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Lawn Mower & Lawn Edger Blades |
Edge Angle
Lawn Mower Blade On Lawn Mower blades, sharpen the upper side of the blade's leading edge. The areas to be sharpened are highlighted in red. |
Lawn Edger Blade On Lawn Edger blades, sharpen the side of the blade which is the leading edge. The areas to be sharpened are highlighted in red. |
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When the world wearies and society fails to satisfy, there is always the garden. Minnie Aumonier |
Care must be taken to ensure the blade remains balanced (i.e., ensuring that the removal of metal during the sharpening is equal on both sides). For this reason (and many others), it is highly recommended to perform the sharpening of the blade after removing it from the mower or edger.
New blades probably will not need reshaping. However, if a nick is in the edge, this may be needed.
If you use an angle grinder, consider using a 120 grit flap disc. A metal grinding wheel may be needed for large-scale shaping. In either case, be sure to not overheat the metal too much: it weakens the metal.
Use a machinist’s hand file.
Example icon
Sharpness scales (as shown in the grey icon to the left) are used to indicate the recommended sharpness for the blades noted above. You can click on any of the icons showing the sharpness scale and be redirected to the page describing this more. Lower numbers are duller; higher numbers sharper.
These are general recommendations; you will need to use your own judgment, based on the knive’s intended purpose.