Reduce Blade Wear, Increase 
Profits

The cause for blunt edges is typically excessive overlap. The further the upper blade projects into the web, the more it is subject to excessive erosion from the web. When we hear that someone is struggling with slit quality, this is the first factor to check. An operator will often increase overlap to ensure that the blades have good contact. Not only will this have a negative effect on slit quality, too much overlap decreases blade rotational speed and increases friction (or traction) between the upper and lower blade, slowing the upper blade in relation to the lower blade and subjecting the upper blade to increasingly more abrasion from the web.