At every point in the process of going from pulp to print these bearings have to meet the highest standards. In the initial phase of creating paper the rolling bearings in a paper machine must meet extreme requirements: Moisture, very high temperatures, shaft deflections, high speeds and long running times.Use of spherical roller bearings that conform to E1 design with superior load carrying capacity, low operating temperatures and high service life. Also should conform to running accuracy specifications T52BW.
The process of converting paper into a usable form has very different bearing requirements. Slitters and rewinders require high speed ball bearings and linear motion bearings that have high running accuracy.
Special Solutions: Use of ‘free running’ insert bearings and pillow blocks. These have modified seals and slingers on both sides which allow for low start up torque and effective sealing even in high heat applications. Printing on paper is the final phase. To achieve the required pin sharp print quality you must have high precision and wear free bearing supports for the print rollers. This insures that the impression cylinder is supported with as little clearance, and as much rigidity as possible and with very few runout errors. The NAO style needle bearing with offset cage packets has become the standard. Needle rollers, Cam Followers and yoke rollers are used extensively in the distributor roller drives, gripper shaft controls and throughout the presses