Skip to content
Home » The Pros Of Sealed Bearings

The Pros Of Sealed Bearings

Sealed spherical roller bearings reduce space, cost and the planet. These are attractive features in an ever-changing market.Seals on spherical bearings opens new possibilities of use for this kind of bearing. In the future, seal bearings market could be a substantial portion of the overall market for the spherical roller bearings.

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

The sealing can add a variety of characteristics:

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

The seals are designed using two lips for sealing: one lip on the outside that blocks large particles and an internal one that is the one that makes the seal. This ensures a good seal and longer service life. Furthermore to larger bearings the seals are easy to take off, allowing for examination of the bearing, and should it be necessary, changing the seals.

It is combined with the latest bearing design techniques – self-guiding rolling rollers, sturdy steel cages, and a floating guide ring to make the most efficient spherical roller bearings , when they come to capacity for load, friction and longevity. Sealed spherical bearings can be able to handle misalignment which can allow for the proper distribution of loads even when the shaft of the machine is off-center.

In the instances where this product was used the bearing has performed admirably. It has tested in the lab as well as in actual conditions, and we’re still conducting extensive laboratory tests to be able to meet the anticipated market requirements. Although the bearing is in line with the original specifications for performance however, the limitations of its capabilities are much greater.

The results of all tests show that the performance of the bearing surpasses expectations in the various applications that they’ve been tested. With the knowledge gained through these testing, it’ll be possible to suggest the bearing for more demanding 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 obvious advantages, including weight and space savings which the end-user can always quantify in terms of savings in terms of money. One example of this is in robotics. In the event of replacing the old bearing arrangement by a sealed spherical bearing, the robot’s bearing arrangement’s width is cut by half. This reduces the overall size of the robotic arm meaning that the final user is able to put the robot in smaller space. It is also a cost-effective option. Cleanliness isn’t as important while the bearing is installed. In addition the bearing doesn’t need to be lubricated, which can save you money in maintenance.

Simple mounting

With seals built in the bearing, it’s cheaper to construct and place bearings. The manufacturer of Jacquard weaving looms, which is a kind made of machinery that makes top-quality cloth, has embraced this method. This sealed bearing ideal for the heavy shock loads and low speeds that are required for this type of textile.

Machining processes in the housing to allow for separate seals are no longer required and the complicated mounting process for seals can be removed. Additionally the bearing is protected from the entry of dirt during the mounting process and the initial lubrication is already in place. In most instances there is no need for relubrication when operating these looms. If it is required, lubrication may be made available with the feature code W33.


When trams are used, sealed bearings are employed to provide an eco-friendly option. These vehicles have frequent stops, and begin with a moderate pace of running. In this case it is estimated that the C/P ratio (the ratio of the basic static load ratings to the equivalent loads on dynamic bearings) is approximately 10. The reason for switching the bearings to sealable ones was to decrease the leakage of oil through seals on the outside. Prior to this, oil-lubricated bearings were employed in which the same oil was used to lubricate these bearings as well as the gearbox. When a bearing is sealed, this bearing gets lubricated using grease and seals for the bearing provide additional protection. This results in less oil will be released.

Protection from dirt

One of the places where seals’ protection properties are utilized is in the steel production process. Seals that seal spherical bearings have 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 employed 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 can range between 20 to 180 degC . The support roller speeds vary within 2-10 rpm, with a the C/P ratio typically being lower than.

The traditional external seals are not enough to block the entry of steam or scale. The traditional method was to continuously fluidize the bearings to guard their surfaces from dust. This demands a massive amount of the lubricant. A single slabcaster could use up to 50 tons of grease each year. By sealing spherical ball bearings the amount of grease consumed can be reduced by a significant amount. The Ifor Williams sealed bearing doesn’t need to be lubricated, while the seals on the exterior are only occasionally lubricated.

In reality this means that the usage of grease can be reduced down 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. Another benefit is the fact that it is much easier for the system to be kept in good order. This means that every part that require cooling are kept cool. The number of break-outs, where the steel cast cracks open and liquid steel spills out, is reduced dramatically.

Sealed Spherical Roller Bearings are available in two variations with one designed for normal temperatures that range from 110 to 120 degrees and the other suitable for applications that require high temperatures that can reach 180 degrees Celsius. The bearing comes with various seal and lubricant options for the material. The range includes bearings for shaft diameters from 40 mm up to 220 mm.