How to Sharpen a Mower Blade With a Dremel


Many people water, fertilize and weed their lawns in an effort to keep them healthy and green, yet they overlook one of the easiest things to prevent disease in their lawns--a sharp mower blade. Dull blades tear the grass blades instead of cutting them, leaving ragged edges that are susceptible to disease. Taking the time to sharpen your mower blade when you begin to notice torn grass blades can add to the overall health and appearance of your lawn. Thanks to the Dremel, a small, handheld rotary tool, you can easily sharpen a mower blade in a few minutes. Simply insert a metal grinding bit, and you are ready to sharpen. The compact design of the Dremel means it can safely be wielded with one hand, and the many battery-powered versions of the Dremel allow it to be used anywhere.

Step 1

Insert the grinding bit into the collet of the Dremel. Press the spindle lock button near the tip of the tool with one hand, and tighten the collet nut with the supplied collet wrench, using your other hand.

Step 2

Clamp the mower blade securely to the edge of a table. You also can place it on a step and use your foot to hold it in place, but use caution with this method.

Step 3

Sharpen one edge of the blade by running the grinding stone from one end of the cutting edge to the other. Hold the Dremel perpendicular to the length of the mower blade.

Step 4

Turn the blade over, and pass the Dremel over the back face of the cutting edge.

Step 5

Continue alternating between the front and back faces of the blade until the blade is sharp. This should take only two or three times on each side. Because of the high speeds at which mower blades operate, they do not need to be as sharp as a knife or chisel to operate properly.

Step 6

Repeat the process for the other cutting edge on the blade.

Tips and Warnings

  • Wear safety glasses, as the grinding wheel may throw sparks toward your face.

Things You'll Need

  • Dremel rotary tool
  • Dremel collet wrench
  • Grinding bit
  • Clamp


  • Douglas Steele; Doug's Lawn Care; Birmingham, Alabama
  • "Complete Guide to Sharpening;" Leonard Lee; 1995
Keywords: Sharpen mower blade, Dremel grinding wheel, mower sharpening attachment

About this Author

Vance Holloman is a residential contractor and freelance writer living in Atlanta. Much of his writing centers on the expertise he has gained from two decades in the construction industry. His work has appeared in newspapers, magazines and numerous online sites, including and "Auburn Plainsman." Holloman has a Master's degree in business from the University of Maryland.