How FKL protects bearings against dirt and moisture, and what each prefix and suffix in a product designation means.
Seals for bearing arrangements are used to prevent solid contaminants and moisture from penetrating into the bearing and at the same time to retain the lubricant in the bearing or bearing arrangement.
Many factors have to be considered when selecting the most suitable form of sealing for a particular bearing arrangement.
Due to the strategic orientation of FKL on the agricultural application of bearings and bearing units where bearings operate in very harsh conditions, the first and main choice of FKL is the use of Integral bearing sealing.
It is an economic and space-saving solution. The bearings have shields or seals at one or both sides; those which are sealed at both sides are supplied with grease and are generally maintenance-free. Sealed bearings are generally used for arrangements where a sufficiently effective external seal cannot be provided, due to inadequate space or for cost reasons. Bearings fitted with shields are used where contamination is not heavy and where there is no danger of water, steam, etc. coming into contact with the bearing, or where the freedom of friction of these non-contact seals is important because of the speed or operating temperature of the bearing. Bearing fitted with contact seals is preferred where contamination is moderate and where dampness, water, steam, etc. may occur, or where a long service life without maintenance is required.
Single lip seal that prevents the penetration of the soil, dust and water, and it is exposed to the impact of the abrasive particles. Due to extended friction, the permitted speeds are lower. It is mostly replaced with the improved version of sealing (S).
Single lip seal with the labyrinth between the sheet part and the rubber lip which conducts the contact sealing. The friction and speeds are the same as with RS but provide much better protection against the rough impurity particles. This is a very good sealing system: the sheet part protects the seal from soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The rubber part provides contact sealing which prevents penetration of finer impurities, water, moisture, steam, etc. Suitable for neutral conditions because of the presence of the foreign materials. It is used with the Y bearing (standard) and deep groove ball bearings.
Dual sealing, a protection cover placed on the inner ring protects against rough impurity particles and makes the labyrinth with the sheet part of the seal; then the sealing S type, with the labyrinth between the sheet part and the rubber lip that conducts the contact sealing. The friction and speeds are the same as with S but have much better protection against rough impurity particles. It is a very good sealing system: the sheet part protects the seal from soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The rubber part provides contact sealing that prevents the penetration of the finer impurities, water, moisture, steam, etc. Suitable for heavier conditions due to better protection against foreign matters. It is used with the Y bearings (standard).
The double lip seal provides twice as good a seal as the S seal, while the maximum permitted rotational speed is adequately lower, due to the greater friction of the rubber lips against the steel inner ring. However, this rotational speed may be higher than with a 3-lip seal, up to 1500rpm. The sheet metal part protects the seal from soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The main area of application of bearings with such sealing is agricultural and construction machines at installation places where the rotational speed is up to 1500 rpm.
The construction is similar to S-seal, except the rubber lip is tripled. Therefore, it seals better but has even larger friction. The permitted speeds are much lower, up to 500 rpm. It emerges out of external ring width and is applied only with special bearings for the agricultural machines (practically standard sealing for the disc harrow bearings) and to a less extent, Y - bearing program (delivery is made according to special request).
Dual sealing: strong metal flinger placed on the inner ring protects against rough impurity particles; then the sealing T type with the labyrinth between the sheet part and the triple rubber lips that conducts the contact sealing. Friction and speed are the same as T seal has, but considerably better protection against rough dirt. This type of sealing is applied on special bearings for agricultural machines.
By construction is similar to T, except the rubber lip is fivefold. Therefore, it seals better but has even larger friction. The permitted speeds are much lower, up to 500 rpm. It emerges out of external ring width and is applied only with special bearings for the agricultural machines (practically standard sealing for the disc harrow bearings) and to a less extent, Y - bearing program (delivery is made according to special request).
Dual sealing: strong metal flinger placed on the inner ring protects against rough impurity particles; then the sealing P type with the labyrinth between the sheet part and the five rubber lips that conducts the contact sealing. Friction and speed are the same as T seal has, but considerably better protection against rough dirt. This type of sealing is applied on special bearings for agricultural machines.
