Four Row Cylindrical Roller Bearing

Four-row cylindrical roller bearings are typically used for the roll necks of rolling mills, calenders and presses since they are so well-suited for rolling mill applications where the rolling speed is high.

The horizontal rolls are supported by multi-row cylindrical roller bearings and tapered roller bearings. The cylindrical roller bearings at the drive end to compensate for the length variations caused by heat expansion. Compensation of length variations through the chock axially floating in the stand at the drive end is impossible with preloaded chocks.

The horizontal rolls in the roughing stands, which are loaded with 3,150 kN, are supported in four row cylindrical roller bearings and four row taper roller bearings of 355.6 x 257.2 x 323.8 mm. The bearings have a loose fit on the roll neck, which simplifies mounting.

Four Row Cylindrical Roller Bearing

No loose fit can be provided in those stands where section steels are finish-rolled as the required quality can only be achieved with accurately guided rolls. For this reason, cylindrical roller bearings and tapered roller bearings with a tapered bore were selected and press-fitted onto the tapered roll neck. The hydraulic method used simplifies mounting and dismounting. Due to the lower rolling load (2,550 kN), the horizontal rolls, in this case, are supported by double-row cylindrical roller bearings and tapered roller bearings of 220.1 x 336.6 x 244.5 mm.