(1) four-row cylindrical roller bearing FAG
   Cylindrical roller bearings and roll neck diameter using a tight fit, radial force, with a load capacity, extreme high speed, high precision, inside and outside the ring can be separable and interchangeable, easy processing, low production costs, the advantages of easy installation and removal; thrust bearing axial force, the specific structure type can be selected according to the characteristics of mill. Heavy at low speeds, together with the thrust roller bearing, with a smaller axial clearance withstand thrust load. When the rolling speed is high, coupled with angular contact ball bearings, not only the high speed limit, and the work of the axial clearance can be strictly controlled. Get close to the axial roller guide, and can withstand axial load force generally. This type of bearing has a bearing not only long life, high reliability, and has rolled products of high precision, easy to control and many other advantages, so currently the most widely used for wire rod mill, plate mill, foil mill, double support rollers cold mill and hot rolling mill and other support roller.
  (2) four-row tapered roller bearings FAG
   FAG tapered roller bearings can withstand the radial force, but also to bear axial force, eliminating the need for thrust bearings, so the host becomes more compact. Tapered roller bearings and roll neck diameter using a loose fit, installation and removal is very convenient, but sometimes caused by a loose fit sliding creep, so often bore a spiral tank processing. This configuration type of the current application is still relatively wide, such as the four-roll hot-rolling mill and cold mill work rolls, cogging machine, structural steel mill rolls and other occasions.
  (3) Spherical roller bearings FAG
   FAG rolling bearings early on in the mill and now a different type of configuration, which was mainly with two spherical roller bearings installed side by side on the same roll neck. This type of configuration to meet the basic production conditions at the time, rolling speed up to 600rpm.But as speeds increase, more and more prominent disadvantages: F bearing life is short, consumption of large, low precision finished, roll neck were badly worn and large roll axial movement

 



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