I do all of mine at the beginning of the season only using a hand file. I have a Dremal attachment, bench grinder and angle grinder but still go back and do them the way I started many years ago. The Toro and Deere blades have good steel in them so really little more then a touch up is needed. The replacement MTD blade I have is pretty soft though. But it is only used for a few minutes of trimming every week or two.
Now back on the old grandparents farm mowing field grass, weeds, and cow patties was a different story.
We took the bench grinder to them at least a couple times per season. Sometimes they still looked about like a dull boomerang by the time we pulled them.
Now back on the old grandparents farm mowing field grass, weeds, and cow patties was a different story.
We took the bench grinder to them at least a couple times per season. Sometimes they still looked about like a dull boomerang by the time we pulled them.