Top 7 Best Lawn Mower Blade Sharpener Reviews (2021 Updated)

best lawn mower blade sharpener reviews

A lawnmower blade should be sharpened every 25 hours of use or twice per season to maintain its quality. Cutting grass with a sharp blade helps maintain a lush green lawn and reduces fuel consumption up to 25%.

Therefore, you should get the best lawn mower blade sharpener in your garage. This home tool makes blade sharpening more convenient and budget-friendly than sending your blades to a professional blade sharpener, using a manual sharpener stone, or replacing them with new ones.

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Top 7 Best Lawn Mower Blade Sharpener 2021

Product ImageProduct NameFeaturesPrice
All American 5005 Adjustable Lawn Mower Blade SharpenerBest OverallSee latest Price
RBG 712Best Rotary Blade SharpenerSee latest Price
Oregon 88-023 Lawnmower Blade SharpenerProfessional yet AffordableSee latest Price
Magna-Matic MAG-9000A Good Commercial Lawn Mower Blade SharpenerSee latest Price
Magna-Matic MAG-8000Best Professional Lawn Mower Blade SharpenerSee latest Price
Smith's 50603 Lawn Mower Blade SharpenerA Good Handheld Sharpener For Emergency UsesSee latest Price
Work Sharp Mk.2 Knife & Tool SharpenerA Good Electric Handheld Blade SharpenerSee latest Price

In-depth 7 Top Rated Lawn Mower Blade Sharpeners Reviews

1. All American 5005 Adjustable Lawn Mower Blade Sharpener – Best Overall

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If you are searching for a blade sharpener compatible with standard, mulching, and high-lift blades, All American 5005 is the right choice for you. Although it’s pretty expensive, it’s heavy-duty and versatile enough to grind many blades at multiple angles in commercial lawn work.

The first advantage of this American blade sharpener is that it has a clever design to make bulk blade sharpening jobs more time-saving and efficient. It has a vice head to keep the grinder firmly to ensure a proper sharpening result.

Besides, you can attach a standard 4 1/2-inch angle grinder to this sharpening machine with 4 adapter pins. If possible, you can also mount this sharpener to any flat surface with bolts or clamps as a permanent sharpener.

You can adjust and lock the sharpening blade’s angle between 15 and 45 degrees to get a precision sharpening result. In other words, you can use it for various blade types – both left and right-handed ones.

The 15-degree setting can be used to sharpen the mulching area of a bi-level mulching blade, while the highest 45-degree setting is appropriate for some lawn mower blades that tilt downward.

This automatic sharpening machine is compact and includes a cordless grinder. It’s also lightweight with a weight of 5.33 pounds. So, you can carry the product between your lawn and your storage place with ease.

Pros Cons
  • Compatible with all standard, mulching, and hi-lift blades
  • Adjustable angles of 15-45 degrees
  • Cordless, compact and lightweight
  • Quite expensive

2. RBG 712 – Best Rotary Blade Sharpener

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Instead of buying new blades every season or hiring a professional knife sharpener, you can utilize RGB 712 to get the job done in a few seconds. This beast is stable, powerful, and heavy-duty enough to get your lawn mower blades back to a factory flat edge.

This Rotary blade sharpener features a sturdy 11-gauge formed steel stand that can hold up to 5,000 pounds/m2. Hence, you don’t have to attach it to a table or a flat surface to work. It weighs only 5 pounds, so you can transport it to your working area or store it permanently in your office.

This blade sharpening machine boasts a robust electric motor with the horsepower of ½ HP and has a spinning speed of 1750RPM, which is capable of handling heavy-duty applications like sharpening multiple blades at the same time.

Its unique design with a 7-inch grinding wheel allows you to grind blades at any length for both standard (right-handed) blades and reverse (left-handed) blades.

Another great point of this machine is that it helps you eliminate most grinding wheel dust since all dust will fly far from you. However, you still need to wear eye protection glasses and gloves when working with this machine.

Pros Cons
  • Powerful ½ HP motor with a spinning speed of 1750 RPM for a stunning performance
  • Unrestricted maximum sharpening depth
  • The grinding wheel is replaceable
  • Quite expensive

3. Oregon 88-023 Lawnmower Blade Sharpener – Professional yet Affordable

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Oregon 88-023 is one of the most powerful electric sharpening options on the market. This machine provides the same electric power as the RBG 712, including a ½ HP motor and a maximum spinning speed of 1750RPM. But it slightly differs from the RBG 712 in its design.

This Oregon blade sharpener offers a user-friendly design, making it a valuable choice for non-professional knife sharpeners. You can use this machine to sharpen various types of lawn mower blades up to 6 inches.

It offers a rotary to adjust the handle and knobs for precise control and height adjustments. Additionally, you can use this machine to enhance the sharpness of both standard blades and reverse blades with a reversing switch.

Another point that sets this Oregon sharpener apart from the RBG 712 is that it’s manufactured with customer’s safety in mind. The built-in light allows you to see the tool clearly in foggy weather or dark. Additionally, the on/off safety switch prevents accidental start, which might be helpful if kids are around you.

A drawback of this sharpening machine is that it has a grit collector to store the metal dust, but you have to purchase it separately.

