Proper Angle to Sharpen Lawn Mower Blades? (New And Old Mowers)

We all know the importance of keeping our lawn mower blades in good shape to ensure a smooth cut for our grass.

But what about when it comes time to actually sharpen? We don’t know an important point, “the proper angle to sharpen lawn mower blades.”

According to our research, the proper angle depends on the cutting edge of your blade, but it can vary between 15° – 45°. You have to check your mower blades then you’ll be able to find out the proper angle to sharpen it. 

Still confused? Wait, there’s no need to panic; we’ll share everything about blade edge angle in detail.

So you can sharpen the lawn mower with the proper angle. Let’s dive into the topic!

Which Is the Proper Angle to Sharpen Lawn Mower Blades?

The proper angle to sharpen the lawn mower blades completely depends on the edge.

If you’ve ever focused, you’ll see that the blade’s edges have a specific angle (between 15° – 45°). And this angle can be different on another blade. 

If you don’t sharpen the mower at the correct angle, the blades won’t be as effective as before, and they will not cut the grass evenly.

This situation is problematic because it can ruin the perfect green scenery of your lawn. 

The best way to solve this issue is first to determine the angle and then sharpen the blade of the mower. To do this, first, remove the blades from the mower. 

How to Determine the Angle of the Lawnmower Blade?

Determining the proper angle to get sharp blades isn’t difficult as people assume.

You only need the right tool, like a blade angle gauge; it’s affordable and eliminates the process of guesswork. 

Put the black clip side on the blade’s edge, and the tool will show the proper angle of your mower blade. 

But there’s a small issue if the blade is old and you’ve been using it for a long time; there’s a high chance it won’t be at the right angle. 

Therefore, if the tool shows a 42-degree angle, it must be around 45° because it must have worn out in the last few years.

Hence, you should sharpen the blade at 45°, not 42° or around 40°. 

Also Read: How to Sharpen a Lawn Mower Blade Without Removing? [3 Easy Solutions]

How to Sharpen the Lawn Mower Blades?

Now you know the proper angle of the mower blades, but what the next steps are? 

It’s time to sharpen the blade’s edges using tools like sharpening stone, metal file, angle grinder or bench grinder, or anything that suits you best. 

• Once you get the sharpening tool, put the lawnmower blades on a stable surface. 
• Use the tool and start the sharpening process at a specific angle. 
• Sharpen the blades until you get the required sharp edges. 

Though the choice is yours, we think a bench grinder is far better for sharpening blades than any other tool. You can watch the video below to understand how it makes work easier. 

After sharpening the blades, use a balancer to check whether the blades are even or not.

If not, repeat the sharpening process again, but from the heavy side to balance the blades of the mower. In the end, install the lawn mower blades. 

Read Also: (Expert Guide) Ryobi Lawn Mower Blade Not Spinning 

Frequently Asked Questions (FAQs)

Should the lawn mower blade be sharp to the touch?

No, a lawn mower blade should never be razor sharp that it cuts the hand wherever someone touches it.

The blade is made to cut the grass, so the sharpness should be according to it. 

Can you sharpen the mower blades wrong?

No, you can’t sharpen the mower blades wrong because if you do, the blades won’t work perfectly.

The reason is that sharpening the blades in the wrong direction will damage the edges that cut grass. When the edges don’t work, the blades are of no use. 

What is the maximum angle of a lawn mower?

The maximum angle of a lawn mower is 45°, and the minimum is 15°, but you’ll usually find a variety between the 30° angle blades because this is standard blade size.

Conclusion

The usual proper angle to sharpen lawn mower blades is between 15° – 45°. You’ll not find angles below 15° and above 45° in the mower blades category.

And to find the right angle, you need to use a blade angle gauge. 

The angle gauge will show you the right angle, and the rest of the work will be easy. Just use the sharpening tool and start the process of sharpening lawn mower blades.