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M-2, Karbo Krome®, and Badger Knives
M-2, Karbo Krome®, and Badger Knives / Maximum Profile Depth / Moulder RPM
Bak-Pak® and Euro Bak-Pak Carbide Knife System / Maximum Knife Projection

knife degree bevelsGrinding M-2, Karbo Krome®, and Badger Knives

When grinding moulder and planer knives, factors such as grinding wheel types and grit are often a matter of personal preference. A grinder operator may be able to get the same results using different abrasives by altering the RPM of the wheel and the rate of feed. There are, however, some important guidelines that should be followed in order to guarantee the safest and best operation.

Always be sure to read the operation instructions for your grinder as well as any information from the manufacturer of your abrasives and grinding wheels. Be sure to observe all safety instructions with regard to protective devices and proper ventilation.

Whether you choose to grind using a single wheel, or rough grind with a coarse wheel followed up with a finish grind, the knife bevel that you maintain will play an important role in your success.

Generally, a 35 degree bevel will give the best results for most planing or moulding applications using High Speed steels or Karbo Krome. See illustration.

Grinding OPTI® Knives

When using Opti knife, the best results are achieved when the knife is ground to a 45 or 50 degree bevel, or in other words, a more "blunt" bevel that leaves more knife material at the cutting edge.

Never grind or hone the face on Opti knives as this may remove the ultra hard surface of the knife. A better finish will be obtained on Opti knives if the grinding wheel RPM is increased by 500 RPM for the rough and finish grind.