Pros Cons
  • Powerful engine
  • Can sharpen large blades up to 6 inches
  • Built-in light for easy and safe working in low-light conditions
  • Hard to get the right angle
  • The grit collector is not included

4. Magna-Matic MAG-9000 – A Good Commercial Lawn Mower Blade Sharpener

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Proudly made in the United States, Magna-Matic MAG-9000 is a reliable choice for professional lawn care. This sharpening machine comes fully assembled to let you start sharpening your blades right away. You can use it to sharpen conventional lawn mower blades to a 30-degree angle with a single-direction motor.

How fast can you sharpen a conventional mower blade? According to the manufacturer, it takes only 1-2 minutes to get a blade a second life thanks to the industrial ½ HP, 3450 RPM electric motor.

Another amazing thing about this commercial-grade sharpener from Magna-Matic is that it can sharpen both left and right-handed lawnmower blades. Thanks to the specialized spinning wheel and the worktable, other surfaces of the blades won’t be affected. The wheel won’t also burn the blades or need extra wheel dressing.

You can use this sharpener as a portable tool on the go as it has a top handle for easy transportation. Or, you can leave it in one place without bolting it down. This machine comes with an ultra 7-gauge steel body with a powder-coated finish to maintain its appearance for quite a long time.

Pros Cons
  • Made in the USA
  • All safety guards and tools included
  • Powerful ½ HP motor
  • An industrial-grade spinning speed of 3450RPM
  • More suitable for professional lawn mowers
  • Consistent angles (30 degrees)

5. Magna-Matic MAG-8000 – Best Professional Lawn Mower Blade Sharpener

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MAG-8000 is the upgraded version of MAG-9000. This industrial-grade blade sharpener can maintain a consistent 30-degree angle like the MAG-9000. But the sweetest thing is that you can adjust its angle from 25 to 45 degrees. Therefore, you can use this machine to sharpen curved mulching blades or conventional flat mower blades.

Sharpening a mulching blade is much more challenging than a flat one since it has curved or long cutting edges. This blade sharpener comes with a rounded worktable specializing in mulching blades, along with the standard flat worktable for flat blades.

First appeared on the market in 1999, this top-rated sharpener was awarded 3 US patents for its excellent design in sharpening curved blades like mulching blades.

Pros Cons
  • Adjustable angle (25 to 45 degrees)
  • Two worktable options – a flat worktable for flat blades and a rounded worktable for mulching blades
  • 1 HP Baldor motor
  • 2 grinding wheels
  • One-direction motor, have to stand on the opposite side to sharpen left-handed blades

6. Smith’s 50603 Lawn Mower Blade Sharpener – A Good Handheld Sharpener For Emergency Uses

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This hand-held Smith’s sharpener is a notable affordable option for refreshing your blunt blades without breaking your bank account. You can carry this compact machine on your worksite for quick blade sharpening in areas with no electrical power.

This machine from the Smiths is simple but efficient. Its grinding wheel is made of carbide, a combination of carbon and metal. This construction material is more durable than expensive stone grinding wheels. You can give your old blades a smooth and sharp edge in a few minutes.

Because this blade sharpener is designed for emergency usages, it isn’t recommended for blades that are too old or too blunt.

Pros Cons
  • Carbide spinning wheel for extra durability
  • Affordable
  • Compact design for easy transportation
  • Large finger guard
  • Can’t be used for blades that are too blunt

7. Work Sharp Mk.2 Knife & Tool Sharpener – A Good Electric Handheld Blade Sharpener

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Work Sharp MK is another portable blade sharpener that you should consider getting for your property. This sharpening tool gives you the freedom to sharpen a wide diversity of blades with speed, ease, and consistency.

This sharpener uses electric power for operation, so it can spin faster than above Smith’s item. Depending on the work’s requirement, you can adjust the operating speed, thanks to its two-speed motor.

The low-speed option is for precisely sharpening a knife, while the high-speed one is for heavy-duty tasks, like sharpening lawnmower blades, axes, and other lawns and garden tools with a blade.

The sharpening guide is another strong plus of this handy tool that I bet all garden owners will like. Even if you haven’t used a blade sharpener before, you can follow this guide to get the proper edge angle for your knives and blades. For example, you can instantly switch from a 25-degree outdoor knife to a 20-degree kitchen knife in one guide.

Pros Cons
  • Two-speed motor
  • Sharpening guide
  • For light-duty purposes only

My Top Pick

A sharp, well-maintained lawnmower blade is vital to keep your lawn or garden in good appearance and health. A high-quality blade sharpener can help you sharpen your blades and knives without wasting money and time on professional services.

Among the 7 above items, All American 5005 is the best lawn mower blade sharpener that I have used for 4 years. This sharpener provides all necessary criteria for at home.

Aside from the above sharpener types, another sharpening option is called drill bit lawn mower blade sharpener. This lawnmower sharpener is for drill machines to sharpen blades.

If you have a power drill, you can check this CZS. But I’m not interested in this hand drilling toolset because it’s relatively hard to use. You have to be careful not to chew up your blades. Likewise, this drill sharpener isn’t durable than any of the 7 above items.

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