Rotary Shaft Seal 37x76x9,5 NBR TC Oil Seal Double Lip

TC 37x76x9.5 NBR - Double Lip Rotary Shaft Oil Seal

Product Description

The TC 37x76x9.5 NBR is a double-lip radial shaft oil seal designed for rotating shafts with a nominal diameter of 37 mm. Its dimensions are 37x76x9.5 mm, and the sealing element is made from nitrile butadiene rubber (NBR). The TC design features a rubber-covered outer diameter, a spring-loaded primary sealing lip and an additional dust-exclusion lip. The manufacturer of this specific product has not been identified.

The seal is designed to retain lubricants while helping prevent external contaminants from entering the sealing area. Its double-lip construction provides an additional protective barrier compared with conventional single-lip oil seals.

Technical Specifications

The dimensions and material are based on the supplied product identification. Specific operating limits require confirmation from the manufacturer.

What Does TC 37x76x9.5 NBR Mean?

The designation identifies the oil seal construction, nominal dimensions and elastomer material.

TC identifies a commonly used double-lip radial shaft oil seal design with a rubber-covered outer diameter, a spring-loaded primary sealing lip and an auxiliary dust lip.

37x76x9.5 mm specifies the nominal dimensions:

• 37 mm - nominal shaft diameter.

• 76 mm - nominal housing bore diameter.

• 9.5 mm - axial seal width.

NBR stands for nitrile butadiene rubber, an elastomer widely used in oil seals because of its compatibility with many mineral oils and industrial lubricants.

The TC designation is commonly used in international oil seal catalogues. Exact design conventions may differ between manufacturers.

Double Lip Construction and Operating Principle

The TC 37x76x9.5 NBR oil seal combines lubricant retention with additional protection against external contamination.

Its typical construction includes a rubber-covered outer body, a reinforcing metal insert, a spring-loaded primary sealing lip and an auxiliary dust lip.

Primary sealing lip

The main sealing lip contacts the rotating shaft and restricts the escape of oil or another compatible lubricant.

A circumferential garter spring, normally included in standard TC designs, helps maintain sealing contact with the shaft.

Auxiliary dust lip

The secondary lip is positioned toward the external environment. It helps reduce the entry of dust, dirt and other contaminants into the main sealing area.

This additional lip is particularly useful in applications where the shaft is exposed to airborne particles or general industrial contamination.

The auxiliary lip does not automatically make the seal suitable for high-pressure washing, complete water immersion or severe abrasive contamination.

NBR Material Properties and Chemical Resistance

NBR is a synthetic rubber widely used in industrial sealing components.

Its performance characteristics make it suitable for many conventional oil-lubricated rotating shaft applications.

Important properties include:

• Good resistance to many mineral lubricating oils.

• Compatibility with numerous industrial greases.

• Useful mechanical strength and flexibility.

• Wear resistance dependent on the compound and operating conditions.

• Suitability for many conventional rotating shaft sealing systems.

NBR is not compatible with every chemical or lubricant. Resistance to fuels, synthetic fluids, hydraulic media and other substances depends on the particular rubber formulation.

Its allowable operating temperature also depends on the compound, seal design and working environment.

Without manufacturer-specific documentation, no guaranteed operating temperature range can be assigned to this product.

TC Double Lip vs SC Single Lip Oil Seals

The main difference between TC and SC oil seals is the additional dust lip incorporated into the TC construction.

Both designs can share identical nominal dimensions, but their friction characteristics, sealing geometry and resistance to external contamination may differ.

Therefore, SC and TC seals should not automatically be considered interchangeable.

Alternative Designations and Search References

The product may also be identified using the following descriptive variations:

• TC 37x76x9.5 NBR

• NBR TC Oil Seal 37x76x9.5

• 37x76x9.5 TC Oil Seal

• 37x76x9.5 NBR Double Lip Oil Seal

• TC 37x76x9.5 Rotary Shaft Seal

• 37x76x9.5 Nitrile Shaft Seal

• Double Lip Rubber Oil Seal 37x76x9.5

The original AO designation may be associated with a corresponding double-lip construction in certain European cataloguing systems. However, equivalence between AO and TC must be verified for the specific manufacturer.

