Lastly, be sure you only sharpen the top side of a mower blade. Make sure the grinder throws sparks away from you. You can move the grinder in either direction along the blade as long as (important!) you maintain even pressure on the blade. You want your hand grinder running at full speed when it contacts the mower blade. When your grinder contacts the blade, make sure they make contact between a 45–65-degree angle. Make sure your hand grinder has a medium stone in place (not a fine or coarse stone). Color is your indicator, not sharpness or thickness. You want to go over it with a hand grinder until it takes on a shiny finish. Unlike with a kitchen knife, you don’t sharpen a mower blade until it can slice paper or comes to a fine point. Here’s some helpful background info from our experts before you start sharpening. With the blade parallel to the ground, tighten the vise around the center of the blade, so equal portions are exposed on either side. Open the vise so it is wider than the widest point of the blade. If you have multiple blades, you may want to mark them to indicate which side of your mower they came from, though it’s likely John Deere mowing blades are stamped “left” and “right.” 3. to remember which way it goes back on after you have sharpened it. Repeat, as necessary, for multiple blades.īefore removing it, you may want to mark the bottom of the blade with a touch of chalk, paint, etc. Twist the bolt counter-clockwise to remove it and put it in a secure place. Optional: place a wooden block against the mower blade and the mowing deck to stabilize the blade while you unscrew the bolt. 6-point sockets will fit John Deere bolts more securely than 12-point. Match the correct sized 6-point socket to the bolt securing the mower blade to the deck, then attach the socket to your ratchet. Whether you have a riding mower or a tractor with a separate mowing deck, our experts recommend jacking up your equipment and not trying to remove blades from a deck that isn’t attached to your tractor.
Now you can easily access the bolt, securing the mower blade to the mowing deck. Raise the mower as high as the jack will lift it, securing your equipment with jack stands underneath for stability. Place a floor jack (available at auto parts stores) underneath the front of your riding mower, making sure it makes contact at the proper lift points.
How To Make your riding mower the sharpest tool in the shed A step-by-step guide for sharpening your mower blades
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