Oil Seal 42x62x7 NBR TC - Double Lip Radial Shaft Seal

1. Technical Specification

The TC profile identifies a commonly used double-lip radial shaft seal construction. It does not independently establish permissible shaft speed, operating pressure or temperature limits.

2. TC Double-Lip Oil Seal Construction

Oil Seal 42x62x7 NBR TC belongs to the category of radial shaft seals designed to restrict lubricant leakage where a rotating shaft passes through a stationary housing.

The double-lip configuration combines a primary sealing function with additional protection against external contamination.

Main Construction Elements

Primary sealing lip

The primary lip contacts the rotating shaft surface and helps retain lubricating oil or another compatible operating medium within the mechanical assembly.

Additional dust exclusion lip

The secondary lip provides an additional barrier against dust and small external contaminants reaching the primary sealing area.

NBR elastomer

Nitrile rubber provides the elastic properties required for sealing contact between the lip and shaft surface.

Seal body

A typical TC seal incorporates a rubber-covered outside diameter with internal metal reinforcement.

Garter spring

Conventional TC designs generally incorporate a circumferential garter spring supporting the primary sealing lip and helping maintain contact pressure against the shaft.

The exact reinforcement, spring construction and auxiliary materials must be verified for the specific manufacturer.

3. What Does AO/TC Mean?

AO and TC are designations used to identify a family of radial shaft seals with a primary sealing lip and an additional dust exclusion lip.

In industrial product terminology:

• AO is a designation used in Polish technical and commercial nomenclature for double-lip shaft seals.

• TC is an internationally recognized designation for a common double-lip radial shaft seal design with a rubber-covered outside diameter.

The principal characteristic is the combination of lubricant retention and additional dust protection.

AO and TC are frequently treated as corresponding commercial designations. However, exact interchangeability must be verified against the relevant manufacturer's dimensional and construction specifications.

4. NBR Material - Technical Properties

NBR (Nitrile Butadiene Rubber) is a synthetic elastomer widely used in industrial sealing technology.

It is particularly valued for its compatibility with many mineral oil-based lubricants and industrial greases.

Typical NBR Properties

• Good resistance to many mineral oils.

• Good compatibility with numerous mineral oil-based greases.

• Elastic behaviour suitable for many dynamic sealing applications.

• Wear resistance dependent on compound formulation.

• Limited resistance to ozone and prolonged atmospheric exposure.

• Limited compatibility with certain organic solvents.

The properties of a specific oil seal depend on the NBR compound formulation, hardness, seal geometry and actual operating conditions.

5. Chemical Resistance of NBR

This table describes the general NBR material family and does not represent confirmed chemical resistance testing of the exact product.

6. Temperature Resistance

For many standard NBR compounds, an approximate operating temperature range of -30°C to +100°C is commonly referenced.

Specialized NBR formulations may have different operating limits.

This range is general material guidance and is not a confirmed temperature specification for Oil Seal 42x62x7 NBR TC.

In dynamic shaft sealing applications, the temperature at the sealing lip may exceed the temperature of the surrounding lubricant due to friction.

Shaft speed, lubrication conditions and contact pressure must therefore be considered during selection.

7. Dimensions 42x62x7 mm Explained

These are nominal dimensions.

Correct selection also requires consideration of shaft and housing tolerances, surface finish, installation edge geometry and the required sealing profile.

8. Operating Principle of a Double-Lip Oil Seal

During operation, the primary sealing lip maintains contact with the rotating shaft.

Under suitable lubrication conditions, the sealing interface helps restrict lubricant leakage while accommodating shaft rotation.

The additional dust lip helps limit the entry of external contaminants into the primary sealing area.

The dust exclusion lip must not automatically be considered a second independent oil-retaining lip.

Sealing effectiveness depends on:

• Shaft surface quality.

• Lubrication conditions.

• Operating temperature.

• Rotational speed.

• Correct installation.

• Seal material compatibility.

• Shaft alignment and runout.

The combined design supports lubricant retention and additional contamination protection in appropriately engineered mechanical assemblies.

9. Potential Industrial Applications

NBR TC radial shaft seals are commonly used in mechanical equipment incorporating rotating shafts.

Typical application categories for this seal design include:

• Mechanical gearboxes.

