Perfect runout and very high accuracy
INA’s cage-guided needle roller bearings have played a major role in promoting the use of rolling bearings in printing machines. The now classic design of main cylinder non-locating bearing supports in offset printing presses has been based on a Schaeffler solution for 50 years – the double row needle roller bearing with offset cage pockets. Whenever higher load carrying capacity is required, multi-row, high-precision cylindrical roller bearings are available.
The benefits of this non-locating bearing support are its high radial rigidity, very low friction and perfect axial displacement capability. This design is particularly suitable for plate cylinders with an axial register function.
Innovative developments for main cylinder bearing supports in offset presses include completely clearancefree multiple-ring bearings DML.. with single or double eccentric. A typical application for this product is in rubber cylinder supports, which have to work at a very high level of precision and runout accuracy.
Beyond just acting as bearing supports for the cylinder, these multiple ring bearings allow the centre distance between cylinders to be changed, for instance in switch-on and switch-off operations or to compensate varying paper thicknesses. This task is carried out by integrated eccentrics with rolling bearing supports: low-friction, reliable and clearance free. Sealed efficiently and filled with a special grease, the pivot bearing supports are maintenance free – an ideal situation for ensuring the best printing quality in the long term.
In many cases, this modern design can do without cylinder bearers for rubber and plate cylinders.
This reduces costs and improves the reliability of your printing machine.