Bearing seals, also known as Cellasto rings, Cellasto seals or Cellasto sealing rings, are used to protect components such as radial spherical plain bearings and rod ends against dirt, moisture and loss of lubricant. The sealing ring is positioned around the bearing and helps prevent contamination from reaching the sliding surface. This can reduce wear and help extend the service life of the bearing.
Cellasto sealing rings are made from cellular polyurethane (PU). The material has a partially open-cell structure and can be impregnated with oil or grease. This allows the seal not only to protect against contamination, but also to act as a lubricant reservoir. Cellasto rings are highly deformable and are therefore suitable for bearings with oscillating and tilting movements. Techniparts supplies Cellasto bearing seals for various industrial applications.
A Cellasto ring is a flexible bearing seal made from cellular polyurethane. The seal is used, among other applications, with radial spherical plain bearings and rod ends. In these applications, components can oscillate or tilt relative to each other. The seal must be able to follow this movement while simultaneously protecting the bearing against external contamination. Cellasto differs from many conventional rubber seals because of its cellular structure, high compressibility and resilience.
For a bearing, it is important that the sliding surface remains clean and sufficiently lubricated. When dirt, dust or moisture enters the bearing, wear can increase. A Cellasto sealing ring therefore forms an additional barrier around the bearing. In addition, the structure of the material can retain oil or grease. The seal therefore not only protects the bearing, but can also help retain lubricant around the bearing.
Cellasto rings are mainly used in bearings where oscillating, reciprocating or tilting movements occur. Examples include radial spherical plain bearings, rod ends and bearing constructions in hydraulic cylinders. Due to the high deformability of the material, the seal can follow the movement of the bearing. This makes Cellasto suitable for applications where a traditional, stiffer seal would provide insufficient freedom of movement.
A radial spherical plain bearing is used where movement between a shaft or rod and the surrounding construction must be accommodated. The bearing can make oscillating and tilting movements. The Cellasto ring is fitted around the bearing and protects the sliding surface against dust, dirt and moisture. At the same time, the seal helps retain grease or oil around the bearing.
Cellasto seals can also be used with rod ends. Rod ends are used in constructions where forces must be transmitted while a certain angular displacement or movement remains possible. A suitable bearing seal helps prevent contamination from entering the bearing section and supports the retention of lubricant around the bearing.
Cellasto seals are particularly suitable for applications where bearings are exposed to harsh conditions. Examples include tractors, agricultural machinery, construction equipment and industrial installations. In such machines, dust, sand, moisture and other contaminants may be present around the bearing. The high deformability of Cellasto makes the material suitable for these conditions.
A Cellasto seal works by positioning the flexible PU material around the bearing under preload. This creates a relatively large sealing surface. The combination of the larger contact area and the deformability of Cellasto allows the seal to maintain contact during movement. This helps keep dirt out and retain lubricant around the bearing.
Contamination can significantly increase wear on the sliding surface of a bearing. This is especially important in machines used outdoors or in dusty environments. The Cellasto bearing seal forms an additional barrier between the bearing and its surroundings, helping to prevent dirt, dust and moisture from entering the bearing.
Cellasto has a partially open-cell structure. This means the material can be impregnated with oil or grease. The material can therefore function as a lubricant reservoir. This can contribute to longer lubrication intervals while also supporting the sealing effect against dust and other contamination.
Techniparts supplies Cellasto seals as standard in MH 24-45 quality, with a density of approximately 450 kg/m³. Harder or softer versions can also be supplied on request. The combination of cellular structure, compressibility and resilience makes Cellasto suitable for flexible bearing seals and applications involving larger deformations.
Cellasto is a cellular polyurethane (PU) with properties that make it suitable for flexible bearing seals. The material combines high resilience with relatively low permanent deformation. This allows the seal to largely return to its original shape after loading.
