JOJI backing bearings are available in a variety of designs and variations. The main types are double-row or triple-row cylindrical roller bearings. Single-row needle roller bearings and double-row tapered roller bearings are also available.
Backing bearings were specifically developed for multi-roll cold rolling mills, but can also be used in other applications, such as straightening or bending machines. These bearings have a particularly thick outer ring and can be mounted on fixed support shafts to form backup or straightening rolls. Figure 1 shows the backing bearing arrangement on the eight support shafts of a 20-roll mill.