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Sealed spherical roller bearings are pre-lubricated with special grease and then sealed with high-performance contact seals in order to protect the bearings from environmental contamination and prevent premature bearing damage.Sealed Spherical Roller Bearings has longer working life than normal spherical roller bearings.
1. In continuous casting equipment, the cast slab is supported by rollers—spherical roller bearings with a sealed design to support the roll.
2. Sealed spherical roller bearings are an ideal choice for use in elevator plants.
3. A very wide range of industrial sectors, such as general and special machine building, steel and aluminum, pulp and paper production, wind power, shipbuilding, private and public railways and mining.
The main difference between the two types of bearings is that sealed spherical roller bearings have an efficient double seal that prevents lubricant escape and contaminants from entering.
Both bearings have high load capacity characteristics, and the sealed spherical roller bearing has a longer life, while the unsealed one is lighter.
Determine based on model suffix: "2RSR" Steel-reinforced lip seal on both sides made from nitrile rubber (NBR), grease filling level 25% to 40%, filled with high-pressure grease; "2VSR" Steel-reinforced lip seal on both sides made from fluoro rubber (FKM), grease filling level 55% to 65%, filled with high-temperature grease.
Sealed Spherical Roller bearings have some drawbacks. The seals can create additional friction, which can lead to increased heat generation and reduced efficiency. There are certain limitations to the relubrication of sealed spherical roller bearings because the presence of seals may complicate the maintenance or relubrication of the bearing.
QJ218-N2-MA belongs to a four-point contact ball bearing. It has an inner diameter of 90mm, an outer diameter of 160mm, a thickness of 30mm, a single-row bearing with locating grooves, a solid brass cage and an outer ring guide.
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