How Can I Tell When My Mower Blades Need To Be Sharpened?

While the table above is certainly a helpful reference, it’s more important that you learn what indicators to look out for so you know when it’s time to sharpen your mower blades again, even if “the data” says it’s not time yet.
When looking at the mower blade itself, look for any obvious dents or major scratches. You’ll likely see hairline nicks over time, but very small nicks can be worked out during sharpening. However, if you notice bigger dents or nicks that have bent even a tiny portion of the blade up or down, it’s unfortunately time to replace the entire blade (find a replacement blade here).

Another indicator to look for is the grass itself. Look closely at the blades of grass to see how clean of a cut the mower made. If you notice that the tips of the grass blades look torn and ragged, that probably means your mower blades should be sharpened.

How Can I Make My Mower Blades Last Longer?

You may have pieced together the answer to this question from what you’ve read so far, but just to be clear, here are a couple pointers to keep in mind to help keep your mower blades lasting as long as possible.
First of all, before you begin mowing, look around the lawn for any big sticks, big branches, stones, rocks, or little toys (if you have kids) so that you don’t accidentally run over them while you’re mowing and mess up the mower blades. Remember, messing up the mower blades means you’ll need to replace them, not simply sharpen them.

Second, make sure you remember to sharpen the blades frequently (I recommend every 20-25 hours of use) and don’t assume that it’s time to replace the blades if you haven’t tried sharpening them first.

Lastly, make sure you learn how to sharpen your blades properly so you don’t accidentally wear off more of the blade than is necessary. In other words, if you sand off too much of the blades each time you’re sharpening them, before you know it you’ll have to replace the entire blade.

Post time: Oct-09-2021