Printing cylinder bearing units in the news

Following extensive research with leading printing press builders, SKF has developed a new concept for printing cylinders.

Following extensive research with leading printing press builders, SKF has developed a new concept for printing cylinders.

Its range of printing cylinder bearing units (PCUs) offers increased speed and print quality by combining the functions of the separate components of the traditional bearing arrangement into a compact, self-contained, easily adjustable unit.

The main application of the unit is in facilitating adjustments to the blanket or plate cylinder during printing press operation.

It is also suitable for applications where eccentricity is needed, such as in oscillating inking systems.

SKF offers several PCU designs to meet differing needs in the printing industry.

The basic PCU design comprises multi-row (two, three or four) cylindrical roller bearings, with an outer ring replaced by an eccentric ring.

The range includes designs with one or two eccentric intermediate rings.

High precision is obtained through using a combination of a cylindrical roller bearing and a preloaded needle roller bearing to provide totally clearance-free units.

Reliable eccentric adjustment is assured, as the preloaded needle roller and cage assembly eliminates any risk of jamming and allows the eccentric adjustment mechanism to have a minimum friction torque.

The compact design allows easy mounting and dismounting, and offers high stiffness through the use of essentially stiff bearing designs.

The unit has a low operating temperature, created by the low friction present in the cylindrical roller bearing.

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