Circular Knives, Slitters & Slitting Knives - Toothed, Scalloped and Slotted Serrated Edge

Circular Knives, Slitters & Slitting Knives - Toothed, Scalloped and Slotted Serrated Edge
Machine knives for paper cores, fiberglass, food products, rubber, extruded products, product reclaiming operation

This type of machine slitting knife, rather than solely depending upon the sharpness of the edge in order to cut the product, have a toothed or slotted edge, also known as a serrated edge. This type of edge provides for a more aggressive cut. These circular slitters may also have a single bevel, double bevel, compound singe bevel or a compound double bevel in addition to the serrations. See these types of bevels in the circular/knife edge section.

slotted circular serrated slittersThe standard tooth designs are either a “V” shaped tooth or a “ slanted V” shaped tooth. The use of the different styles of teeth are determined by the type of product being cut. In additional to the bevels than are on the circumference of the knife, these teeth can be individually sharpened on either one or both sides of the knife and one or both edges of the tooth. See examples of these types of teeth in the following drawings.

In addition, slots of different configurations, can be added to the edge of a slitting knife. These slots act as small teeth, depending upon the slot design. This type of serration is less aggressive than a toothed knife while at the same time allowing soft products to be cut with very little product removal. They also allow other products to be cut more rapidly.

Because of how these types of knives are used, they must cut into the air or a slot in order not to damage the teeth or slots. Some dust or product loss can be expected when using this type of knife, but not nearly the amount a saw blade would remove. Also, these blades product a smother
cut than a saw blade.

In these types of applications, the knives cut through the product and into the air, slots or a soft supporting material. This is required because the serrated edge cannot be damaged or dulled by running against a hardened surface. The sharpness of the serrated edge and the rotational speed of the knife are what is required to cut the product.

Call and let us suggest possible design and material changes to your current product, or allow us to make suggestions when you are designing a new machine. A combination of the properly designed edge and use of the correct material might greatly increase the life of your knives.  Our normal delivery is between 3 and 10 weeks, which varies depending upon a variety of factors. It is not the 14-20 weeks needed when dealing with a foreign manufacturer. Remember  the real cost of cutting any product, is not the individual cost of the knife but the down time and lost production involved when changing the knives because they become dull.

Benefits of Toothed, Scalloped and Slotted Serrated Edge Circular Knives and Slitting Knives:

  • Higher production rates
  • Smother cuts
  • Higher cutting accuracy
  • Less waste  
  • Less downtime
  • Lower re-sharpening costs

These types of machine knives are used  for cutting:
• paper cores • fiberglass • food products • rubber • extruded products
• product reclaiming operations

We supply these types of knives in the following specifications:
3/4" to 36" (19 mm to 914 mm)(depending upon the type of material)
Thicknesses: .010" to 1.000" (depending upon the type of material & the diameter)
Thickness Tolerances: As close as +/- .0001" (+/- .0025 mm)

Types of Steel:

  • Carbon Steel (1075, 1095)
  • Chrome Vanadium Steel (CV)
  • Alloy Material (52100, A2, S7)
  • Semi-High Speed (D2)
  • High Speed Steel (M2 & M42)
  • Stainless Steel (410, 420 & 440-C)
  • Solid Sub-micron Carbide  

Applied Cutting Technology - P.O. Box 1927 - Midlothian, Virginia 23113 U.S.A. - Toll Free: 800-358-2240 • 804-355-4334 • Fax: 804-355-3371 -