You have finally made the decision to replace your mower’s blade.
Maybe you feel it has been completely battered by the rocks or the usual foreign objects that you can’t miss in a lawn.
But upon receipt, it’s painted and doesn’t look razor sharp and so you feel that a round of sharpening may improve the cut.
But should you? Do brand new lawn mower blades need to be sharpened? how do you sharpen mower blades?
Here are a few pointers:
It’s true that a sharp blade will save your time and energy when mowing. It also ensures a super clean cut on top of helping to reduce the spread of infectious lawn fungus.
An excellent cutting edge doesn't imply a small(sharp) angle. In fact, for a healthy cut, what you need is not a razor-sharp feel but a perfect cutting edge.
And a fine cutting edge may even have several angles.
Here is the trick:
If the angle is too acute (at the apex), the blade won't have enough muscle to maintain the collision with overgrown grass and will easily bend, fold, and even nick.In any case, a number of users report that once they sharpen their blades "razor sharp" the edge folds over quickly rendering the blades dull after only a few cuts.
As I had mentioned, some gardeners feel that the paint coating make blades to seem not sharp enough and will always sharpen their new blades.
Other lawn owners will say blades are okay just right out of the box and that if you sharpen;they wear out and dull within a few uses.
Now, this is what you need to know:
A majority of the blades comes sufficiently pre-sharpened and balanced so you just install them and get down to work.
And the paint surely comes off soon enough.
However, it’s good to check their balance before installing.
I have actually been forced to do a bit of touching up to get blades balanced a couple of times.
That said, the factory edge has an almost perfect bevel angle and will do a thorough job without extra sharpening- at least for the major brands.
To know if your blades are ripe for sharpening, keep an eye on your lawn (after cutting) for these signs:
Always, the grass should remain green and have a smart clean line with minimal tearing.
You don’t lack choices when we come to sharpening:
Here is how to sharpen a lawn mower blade with a file:
If you own a mulching lawn mower, you may wonder how to sharpen a lawn mower mulching blade with a file or how to sharpen a curved lawn mower blade with a file.
Now, the good news is that the procedure for filing is almost the same and provided that you remember to file at an angle aligned to the beveled edge, the cutting edge will still emerge sharp.
Compared with a file, a bench grinder is easier to use and takes less time.
Here is how to sharpen lawn mower blades with a bench grinder:
Sharpening the blade at the wrong angle will make it to shine without making it sharp. To get the ideal edge, angle your blade toward the grinding disk.
So, what is the proper angle to sharpen lawn mower blades?
In most cases, an angle of about 35 to 45-degreesis recommended as the optimum when sharpening any blade though it varies with your brand.
However, if you can, always maintain the factory angle.
How frequently you should sharpen depends on:
As a general rule, monitor your grass appearance up close and also far away. If it looks immaculate, your blades are fine.
Otherwise, it’s time for honing.
The question “do brand new lawn mower blades need to be sharpened?” largely depends on the brand and your personal preferences.
But by and large, most of the manufacturers pack their blades ready for use and they will cut neatly right out of the box.
However, in some cases, you may find a blade too dull and be forced to sharpen for a smart cut.