An additional metal cover with a thickness of 1mm provides reliable mechanical protection.A unique combination of double triple-lip seals protects the bearing from the outer side and inner side as well. This seal presents one of the best sealing systems for application in agriculture.
The cassette seal is a two-part seal with 2 lips, which provides excellent protection against contamination and low friction. Therefore, bearings with this type of sealing can be used for high-speed applications.
The dirtblock seal design has been optimized to provide excellent retention of the grease and maximum protection against solid and liquid contaminants. It is a perfect choice of sealing for heavy duty applications in harsh environments and tough operating conditions.
RS seal on the base side and 3-lip seal on the front side which is exposed to contaminants.
RS seal on the base side prevents grease from leaking out of the bearing, while the 3-lip seal also protects the bearing from the penetration of contaminants.
O-ring and S seal on the base side of the flange and 3-lip seal on the front side which is exposed to contaminants.
O-ring and S seal on the base side together with the disc prevent penetration of all types of contaminants into the bearing, as well the 3-lip seal on the front side protects the bearing from contaminant penetration.
Sheet metal shield and S seal on the base side and 3-lip seal on the front side.
A Sheet metal shield and S seal on the base side prevent penetration of all types of contaminants into the bearing, as well a 3-lip seal on the front side protects the bearing from contaminant penetration.
3-lip seal on the base side and the RS seal with metal protective cap on the front side.
3- lip seal on the base side also protected with attached disc, protecting the bearing from contamination.
The RS seal with a Metal protective cap on the front side eliminates bearing contaminants.
3-lip seal on the base side and the S seal with Metal protective cap on the front side.
3-lip seal on the base side also protected with attached disc, protecting the bearing from contamination.
S seal with a Metal protective cap on the front side eliminates bearing contaminants.
Sheet metal shield and S seal on the base side and 3-lip seal with Steel plate on the front side which is exposed to contaminants.
Sheet metal shield and S seal together with attached disc eliminates the possibility of contamination from the base side.
The 3-lip seal on the front side protects the bearing from contaminant penetration. The Steel plate protects the seal from mechanical damage.
S seal on the base side and double 3-lip seal on the front side which is exposed to contaminants.
S seal on the base side prevents grease from leaking out of the bearing, while the double 3-lip seal gives the better protection than the single 3-lip seal. Steel shield is additional, strong protection of the double 3-lip seal against mechanical damage.
O-ring with Sheet metal shield and S seal on the base side and the double 3-lip seal with Steel shield on the front side.
O-ring with Sheet metal shield and S seal on the base side completely excludes all contaminants.
Double 3-lip seal protects the front side mauch longer than the just comaparing to the regular one 3-lip seal. Steel shield is additional, strong protection of the double 3-lip seal against mechanical damage.
Sheet metal shield and S seal on the base side and the S seal reinforced with frontal 3-lip seal and Metal protective cover on the front side, which is exposed to the contaminants.
Sheet metal shield and S seal together with attached disc reduce the possibility of contamination from the base side.
The S seal in combination with the frontal 3-lip seal provides better protection of contamination and extend the bearing life. The Metal protective cover of the frontal 3-lip seal also protect the inner 3-lip seal from mechanical damages.
O-ring, Sheet metal shield and RS seal on the base side and the 3-lip seal, reinforced with frontal 3-lip seal and Metal protective cover on the front side, which is exposed to the contaminants.
O-ring, Sheet metal shield and RS seal together with attached disc eliminates the possibility of contamination from the base side.
The 3-lip seal in combination with the frontal 3-lip seal provides better protection of contamination and extend the bearing life. The Metal protective cover of the frontal 3-lip seal also protect the inner 3-lip seal from mechanical damages.
O-ring, Sheet metal shield and S seal on the base side and Dirtblock seal on the front side which is exposed to contaminants.
O-ring, Sheet metal shield and S seal together with attached special disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
O-ring and RS seal on the base side and RS seal, Dirtblock seal and Forged cover plate on the front side which is exposed to contaminants.
