Rotary Cutting Rule

As corrugated packaging continues to evolve, more demands are being placed on diemakers to produce dies that cut everything from F-Flute to Triple Wall. We understand that proper rule selection plays a vital part in the successful diecutting of any grade of corrugated. That is why National offers fourteen styles of rotary cutting rule; each specifically engineered to provide optimal diecutting performance.

Every style of rule designed by National is evaluated to see how it performs using the following criteria:
  1. Pressure required to cut a given material.
  2. Penetration into the blanket.
  3. Appearance of the edge after diecutting.
  4. Longevity (wear) of the rule.
  5. Bendability.

It is very easy to design a product that will provide maximum performance on any one of these variables. The challenge comes in engineering products that excel in a given area while performing well on the other four elements.

There are four characteristics of all rotary rules that determine how well a product will perform:
  1. Pitch - Pitch refers to the number of teeth per inch. Generally speaking less teeth per inch will cut with less pressure while more teeth per inch will result in increased pressure.
  2. Geometry of Tooth - The geometry or shape of the tooth will affect both the cutability and bendability of the rule.
  3. Depth of Gullet - Gullet depth is a key factor in determining the longevity of the rule.
  4. Hardness - The temper of the rule will determine the formability of the rule as well as affect longevity
The key to National's success is to understand the problems that diemakers and diecutters face, and to understand how to vary these four characteristics to solve their problems. While National manufactures fourteen styles of rule, the variations of bevels, hardnesses, and tooth styles provide an infinite variety of cutting rules that can help meet the challenges today's diemakers and diecutters face.

While the ability and desire to custom manufacture rule to meet the changing demands of the industry is what National is all about, we recognize that not all jobs need a custom designed product. We maintain the largest inventory of standard cutting, creasing, and perforating rule for rotary dies in the industry. One of the most common questions we are asked, is whether a particular product is available. This website is designed to provide a guide to what products are available from National. The chart below shows what rotary cutting rules we consider to be standard products that are usually available for immediate delivery.



Straight rule is available in coils, 30", 36", 48" and one meter lengths.

Standard curvatures: 37 1/2" (257 mm), 38" (279 mm), 50" (360 mm) and 66" (487 mm).

Standard back notch: N1, 1/2" (12.7 mm) centers, 1/2" (12.7 mm) deep.