A Dremel tool is a very handy tool to have around the home. With its many attachments, you can perform a multitude of tasks, such as sharpening your lawn mower blade. After repeatedly mowing your lawn, the blade will slowly dull. A dull blade will rip your grass instead of cutting it cleanly, which can allow fungus and disease to penetrate the lawn. Sharpen your lawn more blade at least once a year to keep your lawn healthy and to reduce wear and tear on your lawn mower.
Remove the lawn mower blade according to the removal instructions in the operation manual. A typical lawn mower has a single bolt that holds the blade onto the engine shaft.
Clean the lawn mower blade with a steel brush. Scrub it thoroughly to remove old grass debris and rust.
Clamp the lawn mower blade down in a table vise. Install the sharpening attachment into your Dremel tool.
Turn the Dremel on and sharpen the lawn mower blade following the blade's original bevel as close as you can. Sharpen until the edge is smooth, clean and free of nicks.
Remove the blade from the table vise and balance it in the exact middle. Look to see if it tips in a certain direction. If it does, clamp it back down into the table vise and remove a little more material from the heavy side. Check for balance again and repeat as necessary.
Reinstall the lawn mower blade on to the lawn mower. Start the lawn mower and ensure there is no rattling or vibrations--signs of an unbalanced blade.