The dry calender stack of a paper machine is a key factor that influences the final quality of the sheet. When the hydraulic load support system presses the paper in the calender stack, it must deliver the correct thickness, smoothness, and gloss while keeping the sheet’s strength intact. Too much pressure can weaken the paper and cause problems such as barring, while too little pressure can compromise the finished product’s appearance and performance.

Precision Roll Grinders services rolls to a tolerance as precise as 40 millionths of an inch. Calender stacks with precision ground rolls keep paper sheet properties within specification while the calender stack loading is reduced.

A linerboard mill installed dry stack calender rolls precision ground by PRG. Due to improved controls of paper quality metrics, machine operators were able to decrease dry stack loading by more than 8%.

Precision Roll Grinders is the premier servicer of calender rolls in the paper industry. Our precise tolerance roll grinding capabilities ensure paper machines run with precision. PRG also offers journal repairs, roll rebuilds, leak testing, hot and 3D grinding, dynamic balancing and other roll services.

Contact Precision Roll Grinders to learn more!