For rotary cutting rule to perform during the diemaking and diecutting processes,the back notching must be accurate, burr free, and specific to the appplication. Most curved rule for 50” and 66” rotary diecutters is made with a back notch that is 1/2” (12.7 mm) deep on 1/2” (12.7 mm) centers for an accurate method of determining bridge placement.
When bending a circle for a rotary diecutter, you can improve the seating of the rule by specifying a closer notch, such as N2. When ordering curved rule for cylinders under 9” (228 mm), you can improve the seating of the rule by specifying close notching. We can alter the depth of the notching to suit your application.
Proper rule seating is critical to prevent premature rule failure. Accurate back notching along with National’s Accu Curve system are two of the best ways to assure the rule seats properly on the cylinder.