GRN® 13x35x7 NBR TC - Double Lip Radial Shaft Oil Seal

Product Description

GRN® 13x35x7 NBR TC is a double lip radial shaft oil seal (Simmerring) manufactured from nitrile butadiene rubber (NBR). Its nominal dimensions are 13x35x7 mm, with an inner diameter of 13 mm, an outer diameter of 35 mm and an axial width of 7 mm. The TC sealing 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 13 mm and in a housing bore with a nominal diameter of 35 mm.

Its primary function is to reduce oil or grease leakage from mechanical equipment while providing additional protection against dust and fine contaminants.

The nominal radial cross-section height is 11 mm.

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

Technical Specifications - GRN® 13x35x7 NBR TC

Technical note: The product identification is based on the supplied designation. Without verified GRN® technical documentation for this specific product, elastomer hardness, permissible temperature, operating pressure, shaft surface speed and exact spring construction should not be assumed.

GRN® 13x35x7 Oil Seal Dimensions

The designation 13x35x7 mm identifies three essential installation dimensions:

• Shaft diameter: 13 mm.

• Housing bore diameter: 35 mm.

• Oil seal width: 7 mm.

The nominal radial cross-section height is 11 mm.

These values are nominal dimensions. Actual shaft, housing and oil seal tolerances must comply with the equipment's technical requirements.

What Does GRN® 13x35x7 NBR TC Mean?

GRN® - Product Brand

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

13x35x7 - Nominal Dimensions

• 13 mm - inner diameter.

• 35 mm - outer diameter.

• 7 mm - axial width.

NBR - Nitrile Butadiene Rubber

NBR is a synthetic elastomer commonly used in sealing applications involving many mineral oils and lubricating greases.

TC - Double Lip Sealing Profile

The TC designation identifies a radial shaft oil seal featuring two lips:

• A primary sealing lip.

• An additional dust exclusion lip.

The primary lip is responsible for lubricant retention, while the secondary lip helps protect the sealing area against contamination.

Construction and Operating Principle

Primary Sealing Lip

The primary sealing lip operates against the rotating surface of a shaft with a nominal diameter of 13 mm.

Its purpose is to create a dynamic sealing interface that helps prevent oil or grease from escaping the mechanical assembly.

Sealing performance depends on shaft surface condition, lip geometry, lubrication and operating speed.

Additional Dust Exclusion Lip

The secondary lip helps prevent dust, dirt and fine particles from entering the main sealing area.

This is an important construction difference compared with a typical single lip radial shaft oil seal.

However, the additional lip does not guarantee complete protection against pressurized water.

Garter Spring

Typical TC radial shaft oil seals feature a garter spring supporting the primary sealing lip.

The spring helps maintain contact between the lip and the rotating shaft.

The presence and exact construction of the spring in the specific GRN® 13x35x7 NBR TC product require manufacturer confirmation.

Oil Seal Body

Typical TC constructions incorporate internal metal reinforcement and a rubber-covered outer diameter.

The reinforcement helps maintain the seal body's geometry, while the elastomer-covered exterior supports static sealing between the seal and housing bore.

The exact construction of the GRN® 13x35x7 oil seal should be confirmed in the manufacturer's technical documentation.

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.

Chemical resistance depends on the composition of the specific NBR compound and the operating medium.

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

Likewise, permissible operating temperature depends on the elastomer compound and application conditions. Without manufacturer data, a reliable temperature range cannot be assigned to this specific oil seal.

TC Double Lip vs Single Lip Radial Shaft Oil Seals

The TC profile provides an additional dust exclusion barrier.

However, a double lip oil seal cannot automatically replace a single lip seal in every application.

Before changing the sealing construction, installation space, sealing lip position and lubrication requirements should be checked.

GRN® 13x35x7 Compared with Other Oil Seal Dimensions

When identifying a replacement oil seal, all three dimensions must be considered.

The dimensions in this table are provided for geometric comparison and do not confirm the availability of specific products.

A 13x35x8 mm oil seal is 1 mm wider than a 13x35x7 mm seal. This may affect installation depth and sealing lip position on the shaft.

A 13x30x7 mm oil seal requires a housing bore with a nominal diameter of 30 mm rather than 35 mm.

