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Home ยป The Advantages of Sealed Bearings

The Advantages of Sealed Bearings

Sealed spherical bearings with seals help save space, money and also the environment. They are appealing features in a highly competitive market.Seals on spherical roller bearings can open new applications for this kind of bearing. In the future, seals on bearings may be a substantial portion of the overall market for Spherical roller bearings.

Sealed spherical roller bearings can be used to handle heavy load and huge misalignments with a high degree of protection from dirt and same time keep the lubrication.

The Ifor Williams sealed bearing provides a range of advantages:

The bearing is protected from external contaminants.
Lubricant remains in the correct position. This implies that the bearings are maintained in lubrication for the duration of their life or the interval for relubrication is extended.
Easier handling. The bearing is shielded from dirt while it is being mounted.
Space savings. External sealing is a way to save space.

The seals are made using two lips for sealing: an outer lip that wards off fine particles, and an inner one that is the one that makes the seal. This allows for a strong seal and a longer lifespan. Additionally when bearings are larger, the seals are easy to take off, allowing for an inspection of your bearing, and should it be necessary, changing the seals.

It is combined with the latest bearing design technology , such as self-guiding rollers, steel cages and a floating guide ring to make the most efficient spherical roller bearings , when they come to capacity for load and friction, as well as life. Sealed spherical roller bearings are able to also handle misalignment issues this allows for a the proper distribution of loads even when the shaft of the machine is off-center.

When this new product was tested the bearing has performed admirably. This bearing was tested in the lab as well as in real-world conditions, and we’re conducting further extensive lab testing to ensure that it meets future market requirements. While the bearing has met its initial performance specifications but the extreme limitations of its capabilities are much greater.

All tests prove that the bearing’s performance surpasses expectations in the various applications that they’ve been utilized. Based on the data gathered through these testing, it is possible to recommend the bearing to be used in tougher operating conditions, and pave the way for the development of new applications.

Space saving

A bearing that has integral seals will take up less space than those that has external seals. This compact design offers distinct advantages, like weight and space savings which the end-user can always quantify in terms of savings in terms of money. An excellent example can be found in robotics. When you replace the existing bearing arrangement by a sealed spherical bearing, the robotic bearing arrangement’s width is cut by half. This will reduce the overall size of the robotic arm and the end user can place the robot in smaller space. It is also a cost-effective option. A clean environment isn’t as important when the bearing is installed. Additionally it is not need to be lubricated, which provides savings when it comes to maintenance.

Simple mounting

With seals built inside the bearings, it’s cheaper to construct and install bearings. A company that manufactures Jacquard weaver looms, a type made of machinery that makes top-quality cloth, has embraced this method. A sealed roller bearing ideal for the high-shock loads as well as the low speeds that are required for this type of textile.

Machining processes in the housing to accommodate seals separately are no longer required and the complicated mounting process for seals can be eliminated. Furthermore the bearing is protected from the entry of dirt when it is mounted and the initial lubrication process is already in place. In most instances there is no need for relubrication when operating these looms. If needed, relubrication could be offered by using the feature W33.


When trams are used, sealed bearings are employed to provide an eco-friendly option. The vehicles are subject to frequent stops, and begin with a moderate pace of running. In this instance it is estimated that the C/P ratio (the ratio of the basic loading rating for dynamic loads to the equivalent loading of a dynamic bearing) is about 10. The reason to switch the bearings to sealable ones was to decrease the possibility of leakage from seals on the outside. Before, oil-lubricated bearings were utilized with the same oil used to lubricate these gearboxes and bearings. When a bearing is sealed, this bearing gets lubricated by grease and seals for the bearing provide additional protection. This results in less oil will be dispersed.

Protection from dirt

One of the places where the seal’s protective properties are utilized is in the steel production process. Seals for spherical roller bearings with a spherical been used successfully to continuous casting equipment as well as roller tables. In casting casters, molten iron transforms into slabs, sheet iron or billets. Bearings are utilized to support the rollers of the conveyor system, and are exposed to continuous streams of water, which are mixed with salt and other contaminants. In this case the temperature that affects the bearings could vary between 20 and 180 degC . The support roller speeds vary in the range of 2 to 10 r/min. the C/P ratio typically being under one.

The traditional external seals are not enough to stop the ingress of steam and scale. The previous method was to continuously fluidize the bearings to guard their surfaces from dust. This is a huge consumption of oil. A single slabcaster could consume as much as 50 tonnes of grease each year. When spherical bearings are sealed, the consumption can be reduced by a significant amount. The sealed bearing doesn’t need to be lubricated, while the seal on the outside is occasionally lubricated.

In the real world this means that the use for grease will be limited to just a couple of tonnes annually. As well as the reduced use of lubricant, which produces savings, even larger savings are to be gained through eliminating the need to deal with the lubricant-contaminated wastewater. A further benefit is the ability maintain the cooling systems in good order. This means that any part which require cooling are kept cool. The number of break-outs, where the steel casting cracks open and liquid steel spills out, is reduced significantly.

Sealed Spherical roller bearings are offered in two variations that are suitable for temperatures of up to 110 degrees Celsius and another that is designed for applications with high temperatures that can reach 180 degrees Celsius. The bearing comes with a variety of seal and lubricant options for the material. The selection includes bearings that can be used that can be used on shafts with diameters ranging from 40 mm to 220 millimeters.