• Industrial drive assemblies.

• Oil-lubricated machinery.

• Selected bearing housings.

• Power transmission mechanisms.

• Production machinery.

• Equipment requiring lubricant retention and dust protection.

These are general application categories for the TC seal family and do not constitute a manufacturer-confirmed compatibility list for the specific product.

10. TC Compared with Other Oil Seal Profiles

Different profile designations do not necessarily establish interchangeability.

Before selecting an alternative, verify the seal body geometry, lip configuration, material, width and operating requirements.

11. Oil Seal 42x62x7 NBR TC - Selection Criteria

Correct selection requires verification of the following parameters:

Shaft Diameter

The nominal shaft diameter is 42 mm.

The shaft surface must be suitable for radial lip sealing.

Housing Bore

The nominal housing bore diameter is 62 mm.

Correct retention depends on housing geometry and dimensional accuracy.

Seal Width

The nominal width is 7 mm.

The available installation space must accommodate the specified seal geometry.

Seal Profile

The required profile is TC, corresponding to the AO designation in the stated product identification.

Material Compatibility

The sealing material is NBR.

Compatibility with the lubricant and its additives must be confirmed.

Operating Conditions

Shaft speed, temperature, pressure and lubrication conditions must be evaluated before installation.

A seal should not be selected solely because its three nominal dimensions match the original component.

12. Installation and Maintenance Recommendations

Before installation, clean the shaft and housing bore.

The shaft contact surface should be free from damage, deep scratches or excessive wear.

Recommended installation practices include:

• Using appropriate installation tools.

• Protecting the sealing lip from sharp edges.

• Avoiding seal tilting during insertion.

• Maintaining the correct orientation relative to the sealed medium.

• Preparing the sealing lip according to installation requirements.

• Avoiding dry operation where lubrication is required.

After commissioning, monitor the assembly for lubricant leakage and abnormal temperature development.

Correct installation and suitable operating conditions are essential for reliable sealing performance.

13. Frequently Asked Questions (FAQ)

1. What are the dimensions of Oil Seal 42x62x7 NBR TC?

The nominal inside diameter is 42 mm, the outside diameter is 62 mm and the width is 7 mm.

2. What does TC mean in an oil seal designation?

TC identifies a common double-lip radial shaft seal design incorporating a primary sealing lip and an additional dust exclusion lip.

3. Is Oil Seal 42x62x7 NBR TC a double-lip seal?

Yes. The TC designation identifies a double-lip configuration.

4. Is NBR resistant to oil?

NBR generally provides good resistance to many mineral oils. Compatibility with the specific lubricant must be verified.

5. Are AO and TC the same oil seal type?

AO and TC are frequently used for corresponding double-lip seal configurations. Exact interchangeability depends on manufacturer specifications.

6. Can Oil Seal 42x62x7 NBR TC operate under pressure?

The permissible operating pressure depends on the exact seal construction and application conditions. A safe pressure limit cannot be established without manufacturer documentation.

7. What is the operating temperature of an NBR oil seal?

Many standard NBR compounds have an approximate temperature range of -30°C to +100°C. This is not a verified rating for the specific product.

8. Can a TC oil seal be replaced with an SC oil seal?

Not automatically. SC is commonly a single-lip design and does not provide the same additional dust exclusion function as TC.

14. AI Quick Answer

Oil Seal 42x62x7 NBR TC is a double-lip radial shaft seal with a nominal inside diameter of 42 mm, outside diameter of 62 mm and width of 7 mm. Manufactured from nitrile butadiene rubber, it incorporates a primary sealing lip and an additional dust exclusion lip. The TC design is commonly used in rotating shaft assemblies with compatible lubricants.

15. B2B Industrial Supply - simmering.pl

Oil Seal 42x62x7 NBR TC - Double Lip Radial Shaft Seal is offered through simmering.pl, a specialist B2B industrial supply platform providing radial shaft oil seals, rolling bearings and industrial components.

The platform serves manufacturing companies, wholesale customers, industrial maintenance departments, engineers and technical procurement teams.

Technical product identification is supported by dimensions, sealing materials, construction profiles and operating requirements.

Warehouse operations are based in Lublin, Poland.

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