We often comment on the importance of keeping tools sharp. Such tools as chisels saw blades and drill bits work more effectively, and are easier to use, when sharp. Our mantra: "A well sharpened tool is a safer tool."

One fact we must emphasize is how much better a well-sharpened tool works. Force isn't needed. A sharp chisel will glide through even the hardest chunk of wood, and a properly sharpened handsaw requires less physical energy to yield a straight, smooth cut. Not only is it easier to use a well-sharpened blade or bit, but what you are crafting will look better too.

Your lawnmower blade can use a good sharpening from time to time, as well. If you have a rotary mower, sharpening your blade is definitely something that you can do yourself.

If your lawn turns white after a mowing, it's time to sharpen your lawnmower blade. The white cast occurs when the blades of grass are torn rather than cut – the sign of a dull blade. The torn fibers at the tip of each blade of grass dry out and turn white. Cleanly cut blades of grass aren't damaged, hold their chlorophyll and remain bright green.

The sharpening process for rotary mowers is simple and shouldn't take more than about forty-five minutes. First, you'll want to remove the blade from the mower. Begin by emptying the fuel tank and disconnecting the spark plug wire. We don’t want the mower to begin mowing while the blade is being removed. Here’s what to do:

1. Holding the blade in one hand, use a wrench to loosen the nut that holds the blade in place.

2. Turn the nut counterclockwise to loosen it.

3. Some mowers have holes that align in the blade-housing and the blade. By inserting a screwdriver shaft into both these holes at the same time the blade will be held in place freeing both of your hands, and making it easier for you to loosen the blade-retaining nut.

Note: It's always toughest the first time. If you have never removed the blade before, loosening the nut may be a bit difficult. A cutting oil lubricant such as WD-40 or Liquid Wrench could be helpful. Use the cutting oil freely at the threaded portion of the shaft that holds the blade in place. You might try using a larger-than-normal wrench. Tapping the end of the wrench handle with a hammer also might help loosen the nut. A light tap directly to the nut itself may also help.

Once the blade is off, you can use a hand file, a grinding stone attached to an electric drill or a bench grinder to sharpen the blade.

If you decide to use either of the electric alternatives, be sure not to let the grinding stone cause the blade to heat up. Keep a large bucket of cold water close by. Frequently dip the blade into the water to keep it cool. Overheating the blade will remove its temper, and it won't hold a sharp edge for as long as it once did.

Safety Note: Be sure to wear safety glasses or goggles when working with grinding tools.

Once the blade has been sharpened, test its balance by inserting a screwdriver or a nail in the center of the blade. Grind off one side of the blade or the other to make sure that it is in balance. A blade that is out of balance could do severe damage to the mower motor.

Before you reverse the removal procedure and reinstall the blade, make sure to wipe it completely dry and rub it down with a coat of machine oil. This will help to retard rust. The result should be the greenest cut you've had in a long while.