Severe thermal run-out can be introduced during warm-up of the calender if it is not kept running. Remember that the calender gap will be reduced as the rolls grow (get larger) as their temperature … [Read more...]
More Calender Run-Out problems – Roll Water Passage
September 6, 2008
Most modern calender rolls are the drilled type. This means that water passages are drilled across the roll face under the surface. This effectively forms a radiator-like heat exchanger around the … [Read more...]
Calender Roll Surface Run-Out may actually be the bearings
September 6, 2008
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 … [Read more...]
Calender Rolls Seem to be Erratic? Check for Roll Eccentricity!
September 6, 2008
Calender rolls must be round and free of run-out at ambient temperature. Any run-out of the individual calender rolls will be amplified as the high spots and low spots periodically match up between … [Read more...]
