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Clearance-free – radially and axially
To achieve the best possible printing results, main cylinders in printing machines must be guided clearance-free and rigidly on the locating bearing side, both axially and radially. Matched tapered roller bearing used as locating bearings have proven to be a reliable and efficient solution. They are clearance-free and can support high axial and radial loads. Compared to single-component solutions, FAG assemblies matched during manufacture have significant mounting benefits and increased functional safety. They are very precise (P5 and P4 tolerances) and meet the enormously high requirements for runout accuracy.
The thick-walled outer ring in FAG’S tapered roller bearings also provides another benefit with regard to functional safety and precision. Eliminating a separate mounting sleeve reduces tolerances and costs.
Rigidity and zero backlash are essential for the locating bearing supports in the paper-guiding cylinders of sheet offset printing presses. INA’s bearing unit DMF, which is predrilled for flange mounting, meets these requirements in an ideal way.
The unit consists of a double row precision cylindrical roller bearing with two integrated thrust needle roller and cage assemblies. These can support all forces. The extremely high radial and especially axial running accuracy as well as the high rigidity in both directions offered by this design ensure very high printing quality, particularly when the cylinders operate at half speed. The integrated seal and the flange cover make installation easy and eliminate the need for additional components.