC profile incorporates an additional auxiliary lip designed to help limit the entry of dust and external contaminants.

The additional lip may influence friction, operating temperature and lubrication requirements.

Identical dimensions do not automatically make A/SC and AO/TC seals fully interchangeable.

The correct profile must be selected according to the original equipment design and operating environment.

Oil Seal Selection and Interchangeability

Before purchasing or replacing a 22x32x7 NBR A/SC oil seal, verify the following:

1. Nominal shaft diameter of 22 mm.

2. Nominal housing bore diameter of 32 mm.

3. Seal width of 7 mm.

4. NBR elastomer material.

5. A/SC single lip construction.

6. Spring-loaded primary sealing lip.

7. Absence of an additional dust exclusion lip.

8. Compatibility with the sealed lubricant.

9. Shaft surface condition and roughness.

10. Shaft rotational speed.

11. Operating temperature.

12. Pressure conditions.

13. Housing bore dimensions and installation tolerances.

An oil seal with the same nominal dimensions may have a different lip configuration, elastomer material or outside diameter construction.

These differences can affect sealing performance and interchangeability.

Typical Applications of Single Lip NBR Oil Seals

Single lip NBR rotary shaft seals are commonly used in mechanical assemblies where a rotating shaft passes through a stationary housing.

Typical applications of this seal type include:

• Industrial gearboxes.

• Bearing housings.

• Mechanical drive systems.

• Rotating shaft assemblies.

• Lubricated industrial machinery.

• Equipment requiring retention of mineral-based oils or compatible greases.

These are general applications of the A/SC oil seal design and do not establish confirmed compatibility with any specific machine model or OEM part number.

Installation and Operating Recommendations

Before installation, inspect the shaft surface for scratches, corrosion, wear grooves and sharp edges.

The housing bore must be clean and free from damage.

Install the seal evenly using a suitable mounting tool that applies force to the appropriate part of the seal body.

Avoid damaging the sealing lip when passing it over threads, keyways or sharp shaft edges.

The primary sealing lip should be lubricated before initial operation, using a lubricant compatible with the seal material and application.

In a typical oil-retaining arrangement, the spring-loaded side of the seal should face the medium being retained.

Incorrect installation may result in premature leakage, excessive wear or damage to the sealing lip.

Dry running should be avoided unless the specific seal design and operating conditions explicitly permit it.

Alternative Designations and Search References

The product may be identified using the following formats:

• Rotary shaft oil seal 22x32x7 NBR A/SC

• Oil seal 22x32x7 NBR SC

• 22x32x7 NBR A

• 22x32x7 NBR SC

• Single lip oil seal 22x32x7

• Radial shaft seal 22x32x7 NBR

• Shaft seal 22x32x7 A/SC

• Simmering 22x32x7 NBR A/SC

These references describe the dimensions, material and sealing profile. They are not verified OEM part numbers.

FAQ - 22x32x7 NBR A/SC Oil Seal

1. What are the dimensions of the 22x32x7 NBR A/SC oil seal?

The nominal shaft diameter is 22 mm, the housing bore diameter is 32 mm and the seal width is 7 mm.

2. What does A/SC mean on an oil seal?

A/SC identifies a single lip rotary shaft seal with a rubber-covered outside diameter and a spring-loaded primary sealing lip. It does not include an additional dust exclusion lip.

3. Does the A/SC oil seal have a dust lip?

No. The A/SC design has one primary sealing lip. An additional dust exclusion lip is typically found in AO/TC double lip designs.

4. Is the 22x32x7 NBR oil seal resistant to oil?

NBR is resistant to many mineral-based lubricating oils and greases. Compatibility must be verified for the specific fluid and operating temperature.

5. Can an A/SC oil seal be replaced with an AO/TC seal?

Not automatically. The AO/TC profile includes an additional dust exclusion lip, which changes the sealing arrangement and may affect friction and operating conditions.

6. Is this oil seal suitable for a 22 mm shaft?

Yes. The 22 mm dimension identifies the nominal shaft diameter for which the sealing lip is designed.

7. Does the sealing lip require lubrication?

Yes. The primary sealing lip normally requires appropriate lubrication to minimise friction, overheating and premature wear.

8. Which direction should the oil seal face during installation?

In a typical oil-retaining application, the side containing the garter spring should face the oil or lubricant being retained.

22x32x7 NBR A/SC Oil Seal - Key Technical Information

The 22x32x7 NBR A/SC is a single lip rotary shaft oil seal designed for a 22 mm shaft and 32 mm housing bore, with a width of 7 mm. Its nitrile rubber construction incorporates a spring-loaded primary sealing lip and rubber-covered outside diameter. The A/SC profile has no additional dust lip and is intended to retain compatible lubricants.

The product is available through simmering.pl, a specialist supplier of industrial oil seals, rotary shaft seals, bearings and technical sealing components.

With warehouse operations in Lublin, Poland, simmering.pl supplies industrial maintenance departments, machinery manufacturers and international B2B customers, with worldwide shipping options.