Blade Longevity - American Cutting Edge
Visit Our Website!
Join Our Mailing List

Cutting Edge

CB Manufacturing
(800) 543-6860

Blade Longevity

Customers often ask what they can do to increase the life of their machine knives and razor blades. While there isn’t a set in stone blanket answer for this question there are a few tips we can offer. It is important to note that not all ideas are appropriate to all applications. Many aspects go into a finished product such as knife material, coatings, environment, cutting substrate, geometry and surface finish of the blade, and the list goes on. If you are interested in getting better blade life, please read through the information below and contact one of our knife experts to discuss your options. 


One of the factors for blade longevity is the material in which it is made.  Your application and desired price point will likely dictate the best material for you.  Depending on what you are cutting you may need harder steel, or something with higher carbon content. In many cases there are different options for what material you can use. One material may get the job done for an acceptable period of time; however another material may work even better for an extended time frame.  For example CB Manufacturing has recently released a new product, our carbide inlaid densifer knife. This blade, with its carbide inlay could double in life from its non-carbide inlaid counterpart, and should give the user cleaner cuts.  There are many materials available that can be considered for each knife. Carbon Steel, Stainless Steels, High Speed Steels and Tool Steels are all options to discuss with your blade expert. Click here for more information about blade and knife materials.


In conjunction with the material of your knife you may be able to choose a coating that will make your blade last even longer. There are a slew of coatings available including Titanium Nitride, Boron Carbide, and Teflon just to name a few.  Each coating has a different use, for example Teflon is generally used to increase the lubricity of the blade surface and can be great for adhesive cutting applications while a Boron Carbide, more commonly known as ceramic coating, is generally used to add extensive wear life to razor blades, making the blade last 20+ times longer. Contact your Product Manager to discuss what options would be best for you and your application. For more information on coatings and how they interact with different steels you can also visit our website.

Hardness Vs Toughness

Another aspect of blade life is the hardness verses the toughness of the blade. Generally as hardness increases, toughness decreases. Toughness is desirable when blades are heavily impacted, hardness when a blade is exposed or abrasive materials. Hardness is a characteristic of a solid material expressing its resistance to permanent deformation. The Rockwell or Vickers hardness scales are most commonly used in the industrial blade industry. Toughness on the other hand is the maximum amount of energy a material can absorb before fracturing, which is different than the amount of force that can be applied. The key with industrial knives is finding that magical blend of hardness and toughness that will give a blade long life and good durability to stresses and impacts depending on the application. If you would like more information about this concept or would like to discuss your blades hardness or toughness please contact our knowledgeable blade staff. You can also visit our website for more information. 

Comments are closed.