the Roller Bearing seal forms affected by the following factors

In order to prevent dust and moisture from entering the bearing to avoid loss of the lubricant in the bearing must be sealed. In general, the bearing seal forms affected by the following factors :
⑴ bearing outside the work environment ;
⑵ bearing speed and temperature ;
⑶ support structure and characteristics of the shaft ;
⑷ lubricant types and performance .
Sealed in accordance with the principle can be divided into two categories : Automotive Lubricants non-contact seals and contact seals . Non-contact seal unrestricted rate . Lower Tapered roller bearing speeds where you can use the online contact seals , commonly used materials with fine felt, rubber, leather , cork or antifriction good hard materials.
Rolling bearing lubricants manufacturers, the main role of the lubricant is to reduce friction and reduce wear resistance , while also reducing the contact stress , to avoid corrosion , vibration absorption , cooling , heat and so on.
Grease and oil lubricated are commonly used in two ways lubrication . Further , in some special cases it is Roller bearing possible Cylindrical roller bearing  to select the lubricating solid lubricants . Which way to use a lubricant , and the speed of the relevant bearing , the rolling bearing is usually used in measuring the speed dn value represents the size of the bearing .
Greased loss is not easy , simple structure, easy to seal and maintain, operate in a long time , just to fill a grease . Fill generally not exceed the amount of grease to one half of the third bearing grease filling too easily lead to friction and heat , affecting the normal performance of the bearing. Smaller than greased friction , heat dissipation, is the main advantage of oil lubrication , so the lubricating oil is mainly used for high-speed or high temperature applications.