ProParts Direct

Four things to remember before sharpening a set of mower blades

Sharpening lawnmower blades saves time and money, unless the technique is incorrect – that costs money. 

** Always use proper safety equipment and goggles, hearing, gloves. **

  1. Set the blade grinder to the correct angle. For Oregon replacement blades, use 30 degrees. OEM blades, consult your owner’s manual.
  2. For a right hand cut, set the motor to forward (counter clock wise) to draw the blade into the stone. This will throw sparks out to the right, away from the user.
  3. Your first pass should be to square up the blade.  This will remove any Knicks or chips in the blade.  Once you have set your edge then draw the blade across the stone until you have ground away the metal to meet the bottom edge. Flip the blade and repeat using the same number of passes. Do not attempt to get a razor sharp edge, a .030 - .060 is ideal.
  4. Balance your blade – it is a simple step, but very important when sharpening your blades. A simple screw on the side of your work bench or even a fancy blade balancer will do the trick. Balancing your blade can save you from having to replace your deck spindles prematurely.

A blade grinder is a great addition to any landscape company. By properly learning how to sharpen your own blades you can get a longer blade life, better cut and save money and time while doing it!