Nilos rings are thin metal sealing rings used to protect ball bearings and roller bearings against dirt, dust and other contaminants. The ring is mounted directly next to the bearing and forms a compact seal between the bearing and its surroundings.
Thanks to their small installation space, Nilos rings are suitable for a wide range of industrial bearing arrangements. Different versions are available for sealing against the inner ring, sealing against the outer ring and bearings that already have a seal or metal shield. In many cases, the correct Nilos ring can be selected using the bearing number.
A Nilos ring is a metal bearing seal that is mounted directly next to a rolling bearing. The specially formed sealing edge is positioned against the inner or outer ring of the bearing and helps prevent contaminants from reaching the bearing.
Nilos rings are used with ball bearings, cylindrical roller bearings and tapered roller bearings, among others. Due to their thin metal construction, the seal requires relatively little installation space.
The main function is to protect the bearing against contamination. Dirt and other particles can damage the raceways and rolling elements and therefore shorten the service life of a bearing. A suitable bearing seal helps keep these contaminants outside the bearing arrangement.
During installation, the thin sealing edge of the Nilos ring is positioned against the designated bearing ring. With the standard design, this initially creates a contact seal.
During the running-in period, the sealing edge adapts to the surface of the bearing ring. This eventually creates a very small sealing gap. This construction helps prevent dirt and other contaminants from easily reaching the bearing.
An important feature of Nilos rings is their compact construction. The ring is mounted directly next to the bearing and therefore requires relatively little additional installation space.
The two most common versions are the Nilos ring AV and Nilos ring JV. The main difference is the bearing ring against which the sealing edge seals.
An AV Nilos ring seals against the outer ring of the rolling bearing. The designation of the ring is combined with the number of the bearing for which it is intended.
A designation such as 6410 AV, for example, indicates an outer-ring sealing Nilos ring for a single-row deep groove ball bearing 6410.
A JV Nilos ring seals against the inner ring of the bearing. According to NILOS documentation, the JV version is preferred where the construction allows it. The bearing number is also used in the designation, for example 6410 JV.
Bearings that are already fitted with a shield or seal at the factory can also be given additional protection with a Nilos ring in certain applications. ZAV and ZJV versions are available for this purpose.
The ZAV version is used for a bearing that already has a shield or seal and seals against the outer ring of the bearing.
The ZJV version is also intended for bearings with an existing shield or seal, but seals against the inner ring. These versions can provide additional protection where dirt may reach the bearing or where condensation is a concern.
Special Nilos rings are available for tapered roller bearings. Due to the design of a tapered roller bearing, the required dimensions and the position of the sealing edge differ from those used with a standard deep groove ball bearing.
AV and JV versions are also available for tapered roller bearings. The AV version seals against the outer ring and the JV version seals against the inner ring of the tapered roller bearing.
An AK version is also available for certain tapered roller bearings. This design uses two discs to create a double seal on the outside of the tapered roller bearing.
The bearing number is an important starting point when selecting the correct Nilos ring. The dimensions of the Nilos ring are matched to the bearing with which it is used.
For example, if you have a bearing with number 6204, a 6204 AV or 6204 JV may be used depending on the construction. A bearing that already has a Z, ZZ, RS or similar sealing design may require a different Nilos ring.
In addition to the bearing number, check the bearing type, position of the inner and outer rings, existing bearing seals, rotational speed and available installation space. These factors determine which version is suitable.
Both a Nilos ring and an oil seal can be used in constructions with rotating components, but their operation and application are different.
A Nilos ring is specifically designed as a compact metal seal for a rolling bearing. The ring is positioned directly next to the bearing and protects the bearing arrangement against contamination.
An oil seal is a radial shaft seal that is generally installed in a housing and seals directly against a rotating shaft. Oil seals are used, among other purposes, to retain oil or grease within a machine construction.
Nilos rings are used in a wide range of machines and installations in which rolling bearings need to be protected against contamination. Their compact construction makes them particularly useful where limited space is available around the bearing.
In industrial machinery and drive systems, Nilos rings can be used as additional protection for ball and roller bearings against contamination.
In agricultural and construction machinery, bearings can be exposed to dust, sand and other dirt. A suitable Nilos ring can help protect the bearing arrangement against these contaminants.
Nilos rings can also be used in electric motors, conveyor systems and other drive systems where additional bearing protection is required.
Correct installation of the Nilos ring is important for proper sealing performance. The sealing edge must be positioned correctly in relation to the inner or outer ring of the bearing.
The ring must be kept flat and properly supported during installation. Damage or deformation of the thin metal sealing edge can affect the operation of the seal.
During installation, the specified lubrication of the sealing area must be taken into account. Follow the installation instructions applicable to the specific Nilos ring and bearing arrangement.
A Nilos ring is a thin metal bearing seal that is mounted directly next to a rolling bearing and helps protect the bearing against dirt and other contaminants.
An AV Nilos ring seals against the outer ring of the bearing. A JV Nilos ring seals against the inner ring.
ZAV and ZJV are versions for bearings that already have a shield or seal. ZAV seals against the outer ring and ZJV against the inner ring.
In many cases, the correct Nilos ring is selected using the bearing number and required sealing type. A 6204 bearing can, for example, be combined with a 6204 AV or 6204 JV depending on the construction.
Yes. Special Nilos rings are available for tapered roller bearings, including AV, JV and AK versions.
A Nilos ring is installed directly next to a rolling bearing to protect the bearing arrangement. An oil seal is generally installed in a housing and seals directly against a rotating shaft.
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