GRN® 140x160x12 NBR TC - Double Lip Radial Shaft Oil Seal

Product Description

GRN® 140x160x12 NBR TC is a double lip radial shaft oil seal (Simmerring) manufactured from nitrile butadiene rubber (NBR). Its nominal dimensions are 140x160x12 mm, with an inner diameter of 140 mm, an outer diameter of 160 mm and an axial width of 12 mm. The TC profile features a primary sealing lip and an additional dust exclusion lip, helping reduce lubricant leakage and contamination ingress into rotating mechanical assemblies.

The oil seal is designed for installation on a shaft with a nominal diameter of 140 mm and in a housing bore with a nominal diameter of 160 mm.

A distinctive dimensional characteristic of this seal is its relatively small radial cross-section height of 10 mm, despite the large shaft diameter.

This dimensional configuration is relevant when selecting a radial shaft oil seal for equipment with limited space between the shaft and housing.

The double lip construction combines lubricant retention with additional protection against dust, dirt and fine contaminants.

NBR is widely used in sealing applications involving many mineral oils and lubricating greases. However, compatibility with a specific operating medium, temperature and shaft surface speed must be verified for the intended application.

Technical Specifications - GRN® 140x160x12 NBR TC

The product identification and dimensions are based on the supplied designation. A verified GRN® manufacturer datasheet for this specific SKU is not available here. Therefore, unconfirmed operating temperature limits, permissible pressure, shaft surface speed, elastomer hardness and specific spring construction details are not assigned to this product.

GRN® 140x160x12 Oil Seal Dimensions

The designation 140x160x12 mm specifies:

• Shaft diameter: 140 mm.

• Housing bore diameter: 160 mm.

• Oil seal width: 12 mm.

The nominal radial cross-section height is 10 mm.

For a shaft with a nominal diameter of 140 mm, the seal requires a housing bore with a nominal diameter of 160 mm.

The specified dimensions are nominal values. Actual shaft, housing and seal tolerances must comply with the relevant technical requirements and equipment documentation.

What Does GRN® 140x160x12 NBR TC Mean?

GRN® - Product Brand

GRN® is a brand of technical sealing components, including radial shaft oil seals and O-rings.

140x160x12 - Nominal Dimensions

The three values identify:

• 140 mm - inner diameter.

• 160 mm - outer diameter.

• 12 mm - axial width.

NBR - Sealing Material

NBR stands for Nitrile Butadiene Rubber, a synthetic elastomer commonly used in seals operating with many mineral oils and technical lubricating greases.

TC - Double Lip Sealing Profile

The TC designation identifies a double lip construction consisting of:

• A primary sealing lip responsible for lubricant retention.

• An additional dust exclusion lip designed to limit contamination ingress.

Typical TC oil seals also feature a spring-loaded primary sealing lip, internal metal reinforcement and a rubber-covered outer diameter.

The exact construction of this particular GRN® oil seal should be confirmed using the manufacturer's technical documentation.

Construction and Operating Principle

Primary Sealing Lip

The primary sealing lip operates directly against the rotating surface of a shaft with a nominal diameter of 140 mm.

A dynamic sealing interface is formed at the contact area, helping prevent oil or grease from escaping the mechanical assembly.

Proper sealing performance depends on shaft surface condition, lubrication, surface speed, lip geometry and elastomer properties.

Additional Dust Exclusion Lip

The secondary lip provides an additional barrier against dust and fine particles entering the main sealing area.

Its function is to reduce contamination of the primary sealing interface.

However, the additional lip does not automatically provide protection against pressurized water or intensive washing.

Oil Seal Body

In typical TC constructions, internal metal reinforcement helps stabilize the seal body, while the rubber-covered outer surface supports static sealing between the seal and housing bore.

The precise body construction of the GRN® 140x160x12 oil seal requires manufacturer confirmation.

NBR Material - Properties and Limitations

Nitrile Butadiene Rubber is one of the most commonly used elastomers in radial shaft oil seals.

Its relevant characteristics include:

• Good resistance to many mineral oils.

• Compatibility with numerous mineral oil-based lubricating greases.

• Elasticity required for dynamic shaft sealing.

• Suitability for appropriately designed rotating mechanical assemblies.

NBR resistance depends on the composition of the particular elastomer compound and the properties of the operating medium.

Compatibility with all synthetic oils, fuels, solvents or chemicals must not be assumed solely from the NBR designation.

Likewise, a universal operating temperature range should not be assigned to every NBR oil seal. Actual operating limits require confirmation for the specific product.

GRN® 140x160x12 Compared with Other Oil Seal Dimensions

When selecting a replacement oil seal, products with identical shaft diameters but different outer diameters or widths must be distinguished.

All three dimensions correspond to a nominal shaft diameter of 140 mm, but they require different housing bore diameters.

A 140x165x12 mm oil seal is not a direct dimensional replacement for a 140x160x12 mm oil seal, because its outer diameter is 5 mm larger.

Similarly, a 140x180x15 mm oil seal is not a direct replacement. Its outer diameter is 20 mm larger and its axial width is 3 mm greater.

