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Score Slitting or Crush Cutting

 Score Slitter or Crush Cut Blades



  perforatorblade.jpg ck10077.jpg
  Perf Blade Print

Carolina Knife Co. manufactures blades and a wide range of accessories for machines utilizing the score or crush cutting process. Score cut knives, perforator blades, slitter shafts, through-hardened rolls or sleeves, and slitter knife holders are the most common score slitting products that we manufacture. All are available for standard score slitting machinery, and we also deliver rapid manufacturing of custom blades and accessories for businesses with unique score cutting needs. We manufacture both continuous edge and perforated score cut slitters in a wide range of tool steel. 

Get a Quote on perforator blades

scoreslittersshafts.jpg                 Score or Crush Slitting Explained 

Score slitter blades, also called crush cut blades, are used in a cutting process that involves passing a material between a blade and a hardened roll aka "sleeve". The material is essentially crushed into two separate pieces between the knife and the roll. Because of the constant metal on metal contact between the score cut blade and the roll, these blades don’t have a razor sharp edge, but instead have a rounded edge with a larger radius. This insures longer run times, as sharper blades would dull quickly creating an uneven cut. A score cut knife is used for continuous cutting applications, but is also ideal for perforating a material such as paper. Carolina Knife Co. manufactures all blades and accessories used in the score cutting process including a full line of perforator blades.



Score Slitter Shafts, Hardened Rolls, and Accessories

Slitter Blade Shaft





 Shaft Drawing 

Along with manufacturing the blades, we also manufacture or supply shafts, through hardened rolls, score knife holders and accessories such as cylinder housings, piston cups, piston forks, springs, stop blocks, axles, screws, spring pins, clamp pawls, spacers, and tubes.


through_hardened_sleeve.jpg               Why Through Hardened Sleeves?


Most people only consider the quality of the blades when purchasing industrial slitting equipment. At Carolina Knife Co. we take pride in crafting high quality parts. For this reason we insist on through hardening all of our sleeves and rolls used for score slitting. Inevitably your hardened roll will get worn down and develop grooves along the cutting surface. It is more cost effective to have these worn rolls resurfaced rather than completely replaced. Rolls hardened using standard hardening processes have a relatively thin layer of hard steel on the outside and once reground several times they will be useless as the softer steel becomes exposed. With through hardened sleeves you will be able to regrind them significantly more times before they need to be replaced.



Carolina Knife Co. offers a variety of Hardened Sleeves.







4" Sleeve Example

   6" Sleeve Example



Information Booklets

Material Selection

Material Selection Manual


Principles of Shear Slitting




Score Knife Booklet


Score Knife Chart