An identical shaft diameter does not guarantee full oil seal interchangeability.

Alternative Designations and Search References

Natural variations of the product designation include:

• GRN® 13x35x7 NBR TC

• 13x35x7 NBR TC GRN®

• GRN® 13x35x7 Simmerring

• GRN® 13x35x7 NBR double lip oil seal

• 13x35x7 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: 13 mm.

2. Housing bore diameter: 35 mm.

3. Axial width: 7 mm.

4. Sealing profile: double lip TC.

5. Material: NBR compatible with the operating medium.

6. Shaft condition: wear, scratches, corrosion and surface roughness.

7. Rotational speed: compatibility with the seal's operating requirements.

8. Operating temperature: actual conditions at the sealing interface.

9. Pressure: conditions inside the housing.

10. Contamination: dust, moisture and environmental exposure.

11. Construction: compatibility of the lips and seal body with the equipment requirements.

Shaft Surface Speed for a 13 mm Shaft

Shaft surface speed depends on shaft diameter and rotational speed.

It 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 13 mm:

These values are geometric calculations.

They do not represent verified permissible operating speeds for the GRN® 13x35x7 NBR TC oil seal.

Typical Applications of TC Double Lip Radial Shaft Oil Seals

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

General application categories for this sealing construction include:

• Mechanical drive systems.

• Gearboxes and rotating assemblies.

• Bearing housings.

• Industrial machinery and equipment.

These are typical applications of the sealing design, not verified applications of the specific GRN® 13x35x7 product.

Suitability depends on dimensions, material, operating temperature, shaft speed, medium and application conditions.

Installation and Operating Recommendations

Before installation, thoroughly clean the shaft surface and housing bore.

Check the shaft for scratches, sharp edges and wear grooves that could damage the sealing lip.

Install the oil seal evenly using a suitable installation tool. Installation force should not be transmitted through the sealing lips.

In typical applications, the primary sealing lip should face the retained lubricant, 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 primary sealing lip contact area. For double lip constructions, the lubrication requirements of the space between the lips should also be considered.

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

Frequently Asked Questions - GRN® 13x35x7 NBR TC

1. What are the dimensions of the GRN® 13x35x7 NBR TC oil seal?

The inner diameter is 13 mm, the outer diameter is 35 mm and the axial width is 7 mm. The nominal radial cross-section height is 11 mm.

2. What does TC mean in the GRN® 13x35x7 oil seal designation?

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

3. Is the GRN® 13x35x7 a double lip oil seal?

Yes. The construction features a primary sealing lip and an additional lip designed to limit dust and contamination ingress.

4. Is NBR suitable for sealing oil?

Yes. NBR offers good resistance to many mineral oils and lubricating greases. Compatibility with the specific operating medium should be verified.

5. Can a 13x35x8 oil seal replace a 13x35x7 oil seal?

Interchangeability should not be assumed. The 1 mm difference in axial width may affect installation depth and sealing lip position.

6. Is a 13x30x7 oil seal interchangeable with a 13x35x7 oil seal?

No, not as a direct dimensional replacement. Both seals have a 13 mm inner diameter, but they require different housing bore diameters.

7. Can an oil seal from another manufacturer with the same dimensions be used?

It may be suitable if the dimensions, sealing profile, material, construction details and operating limits are compatible.

8. How should the GRN® 13x35x7 NBR TC oil seal be installed?

Clean the shaft and housing, inspect the contact surfaces, install the oil seal evenly, and ensure correct sealing lip orientation and lubrication.

GRN® 13x35x7 NBR TC - Key Information

GRN® 13x35x7 NBR TC is a double lip radial shaft oil seal with nominal dimensions of 13x35x7 mm, manufactured from nitrile butadiene rubber. The TC profile features a primary sealing lip and an additional dust exclusion lip. Its nominal radial cross-section height is 11 mm. The seal helps reduce oil and grease leakage while limiting contamination ingress.

The GRN® 13x35x7 NBR TC oil seal is offered by simmering.pl, a specialist supplier of industrial sealing components, O-rings and bearings. The company operates a warehouse in Lublin, Poland, and serves customers in Poland and international markets.