An important advantage of Cellasto is its high compressibility. Due to its high deformability, the seal can follow large oscillating or tilting movements of the bearing. In addition, larger tolerances can be accommodated than with some less compressible sealing materials.
Cellasto performs well in contact with oil and grease. This is important because bearing seals are often used directly around lubricated components. Final suitability must always be assessed based on the lubricant used, temperature and other operating conditions.
Good lubrication is important for many radial bearings in order to reduce friction and wear of the sliding surface. If lubricant disappears from the bearing or becomes contaminated, this can affect bearing life. A Cellasto ring impregnated with oil or grease can retain lubricant around the bearing.
The partially open-cell structure functions as a type of reservoir for the lubricant. This can help extend lubrication intervals while simultaneously supporting the sealing action against dirt and dust. The correct quantity and type of lubricant must, however, be suitable for the application and the properties of the bearing.
For many radial spherical plain bearings, Cellasto seals are available that correspond to DIN/ISO 12240-1, dimension series E. This standard relates to the dimensions of radial spherical plain bearings. This makes it possible to search specifically for a suitable bearing seal for a standardised bearing.
When selecting a Cellasto ring, always check the bearing dimensions, design and available space. The correct seal is determined by the combination of the bearing, installation position and operating conditions.
For correct operation, a Cellasto seal must be installed under preload. This ensures that the sealing material remains in contact with the relevant surfaces. During installation, the available space and required compression must be matched to the design of the ring and bearing.
For the current Cellasto CD design, a maximum compression of approximately 35% is used during installation. During operation, the seal can then accommodate larger deformations. Due to the high compressibility of the material, Cellasto can also be used in constructions where relatively little installation space is available.
Standard Cellasto bearing seals have a temperature range of approximately -20 °C to +80 °C. Depending on the design, short-term exposure to temperatures of approximately +100 °C may be possible. The exact load capacity depends on the material, application and operating conditions.
For applications close to the limits of the temperature range, temperature should not be considered in isolation. The duration of exposure, lubricant used, movement and mechanical loading can also influence the service life of the seal.
When selecting a Cellasto bearing seal, it is important to first determine which bearing needs to be sealed. Check the bearing type, bearing dimensions and whether it is a version according to DIN/ISO 12240-1. The operating conditions are also important.
Consider the temperature, movement, level of contamination, lubrication and available installation space. Techniparts supplies Cellasto seals as standard in MH 24-45 quality and can also supply other hardnesses on request. For a specific application, the bearing data can be used to determine which Cellasto ring is suitable.
A Cellasto ring is a flexible sealing ring made from cellular polyurethane that is used, among other applications, to protect radial spherical plain bearings and rod ends against dirt, moisture and loss of lubricant. Due to its high deformability, the seal can follow bearing movements.
Cellasto seals are mainly used with radial spherical plain bearings, rod ends, hydraulic cylinders, agricultural machinery, tractors, construction machinery and industrial installations. The material protects the bearing against contamination and helps retain lubricant around the bearing.
Cellasto sealing rings are made from cellular polyurethane (PU). Techniparts supplies MH 24-45 quality as standard with a density of approximately 450 kg/m³. Other hardnesses or material versions can also be supplied on request.
For the standard version, the temperature range is approximately -20 °C to +80 °C. Depending on the design, a higher temperature may be possible for short periods. For applications near the limit of the temperature range, always assess the complete operating conditions.
The material is highly compressible, resilient and suitable for retaining oil or grease. This allows a Cellasto ring to protect the bearing against contamination while also helping to retain lubricant around the bearing. The seal can also follow oscillating and tilting movements.
Yes. Cellasto rings are specifically suitable for applications involving oscillating, reciprocating or tilting movements. The high deformability of the material allows the seal to follow these movements while maintaining contact with the bearing.
Suitable Cellasto seals are available for many radial spherical plain bearings according to DIN/ISO 12240-1, dimension series E. Always check the exact bearing dimensions and design before selecting a seal.
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