Usually the seal is to keep said bearings internal good lubrication state, and to prevent the oxidation of cooling water, iron, impurities dipped into the working surface of extend the service life of the bearings.

Because rolling mill bearing sealing problem exists, bearing damage is most is close to the side of the roll body parts, bearings often because grease pollution, erosion, the parts in a work surface wear, flake even break, especially with the cold rolling emulsion infiltration, make a grease failure faster.

Import bearing seal have bring seal and outer seal two kinds. The outer seal mainly uses the labyrinth and contact with the combination of design. The more the maze level (no less than the poles) clearance of the seal of the smaller the better the results. Maze of the clearance of the size of the bearing size according to take unilateral radial 0.6 ~ 1.5 mm; Axial 4 ~ 6 mm.

Contact skeleton oil seal in rolling mill in apply more extensive, in order to increase the effect can be two or three tied for use. But to notice is that the oil seal have directional, the cannot be installed. ReGaJi general with two oil seal, the two oil seal lips mouth to the housing, to prevent the outside world into dirt. However, cold rolling mill with general outfit three oil seal near the bearing a oil seal lips mouth to inside, to prevent grease spill affect metal rolling quality. Be careful when using oil seal, avoid outfit roll into bad lips mouth, affect the sealing effect.

 
RBR type sealing ring is a kind of rolling mill bearing special rubber lips type sealing ring, in recent years has been widely used. RBR sealing ring the axial seal method, its lips mouth posted on the surface of the gland, and are not subject to the influence of the roll beating old fat internal bearing can overflow, external cooling water, oxidation iron, impurities be lips mouth block access to, and have a good sealing effect. Easy to use, roll change when loaded roll bearing has no effect.
 



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