The improved roll chamfer cutter has fixed the chronic problem of occurrance of linear marks on the tube surface, and brought about good result and considerable economic benefit.

There is a cutter and a perforator on the fill roll. The position of the cutter can be adjusted according to the sheet size. The perforator provides the foundation for sheet cutting.

There are experiential and calculating method for eccentricity calculation and it's decision on urethane anvil-roll of the rotary die-cutter.