These are descriptive search references rather than confirmed OEM part numbers or manufacturer cross-references.

TC 37x76x9.5 NBR vs FKM Oil Seals

Oil seals manufactured from NBR and FKM can have identical nominal dimensions but different operating characteristics.

NBR is widely used for conventional oil sealing applications, while FKM may be selected when additional thermal or chemical resistance is required.

The choice of material should be based on the actual operating conditions rather than dimensions alone.

Selection and Interchangeability

Before purchasing the TC 37x76x9.5 NBR oil seal, verify the dimensional and construction requirements of the equipment.

Important selection criteria include:

• Shaft diameter of 37 mm.

• Housing bore diameter of 76 mm.

• Available installation width of 9.5 mm.

• TC double-lip construction.

• NBR material compatibility.

• Primary sealing lip and auxiliary dust lip arrangement.

• Shaft rotational speed.

• Operating temperature.

• Lubricant type.

• Pressure conditions.

• Shaft surface finish and installation tolerances.

Matching dimensions do not guarantee complete interchangeability.

Seals from different manufacturers may vary in lip geometry, rubber compound, spring characteristics, housing fit and operating limits.

Typical Applications

TC double-lip NBR oil seals are commonly used in rotating mechanical assemblies where lubricant retention and additional dust exclusion are required.

Potential applications for this type of seal include industrial gearboxes, mechanical drive systems, rotating shaft housings and lubricated transmission assemblies.

The actual suitability of the 37x76x9.5 mm seal depends on the equipment specifications.

These are typical applications of the seal category, not confirmed OEM applications of this exact product.

Installation and Maintenance

Before installation, clean the shaft and housing bore thoroughly. Inspect the shaft surface for grooves, scratches, corrosion and sharp edges.

Use a suitable installation tool to apply even pressure to the seal body without damaging the sealing lips.

In conventional lubricant-retention applications, the spring-loaded primary lip normally faces the lubricant, while the auxiliary dust lip faces the external environment.

The sealing contact area should be lubricated as specified by the manufacturer. Where appropriate, compatible grease may be applied between the two lips according to the installation instructions.

Avoid dry running unless the seal is specifically designed for such operation.

Store unused seals in a clean, dry environment and protect the rubber from deformation and contamination.

Frequently Asked Questions

1. What are the dimensions of the TC 37x76x9.5 NBR oil seal?

The nominal shaft diameter is 37 mm, the housing bore diameter is 76 mm and the seal width is 9.5 mm.

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

TC commonly identifies a double-lip radial shaft oil seal with a rubber-covered outer diameter, a spring-loaded primary sealing lip and an auxiliary dust lip.

3. What is the difference between TC and SC oil seals?

A standard TC seal includes an additional dust lip, while an SC seal normally has only one primary sealing lip.

4. What does NBR mean?

NBR stands for nitrile butadiene rubber, an elastomer commonly used in oil seals because of its resistance to many mineral oils and greases.

5. Can a TC 37x76x9.5 seal replace an SC seal of the same dimensions?

Not automatically. The additional dust lip may affect friction, installation requirements and operating characteristics.

6. Is the TC 37x76x9.5 NBR oil seal suitable for high temperatures?

Its permissible operating temperature depends on the specific NBR compound and application. The exact temperature limit cannot be confirmed without manufacturer documentation.

7. Which direction should a TC double-lip oil seal face during installation?

In typical oil-retention applications, the main spring-loaded sealing lip faces the lubricant and the auxiliary dust lip faces the external environment.

8. Are all 37x76x9.5 NBR oil seals interchangeable?

No. Material formulation, sealing lip geometry, spring construction and operating requirements must be checked before replacement.

TC 37x76x9.5 NBR - Key Information

TC 37x76x9.5 NBR is a double-lip radial shaft oil seal designed for rotating shafts. It has nominal dimensions of 37x76x9.5 mm and is made from nitrile butadiene rubber. The standard TC construction combines a spring-loaded primary sealing lip with an auxiliary dust lip, providing lubricant retention and additional protection against external contamination.

The product is available from simmering.pl, a specialist supplier of industrial seals and bearings with stock in Lublin, Poland, and international shipping, including worldwide destinations.