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Ideal bearing supports for coating cylinders in coating units: INA polygon bearing

Matched to your printing machine

The Schaeffler Group is a reliable engineering partner for its customers beyond the delivery of components. We work closely with all leading printing machine manufacturers worldwide which results in continuously growing, shared application and production expertise. This in turn leads to a host of new ideas that enable both sides achieve leading positions in the market.

Example: polygon bearings

Polygon bearings were developed for longer, radial traverse distances, such as those in coating units for sheet offset printing presses. What is so special about these bearings is the fact that they have a polygonal outer ring with lubrication and locating holes as well as precise functional surfaces for mating parts (polygon adjustment). The outer ring is supported by three track rollers that are used to obtain a long traverse distance for oscillating motions. The inner high-precision cylindrical roller bearing operates clearance-free and with extremely low friction.

Example: Bearing units DMLL

In the newly developed printing machine bearing unit DMLL, the eccentric is replaced by a maintenance-free linear guidance system in a needle roller and flat cage assembly. This means that the blanket and plate cylinders of a rotary printing press can now be adjusted in a linear movement, instead of a circular path. An hydraulic piston element has been integrated into the unit for the first time which enables precise control of the adjustment.

The cylinder is supported by double row high-precision cylindrical roller bearings that are designed for high speed and have particularly effective seals.

Short shaft journals – without bearer rings – are sufficient for the bearing unit which is flanged on the inside of the side wall. This arrangement still maintains the full rigidity of the printing cylinder system.


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