
aug 22, 2011 the last time i had my mower blades sharpened, it was $8 each. thats about half the cost of a new blade, and up considerably from $3 a decade ago. so its time for me to get a bench grinder so i can sharpen my own blades. these are the blades on my mid mount mower, not the big mx6 rotary cutter. i got a flyer from northern tool with some,garden guides diy lawnmower blade sharpener,nov 09, 2010 disconnect the mowers spark plug wire from the spark plug, and remove the lawn mower blade from the drive shaft. place one edge of the lawnmower blade against the grinding wheel of a bench grinder (one that is turned off), and adjust the angle of the tool rest until the beveled cutting edge of the blade is resting flat against the grinder.