O-ring and RS seal together with attached special disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working conditions at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
O-ring and RS seal on the base side and RS seal, Dirtblock seal and Forged cover plate on the front side which is exposed to contaminants.
O-ring and RS seal together with attached special disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working conditions at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
Sheet metal shield and RS seal on the base side and RS seal, Dirtblock seal and Forged cover plate on the front side which is exposed to contaminants.
Sheet metal shield and RS seal together with attached special disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working conditions at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
Sheet metal shield and S seal on the base side and S seal and Dirtblock seal on the front side which is exposed to contaminants.
Sheet metal shield and S seal together with attached disc eliminates the possibility of contamination from the flange side.
Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
Sheet metal shield and RS seal on the base side and Dirtblock seal and Forged cover plate on the front side which is exposed to contaminants.
Sheet metal shield and RS seal together with attached disc eliminates the possibility of contamination from the base side. Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
Dirtblock seal and Forged cover plate on the base side and Sheet metal shield with RS seal on the front side.
Dirtblock seal and Forged cover significantly slows down the contamination.
Sheet metal shield also protects the bearing from mechanical damages.
O-ring, Sheet metal shield and RS seal on the base side and Dirtblock seal with Forged cover plate on the front side which is exposed to contaminants.
O-ring, Sheet metal shield and RS seal together with attached disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
Plastic cover and RS seal on the base side and RS seal, Dirtblock seal and Forged cover plate on the front side which is exposed to contaminants.
Plastic cover and RS seal together with attached disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working conditions at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
O-ring, Sheet metal shield and RS seal on the base side and RS seal, Dirtblock seal with Forged cover plate on the front side which is exposed to contaminants.
O-ring, Sheet metal shield and RS seal together with attached disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
O-ring, Sheet metal shield and S seal on the base side and S seal, Dirtblock seal with Forged cover plate on the front side which is exposed to contaminants.
O-ring, Sheet metal shield and S seal together with attached disc eliminates the possibility of contamination from the base side.
Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. Forged cover plate is additional, strong protection of the Dirtblock seal against mechanical damage.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
RS seal and dirtblock seal with cover plate on both sides provide equal protection against contaminants. Dirtblock seal is designed for hard working condition at unfriendly environment. Half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life. The Cover plate protect the Dirtblock seal from mechanical damage.
3-lip seal on the front side which is exposed to contaminants, while the base side is open to the lubricant.
The older type of the single seal. Prevents penetration of soil, dust and water and since exposed to the impact of abrasive particles is expendable more than some new types of seals. Due to extended friction, the permitted speeds are lower. It was gradually replaced with the improved versions of S. Because of the traditional reasons Y bearings with this kind of seal do not have the additional sealing mark. It is used with the Y-bearings and deep groove ball bearings.
Single lip seal with the labyrinth between the sheet part and the rubber lip which conducts the contact sealing. The friction and speeds are the same as with RS but provides much better protection against the rough impurity particles. This is very good sealing system: the sheet part protects the seal from the soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The rubber part provides contact sealing which prevents penetration of finer impurities, water, moisture, steam etc. Suitable for neutral conditions because of the presence of the foreign materials. It is used with the Y bearing (standard) and deep groove ball bearings.
The double lip seal provides twice as good a seal as the S seal, while the maximum permitted rotational speed is adequately lower, due to the greater friction of the rubber lips against the steel inner ring. However, this rotational speed may be higher than with a 3-lip seal, up to 1500rpm. The sheet metal part protects the seal from the soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The main area of application of bearings with such sealing are agricultural and construction machines at installation place where the rotational speed is up to 1500 rpm.
Dual sealing, protection cover placed on the inner ring protects against rough impurity particles and makes the labyrinth with the sheet part of the seal; then the sealing S type, with the labyrinth between the sheet part and the rubber lip that conducts the contact sealing. The friction and speeds are the same as with S but has much better protection against rough impurity particles. It is very good sealing system: the sheet part protects the seal from the soil, dust and rough particles. At the same time makes the labyrinth with the rubber part. The rubber part provides the contact sealing that prevents the penetration of the finer impurities, water, moisture, steam etc. Suitable for heavier conditions due to better protection against foreign matters. It is used with the Y bearings (standard).
