Professional Blade Sharpener for Lawn Mowers: 9 Best Steps for Sharpening Without Removing

How to use a professional blade sharpener lawn mower? Do lawn mower blade sharpeners really work? Let’s see the answers below, so keep reading.

Maintaining a sharp blade on your lawn mower is critical for maintaining the finest possible condition of your grass. Blades that are dull struggle to cut through grass and shred it instead. This causes discoloration, illness, bugs, and a poor lawn overall. If you want to buy a professional blade sharpener, you could check out this article: Best Riding Lawn Mower Blade Sharpener.

How to Sharpen Lawn Mower Blades: Use a Professional Sharpener  

Professional blede sharpener
Professional blade sharpener

Before mowing their grass, it’s fairly uncommon for folks to neglect to sharpen the cutting edge of their lawn mower blade. On the other hand, mowing with dull blades can harm not just your grass but also your lawn mower.

The right method to sharpen lawn mower blades is to pull them out of the mower and sharpen and balance them all at the same time. Some property owners, however, are unable to remove their blades.

This could be due to a lack of tools, rust, or just a lack of time. Whatever the case may be, how to sharpen lawn mower blades without removing them begs the issue.

What’s the Best Way to Sharpen a Lawn Mower Blade Without Removing it?

A lawn mower blade can be sharpened without having to remove it. Normally, you’d remove the blade to sharpen it, but you can do it while it’s still attached to the mower.

Sharpening your lawn mower blade with a professional blade sharpener while it’s fastened on necessitates a somewhat different procedure than regular blade sharpening.

Professional blade sharpener
Professional blade sharpener: sharpening without removing

Sharpening Lawn Mower Blades Without Taking Them Apart using a professional blade sharpener:

  • Remove the spark plug hood, wire, or battery from your mower.
  • Turn your lawnmower over on its side (the right way).
  • With a scrap of wood, brace the mower.
  • Remove the blade and clean it.
  • The blade should be blocked or locked in place.
  • Begin by grinding the blade’s top edge on one side. Ensure that you grind
  • At a 45-degree angle away from the middle
  • Reverse the procedure on the opposite side of the blade.
  • You’re good to go as long as the blade is properly fixed.

Why Sharpen Lawn Mower Blades?

Professional blade sharpener 1
Is it important to sharpen the lawn mower blade? Find the reason before you use a professional blade sharpener

Pay close attention to the sharpness of the blades of the lawn mower you use if you want to maintain a healthy lawn. Sharp blades, when combined with the proper rotational speed, offer a sharp and even cut on your grass. Consider lawn care with a blunt mower to be similar to a smart haircut with a blunt shaving machine.

Quality comes at a cost, and the cost of a smart lawn is outstanding lawn mower care, beginning with the sharpness of the blades.

How do you maintain the blades on your lawn mower sharp?

It’s all about understanding when to sharpen and when to replace your lawn mower blades to keep them sharp. Sharpening your blades with a professional blade sharpener should be done after 20 to 25 hours of use on average.

Replacement can be done every 100 to 200 hours, depending on the amount of damage the blade sustains during typical use. It’s time to replace your blade if you’re getting uneven cutting after sharpening and leveling it.

Is it necessary for a lawn mower blade to be razor-sharp?

No, razor-sharp is TOO sharp, and this is something you want to avoid. Over-sharpening a blade thins down the metal, leaving it more vulnerable to injury and dulling it faster than it would with normal sharpening. Sharpen it to the same edge it had when it left the factory, which should be about as sharp as a butter knife.

When sharpening a lawn mower blade using a professional blade sharpener, what angle should it be sharpened at?

For sharpening, you should hold the file at a 45-degree angle, but individual blades may require a different angle. The best thing to do is to hold your file against the existing angle, which will always give you the correct angle.

What is the purpose of a 30-degree blade sharpener? It’s a professional blade sharpener grade that’s frequently used by landscapers to sharpen their mowers. It also has the ability to sharpen lawn mower blades to a uniform 30-degree angle.

Is it necessary to sharpen new mower blades?

A new mower blade that you’ve just bought or that arrived pre-installed won’t need to be sharpened. Lawn mower blades are pre-sharpened by the manufacturer, so feel the edge to get an idea of the ideal sharpness, and then sharpen it yourself every 20 to 25 hours of usage.

Tips for You :

  • You don’t sharpen a mower blade on both sides. Sharpening the blade should only be done on the top side of the actual cutting edge, and the blade should be balanced thereafter. If you have a specialist blade with teeth in the design, such as a Gator, leave them alone and sharpen the cutting edge in the same way you would a conventional blade.
  • It is necessary to rebalance mower blades once they have been sharpened. Imbalanced blades may cut unevenly, increase mower vibration, and may cause damage to the blades and perhaps the mower itself if used continuously. Always balance your blades immediately after sharpening them to get the most life and performance out of them.

Is it possible to sharpen ride-on mower blades?

Yes, you certainly can. These are fastened by a bolt underneath your riding mower, so you may remove the blades to sharpen them after elevating the mower to gain access.

Mark the underside of the blades with a marker so you know how to reinstall them properly. After cleaning the blades and clamping them in a vice, you should be able to sharpen the working edge with your preferred tool.

Check out our article for more tips on sharpening mower blades.  


Sharpening a mower’s blades with a professional blade sharpener is simple. If you don’t know how to do anything, hire a specialist to do it for you.

Don’t worry if you use an Automower or robotic lawn mower, you can find out about that in our article on when to change Automower blades.

More Related Articles

Was this helpful?

Thanks for your feedback!