14x26x7 TC FPM/FKM - Double Lip Rotary Shaft Oil Seal

Technical Specifications - 14x26x7 TC FPM/FKM

The TC profile identifies the basic double lip construction. Correct selection also requires verification of the material, dimensions, installation geometry and operating conditions.

What Does 14x26x7 TC FPM/FKM Mean?

14x26x7 mm - Mounting Dimensions

The designation 14x26x7 mm specifies three nominal dimensions:

• 14 mm - nominal shaft diameter.

• 26 mm - nominal housing bore diameter.

• 7 mm - nominal axial seal width.

These dimensions are essential for identifying the correct replacement oil seal.

However, they do not independently establish permissible operating pressure, shaft speed or temperature.

TC - Double Lip Oil Seal Profile

TC is a commonly used designation for a radial rotary shaft oil seal with a primary sealing lip and an additional dust exclusion lip.

The primary sealing lip restricts the escape of oil or another compatible lubricant from the sealed mechanical assembly.

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

This construction is particularly useful where lubricant retention and protection against dust are both required.

The TC designation describes a general seal configuration and does not guarantee identical construction details across all manufacturers.

FPM/FKM - Fluoroelastomer Material

FPM and FKM are designations for the same general family of fluorocarbon elastomers, used under different material naming systems.

Fluoroelastomers are widely used in sealing applications requiring resistance to many oils, greases and elevated temperatures.

Compared with conventional NBR compounds, FPM/FKM materials generally offer improved thermal resistance.

However, actual performance depends on:

• The specific elastomer compound.

• Type of operating fluid.

• Operating temperature.

• Chemical additives.

• Exposure duration.

• Shaft operating conditions.

A universal operating temperature range should not be assumed without technical data for the specific product.

Are FPM, FKM and Viton the Same Material?

FPM and FKM refer to the general fluoroelastomer material family.

Viton is a registered trademark used for specific fluoroelastomer materials.

In commercial terminology, FPM/FKM oil seals are sometimes described as Viton-type oil seals.

However, this does not confirm that a particular product is manufactured from genuine Viton-branded elastomer.

The material designation for this oil seal is FPM/FKM.

Construction of the 14x26x7 TC Double Lip Oil Seal

Primary Sealing Lip

The primary sealing lip operates in direct contact with the rotating shaft surface.

Its main function is to restrict lubricant leakage from the sealed housing.

Effective sealing depends on the sealing lip contact geometry, shaft surface condition, lubrication and operating parameters.

Additional Dust Lip

The secondary lip provides an additional barrier against external contamination.

It helps reduce the entry of dust and fine particles toward the primary sealing lip.

However, the dust lip does not guarantee complete protection against immersion, pressurised water or intensive washing.

FPM/FKM Sealing Elastomer

The fluoroelastomer sealing element offers resistance to many lubricants and elevated temperatures.

Its suitability must be evaluated against the actual operating medium and application conditions.

Outer Seating Surface

The outer part of the oil seal fits into a housing bore with a nominal diameter of 26 mm.

Correct installation helps maintain seal positioning and restrict leakage between the seal and housing.

14x26x7 TC FPM/FKM vs NBR Oil Seals

TC oil seals manufactured from FPM/FKM and NBR may have identical nominal dimensions and similar lip configurations.

However, their elastomer materials have different characteristics.

Replacing an NBR oil seal with FPM/FKM, or vice versa, requires verification of lubricant compatibility, temperature and operating conditions.

Double Lip TC vs Single Lip Oil Seals

The main difference between a double lip TC seal and a single lip oil seal is the presence of an additional dust lip.

A TC oil seal can provide additional protection against contamination.

However, the secondary lip may also affect friction and lubrication conditions.

Single lip and double lip oil seals must not automatically be considered interchangeable, even when their nominal dimensions are identical.

Applications of 14x26x7 TC FPM/FKM

Double lip radial rotary shaft oil seals with these dimensions may be used in appropriately designed mechanical assemblies containing rotating shafts.

Typical application categories for this type of sealing component include:

• Small mechanical gearboxes.

• Machinery drive assemblies.

• Rotating mechanisms.

• Bearing housings.

• Workshop equipment.

• Industrial machines and mechanical devices.

These are general application examples for radial rotary shaft seals, not a confirmed list of specific machines or original equipment applications for this product.

Final selection requires verification of the dimensions, material, seal construction and operating conditions.