S seal on the base side and 3-lip seal on the front side which is exposed to contaminants.
The 3-lip seal on the front side protects the bearing from contaminant penetration.
3-lip seal on the both side of the bearing, provides equal protection against contamination. Recommended for application where the possibility of contamination is the same on the both side.
RS seal on the base side and RS seal with Metal shield on the front side which is exposed to the environment.
S seal on the base side and S seal with Plastic cap on the front side which is exposed to the environment.
Plastic cap protects the nut and reduces the penetration of contaminants.
S seal on the base side and 3-lip seal with Metal flinger ring on the front side which is exposed to contaminants.
The 3-lip seal on the front side protects the bearing from contaminant penetration. The metal flinger ring protects the seal from mechanical damage.
3-lip seal on the base side and 3-lip seal with Metal cover on the front side which is exposed to contaminants.
The 3-lip seal on the front side protects the bearing from contaminant penetration. The Metal cover protects the seal from mechanical damage and from entanglement of grass stems of plants and twines.
Front side is totally sealed with a Sheet metal shield which prevents all kind of contaminations.
The base side is protected with 2-lip seal and the Metal flinger ring to protect the 2-lip seal from mechanical damages.
S seal on the base side and S seal with Metal flinger ring and Metal cover ring on the front side which is exposed to contaminants.
The Metal cover ring protects the seal from mechanical damage and from entanglement of grass stems of plants and twines.
3-lip seal with Metal flinger ring on the both side of the bearing, provides equal protection against contamination. The Metal flinger ring protects the seal from mechanical damage.
3-lip seal on the base side and 3-lip seal with Metal-rubber flinger ring on the front side which is exposed to contaminants.
The 3-lip seal on the front side protects the bearing from contaminant penetration. The Metal-rubber flinger ring protects the seal from mechanical damage and provides additional sealing.
3-lip seal on the base side and 3-lip seal with Metal cover ring on the front side which is exposed to contaminants.
The 3-lip seal on the both side protects the bearing from contaminants. The Metal cover ring protects the seal from mechanical damage and from entanglement of grass stems of plants and twines.
A 5-lip seal on the both sides of the bearing, provides equal protection against contamination. 5-lip seal provides a high level of the bearing protection from impurities and due to the special design of the seal the rotation speed can be doubled.
A 5-lip seal with Metal flinger ring on the both side of the bearing, provides equal protection against contamination. 5-lip seal provides a high level of the bearing protection from impurities and due to the special design of the seal the rotation speed can be doubled. The Metal flinger ring protects the seal from mechanical damage.
3-lip seal on the base side and double 3-lip seal on the front side which is exposed to contaminants.
The double 3-lip seal on the front side protects the bearing from contaminant penetration. Also, the outer seal with 3 lips, with additional sealing, protects the inner seal from mechanical damage.
Cassette seal on the both side. This sealing provides excellent protection from contamination and low friction. Therefore, bearings with this type of sealing can be used for high speed applications.
Two part double lip wheel bearing seal on the both side. This sealing provides excellent protection from contamination and low friction.
Front side is totally sealed with a polypropylene shield which prevents all kind of contaminations.
The other side is additionally protected with dirtblock seal and with a metal protective cap. Dirtblock seal is designed for hard working condition, half metal – half rubber outside diameter provides reliable seal retention in the bore and improves sealing performance. Inside diameter is covered by rubber and improves sealing performance and easy installation. The metal protective cap protects the seal from mechanical damage and from entanglement of grass stems of plants and twines.
This sealing provides maximum protection against liquid or solid contaminants, which significantly extends bearing service life.
For example, in LY 205 2F the suffix 2F describes the seal.
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Source: FKL Temerin (fkl-serbia.com).
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