L.A. Grinding is proud to offer our California, Nevada and Arizona customers an extensive inventory of both slitting blades and perforating blades for a variety of different folding machines. All of our slitters and perforating blades are made exactly from OEM specifications. L.A. Grinding offers these slitting blades in either regular carbon steel or high speed steel, which will prolong the lifetime of the slitter blade.

L.A. Grinding offers our CA, NV and AZ customers guidance in selecting the right industrial knives for the cutting job, matching the right slitter blades to your chosen method of slitting. Our staff has also worked with many different customers to come up with the perfect custom slitter or perforated for their special applications.

Here are some quick tips to remember when choosing between the different types of slitter knives:

“V” Shaped tooth:

  • Maximizes the distance between each tooth in perfs with a low number of teeth such as 6, 8, 12 or 18.
  • Increases the strength of the teeth in perfs with a high number of teeth such as 60, 72, 80 or more.
  • If the shaft is adjustable, a slightly wider perf cut can be made.

Crimping Perforator:

  • Holds sheets together temporarily.
  • Used for processing zig zag folded sheets on a gather–sticher and envelopes on a perfect binder.

Knockout (punch) Perforator:

  • Used when a printed product needs perforation in the spine for adhesive binding or air relief.

Reverse Tooth:

  • Assumes blades are placed on upper slitter shaft.
  • Holds fold together on 16 page books.

Round Tooth:

  • Good for perforating multiple sheets at a time.

Other Types of Slitting Machine Methods:

Burst or Razor Slitting:
Burst slitting is generally used when slitting materials that have an even level of thickness, such as: foils, films and textile products. Razor slitting involves a single knife cutting process in which an extremely sharp, ultra-thin slitting blade (circular or straight), is held in position while a sheet of material is drawn over the slitter blade. Razor slitting is inexpensive to set up and operate, as well as easy to adjust; however, razor slitting can make it difficult to manage intimate slitting accuracy.

Score or Crush Cut Slitting:
Crush cutting is the second method of slitting. This method of slitting is considered best for applications that involve materials of uneven thickness. The score slitting process requires only one circular knife to sever one part of a particular material from another. The cutting blade pinches against a hardened platen or bottom roll with about 70 PSI of pressure. Like razor slitting, crush cut slitting is inexpensive to set up and operate; however, crush cut slitting runs slower feet per minute and often results in poor cut quality.

Shear Slitting:
The third type of separation is shear slitting. Sheer slitting is generally used for fine paper, foils and films. Shear slitting involves top and bottom slitting blades that work in union to form a scissor cutting action that separates the material. Though sheer slitting is costly to install and maintain, this type of slitting allows for high speed rates of cutting and the finest edge cut quality attainable.

In addition to slitter blades, L.A. Grinding sells all types of industrial knives and offers complete knife sharpening services for customers in California, Arizona and Nevada. LA Grinding will sharpen your slitter knives, reconditioning perforated blades to their original density, so your slitting knives can continue to function with a high degree of precision for years.

If you are based in California, Arizona or in Nevada and you need to purchase or sharpen a slitter knife, contact us today for immediate service and consultation.

IN ARIZONA, PLEASE CALL: 1-623-780-9134