Alternative Designations and Search References

Natural variations of the product designation include:

• GRN® 140x160x12 NBR TC

• 140x160x12 NBR TC GRN®

• GRN® 140x160x12 Simmerring

• GRN® 140x160x12 NBR double lip oil seal

• 140x160x12 TC radial shaft oil seal GRN®

These are alternative ways of identifying the stated product, not verified catalogue numbers from other manufacturers.

No unverified OEM references or cross-reference numbers have been assigned.

Oil Seal Selection and Interchangeability

Before purchasing, verify the following:

1. Shaft diameter: nominally 140 mm.

2. Housing bore diameter: nominally 160 mm.

3. Axial width: 12 mm.

4. Sealing profile: double lip TC.

5. Material: NBR compatible with the operating medium.

6. Shaft surface: condition, roughness and potential wear grooves.

7. Shaft surface speed: compatibility with permissible operating limits.

8. Temperature: actual temperature at the sealing contact area.

9. Pressure: compatibility with conditions inside the housing.

10. Contamination: dust exposure and presence of moisture.

11. Seal construction: compatibility with the equipment requirements.

Importance of Shaft Surface Speed for a 140 mm Shaft

For large-diameter shafts, even moderate rotational speeds may result in significant surface speeds at the sealing lip.

Shaft surface speed can be calculated using:

Where:

• v - shaft surface speed in m/s.

• d - shaft diameter in mm.

• n - rotational speed in rpm.

For a shaft diameter of 140 mm, the calculated values are:

These values are mathematical calculations based only on shaft diameter and rotational speed.

They do not represent verified permissible operating speeds for the GRN® 140x160x12 NBR TC oil seal.

Typical Applications of TC Double Lip Radial Shaft Oil Seals

TC radial shaft oil seals are used in appropriately designed rotating mechanical assemblies where lubricant retention and additional protection against contamination are required.

General application categories for this type of sealing construction include:

• Industrial gearboxes.

• Mechanical drive systems.

• Bearing housings.

• Rotating industrial machinery.

These are typical applications of the sealing design, not verified OEM applications of the specific GRN® 140x160x12 NBR TC product.

Suitability for a particular machine depends on dimensions, shaft surface speed, temperature, operating medium, pressure and mechanical design requirements.

Installation and Operating Recommendations

Before installation, clean the shaft and housing bore and inspect both surfaces for damage.

The oil seal should be installed evenly using a suitable tool that applies force to the appropriate area of the seal body. Installation force must not be transmitted through the sealing lips.

In typical applications, the primary sealing lip should face the retained oil or grease, while the dust exclusion lip faces the external environment. The final installation orientation must follow the equipment manufacturer's instructions.

Before initial operation, ensure appropriate lubrication of the sealing lip contact area. For double lip constructions, lubrication requirements between the two lips should also be considered.

Store the oil seal in a clean, dry environment protected from direct sunlight, ozone, excessive heat and deformation.

Frequently Asked Questions - GRN® 140x160x12 NBR TC

1. What are the dimensions of the GRN® 140x160x12 oil seal?

The inner diameter is 140 mm, the outer diameter is 160 mm and the axial width is 12 mm. The nominal radial cross-section height is 10 mm.

2. What does TC mean in the 140x160x12 oil seal designation?

TC identifies a double lip sealing profile with a primary sealing lip and an additional dust exclusion lip.

3. Is the GRN® 140x160x12 a double lip oil seal?

Yes. Its designation specifies a double lip construction intended to retain lubricant and limit contamination ingress.

4. Is NBR suitable for sealing mineral oil?

NBR offers good resistance to many mineral oils and greases. Compatibility with a specific lubricant, chemical additives and operating temperature should be verified before use.

5. Can a 140x165x12 oil seal replace a 140x160x12 oil seal?

Not as a direct dimensional replacement. The 140x165x12 seal has an outer diameter that is 5 mm larger and requires a different housing bore.

6. Can the GRN® 140x160x12 oil seal operate at 1500 rpm?

At 1500 rpm, a shaft with a diameter of 140 mm has a calculated surface speed of approximately 11.00 m/s. This does not confirm that the oil seal is suitable for this operating speed. The product's permissible limits, lubrication conditions and temperature must be verified.

7. Is an oil seal from another manufacturer with the same dimensions interchangeable?

It may be interchangeable if the sealing profile, material, seal body construction, lip arrangement and operating limits are compatible. Identical dimensions alone do not guarantee full interchangeability.

8. How should the GRN® 140x160x12 double lip oil seal be installed?

Inspect and clean the shaft and housing, install the seal evenly without misalignment, and ensure correct lip orientation and lubrication according to the equipment requirements.

GRN® 140x160x12 NBR TC - Key Information

GRN® 140x160x12 NBR TC is a double lip radial shaft oil seal with a 140 mm inner diameter, 160 mm outer diameter and 12 mm width. Manufactured from nitrile butadiene rubber, it features a primary sealing lip and an additional dust exclusion lip. Its nominal radial cross-section height is 10 mm, supporting lubricant retention and contamination protection.

The GRN® 140x160x12 NBR TC oil seal is offered by simmering.pl, a specialist supplier of radial shaft oil seals, O-rings and bearings with a warehouse in Lublin, Poland. The company serves industrial and individual customers in Poland, the European Union and international markets.