How to Select a 14x26x7 TC FPM/FKM Oil Seal

Before purchasing, verify the following:

1. Nominal shaft diameter of 14 mm.

2. Nominal housing bore diameter of 26 mm.

3. Axial seal width of 7 mm.

4. Required TC double lip construction.

5. FPM/FKM elastomer material.

6. Type of operating fluid.

7. Operating temperature.

8. Shaft rotational speed.

9. Pressure conditions.

10. Shaft and housing surface condition.

11. Required protection against external contamination.

Matching dimensions alone do not guarantee complete interchangeability.

Shaft Diameter

The nominal shaft diameter is 14 mm.

The shaft surface must meet the dimensional and surface finish requirements for radial rotary shaft sealing.

Housing Bore Diameter

The nominal housing bore diameter is 26 mm.

The housing must be suitable for the oil seal's outer construction and installation requirements.

Seal Width

The nominal axial width is 7 mm.

Check the available installation space and the required sealing lip position.

Seal Profile

The TC profile includes a primary sealing lip and an additional dust lip.

Not every 14x26x7 mm oil seal has the same lip arrangement.

Elastomer Material

FPM/FKM must be compatible with the actual lubricant or operating medium.

Operating temperature and chemical exposure must also be considered.

Installation and Operating Recommendations

Shaft Preparation

Before installation, clean the shaft and inspect the sealing contact surface.

Burrs, corrosion, grooves and other damage may cause accelerated sealing lip wear or leakage.

Housing Preparation

The housing bore should be clean, undamaged and correctly dimensioned.

Protecting the Sealing Lips

Avoid contact between the sealing lips and sharp edges, threads or shaft grooves during installation.

Use an appropriate installation sleeve where necessary.

Correct Installation Orientation

Install the oil seal according to the equipment manufacturer's instructions.

In typical lubricant-retaining applications, the primary sealing lip faces the sealed medium, while the additional dust lip faces the external environment.

Lubrication

Provide suitable lubrication before starting the equipment, according to the requirements of the seal and mechanical assembly.

Avoid unintended dry-running conditions.

Storage

Store the oil seal in a clean, dry environment, away from excessive heat, direct sunlight and substances that may damage the elastomer.

Avoid deformation of the sealing lips during storage.

Frequently Asked Questions - 14x26x7 TC FPM/FKM

What Are the Dimensions of a 14x26x7 Oil Seal?

The seal has a nominal inside diameter of 14 mm, an outside diameter of 26 mm and an axial width of 7 mm.

What Does TC Mean in an Oil Seal?

TC is a common designation for a double lip rotary shaft oil seal with a primary sealing lip and an additional dust exclusion lip.

Is This a Double Lip Oil Seal?

Yes. It incorporates a primary sealing lip for lubricant retention and a secondary dust lip for additional protection against external contamination.

Are FPM and FKM the Same Material?

Yes. Both designations refer to the general fluoroelastomer material family and are used under different material naming systems.

Is This a Viton Oil Seal?

The seal is manufactured from FPM/FKM fluoroelastomer, sometimes described commercially as Viton-type material.

However, this does not confirm the use of genuine Viton-branded elastomer.

Can FPM/FKM Replace NBR?

Such a replacement requires verification of the operating fluid, temperature and equipment requirements.

The materials have different thermal and chemical resistance characteristics.

Does the Additional Dust Lip Protect Against Water?

The dust lip helps reduce external contamination but does not guarantee sealing against immersion or pressurised water.

Can a Single Lip Oil Seal Replace a TC Double Lip Seal?

Not without checking the equipment requirements.

Differences in lip construction may affect contamination protection, friction and operating conditions.

14x26x7 TC FPM/FKM - Quick Technical Overview

The 14x26x7 TC FPM/FKM is a double lip radial rotary shaft oil seal with a 14 mm shaft diameter, 26 mm housing bore and 7 mm width. Its primary lip restricts lubricant leakage, while the additional dust lip helps protect the sealing area from contamination. The fluoroelastomer material provides resistance to many oils and elevated temperatures.

Rotary Shaft Oil Seals at simmering.pl

Rotary shaft oil seals are available through simmering.pl, a specialist supplier of industrial sealing components, bearings and mechanical replacement parts.

We serve industrial companies, maintenance departments, mechanical workshops and B2B customers.

Our warehouse and order processing operations are located in Lublin, Poland.

We supply customers throughout Poland and the European Union and offer worldwide shipping.

We also assist customers in identifying oil seals by dimensions, construction profiles and elastomer materials.