Calender Roll Surface Run-Out may actually be the bearings

Calender roll bearing smay have excessive run-out. The result is the same as, and will appear as calender roll surface run-out. Excessive bearing clearance will result in the roll shifting during operation as roll separating forces vary.

These conditions will adversely affect the ability to control the calendered gauge.

When investigating run-out issues, check the calender roll surface AS WELL AS the bearings!

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