CENTRIFUGAL SEALS AND LUBRICATION
SEALING WITHOUT CREATING WEAR ON THE SHAFT
Standard Extreme Bearing housings are made of 316 stainless steel. Specially developed centrifugal seals are also used.
The rubber of the rotor ring clamps around the shaft and is turning with the shaft vertically against the stator ring. Because the lips are positioned vertically against the stator ring, the dirt will be repelled by the centrifugal force from the sealing lips. The rotor ring can be moved eccentrically in relation to the stator ring. In this way, the centrifugal seal is able to absorb any misalignment of the shaft without creating wear on the rubber lips.
The grease passes the retaining edge through the lubrication channels under the stator ring and between the two sealing lips and stator ring. The grease ensures that any dirt is flushed away.
The clamping of the rubber rotor ring around the shaft means that the bearing can be assembled even on a shaft which has suffered light surface damage such as a groove.
Berulub FG-H-2-SL is highly recommended as the grease for lubricating Extreme Bearings. It is a high performance and food-safe lubricant.
Due to the low viscosity of the base oil, this grease is very suitable for use in the centrifugal seal. This smooth but tacky grease will make sure that all dirt is kept out of the seal. The high-load capability (four ball weld load >4000N acc. DIN 51 350 P4) makes this grease ideal for all types of Extreme Bearings. We supply the bearings but we do not supply lubricants. For more information about lubricating Extreme Bearings, you are welcome to write to a Dutch distributor of lubricants at the following email address: FenS.