How many times can you sharpen lawn mower blades?

For most rotary (motorized) mowers, I recommend sharpening the blades every 20-25 hours. For a lawn that takes about 45 minutes to mow, that means you should sharpen your mower blades every 26-33 mowing sessions.Click to see full answer. Considering this, how many times can you sharpen a mower blade?Your lawn mower blade is dull. Sharpen the blade twice each season to help maintain a green, healthy lawn. A sharp blade not only cuts blades clean so grass plants recover quickly, it helps reduce your lawn mowing time. when should I sharpen my mower blades? So in conclusion you don’t need to sharpen your blades every time you cut your grass, however you need to do it more often than you’re probably initially thinking, and a good rule of thumb is every 25 hours of grass cutting time go ahead and invest in putting a nice clean sharp mowing edge on your blade. Subsequently, one may also ask, can you sharpen blades while still on mower? Although you can probably do an okay job sharpening them while on the mower, there is no way for you to balance them on the mower. Even a small vibration from them can really wear things out on a mower over time. Take them off and sharpen them, that’s the only way you can see if the blade is balanced.Should I sharpen my lawn mower blade or buy a new one? When to Replace Mower Blades Lawn mower blades are built for durability and can usually be salvaged with regular sharpening. However, if you notice large dents and chips on the edge that aren’t smoothed out with a blade sharpener, it’s time to invest in new blades.