Are Lawn Mower Blades Reverse Thread? (Explained)

Replacing the blades on your lawn mower is a common task, but it can be confusing if you’re not sure if the blades have a reverse thread. In our blog post on Are Lawn Mower Blades Reverse Thread? Explained, we clarify this issue and provide helpful tips on how to remove and replace lawn mower blades.

If you’re wondering whether lawn mower solenoids are universal, check out our article on Are Lawn Mower Solenoids Universal? Explained for a clear answer.

Are Mower Blades Reverse Threaded?
Key Takeaways
Lawn mower blades can be either standard thread or reverse thread.
It’s important to know whether your lawn mower blade is reverse threaded before attempting to remove it.
You can usually find out whether your blade is reverse threaded by checking the stamp or label on the blade.
Removing a reverse threaded lawn mower blade requires turning it counterclockwise instead of clockwise.
Sharpening a reverse threaded blade is the same as sharpening a standard blade.

Are Lawn Mower Blades Reverse Thread

Lawn mower blades are reverse threaded, meaning that when you look at them from the top down, they appear to be going in a counter-clockwise direction when viewed from above. This is because most lawnmowers are designed to cut grass going forward and not backward.

When you consider how this affects blade sharpening, it makes sense that these blades would need to be reversed when being sharpened so that they can properly cut grass moving toward them instead of away from them.

When it comes to lawn mower maintenance, it’s important to understand whether or not the blades are universal. Our article on are lawn mower blades universal can help you navigate this common question and ensure your lawn mower is running smoothly.

Do The Blades Work In A Clockwise Or Counter-Clockwise Direction?

The direction of the blade will depend on the model of your lawn mower. If you have an older model, the blades might rotate in a counter-clockwise direction. Newer models usually rotate clockwise.

In any case, it’s important to sharpen your blades in the same direction as they are rotating so that they don’t get caught up or damaged while you’re sharpening them. It may seem counterintuitive at first (since most people sharpen things backward) but trust us: sharpening forward ensures that everything goes smoothly!

Common Types of Lawn Mower Blades

Types of Lawn Mower BladesDescription
Standard bladesThe most common type of lawn mower blade, with a regular threading that tightens clockwise.
High-lift bladesThese blades are designed to create more airflow and suction, making them ideal for bagging grass clippings.
Mulching bladesMulching blades are designed to chop grass clippings into small pieces, which can then be left on the lawn as fertilizer.
Gator bladesThese blades feature a unique design with serrated edges that help them cut through tough grass and debris.
Low-lift bladesThese blades are similar to high-lift blades, but with a smaller angle, making them better for dispersing grass clippings evenly on the lawn.

Is The Blade On A Lawn Mower Supposed To Be Sharp Or Dull?

The blades on a lawn mower are supposed to be sharp in order for them to efficiently cut grass. A dull blade will cause the mower not only to tear up the ground beneath it, but also make it difficult for your machine to even start cutting grass at all. 

If you find yourself struggling with starting your mower due to a dull blade or if it seems like it’s hard for the machine itself to push through dirt and grass, then this is likely why: Your blades need regular sharpening!

How Do You Sharpen A Lawn Mower Blade?

To sharpen a lawn mower blade, you need to use either a sharpening stone or a bench grinder. A file can also be used but it can take longer than other methods and may damage the metal if not done properly.

Some models come with an electric motor that spins the blade while you hold it against the stone or grinder. This is easier than holding onto the blade yourself, especially if it’s heavy or awkward to hold with one hand while turning with the other one. 

But this option isn’t always available because some models don’t have an electric motor installed in them (or perhaps they do but no instructions on how to find/use such features).

Are Metal Blades Better Than Plastic Ones?

Metal blades are generally more durable than plastic ones and can be used for a longer period of time. However, they cost more money upfront and require regular sharpening throughout the year.

Plastic blades are less expensive but can easily warp or break if they’re not maintained properly—if you don’t sharpen them regularly, they will dull quickly because they’re made from softer materials (such as polyethylene).

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Why Is There A Hole In The Middle Of My Blade?

The hole in the middle of the blade is there so that it can spin. It’s an open circle that allows air to pass through while you’re cutting grass, which helps keep your blades cooler and keeps them from catching on anything if they get stuck on something (like a rock or twig).

How Do You Replace The Blades On A Lawn Mower?

To replace your blades, follow these steps:

Remove the old blades. Loosen the nut and bolt holding each blade in place using a socket wrench. Lift off each blade, being careful not to cut yourself on sharp edges or parts of the mower that may be sticking out from under them.

Clean the deck of your mower. Using soap and water, scrub any dirt off of surfaces where new blades will be installed—this includes all four sides of both wheels (front and back) as well as underneath them at their lowest point where they meet with what’s left over from previous cuts; also clean around where you’ll reinstall those bolts later on (they should still have some greasy residue left over from when you took those parts off). 

You can use steel wool if necessary for tough stains but don’t go overboard—over-scrubbing could damage more than just dirt!

What’s The Best Way To Store Your Mower When It’s Not Being Used?

The first thing you should do is store your mower in a dry place. This will help prevent rust and corrosion from forming on the blades, which can weaken them over time and make them more likely to break off. The second thing is to keep children and pets away from it. 

They may be curious about what’s under the hood of the lawnmower and could even get hurt if they try to climb on top or play around with it when you’re not looking. Make sure that anyone who uses your lawnmower knows not to touch anything inside until after they’ve turned off their equipment completely—and even then, only touch what needs touching!

Finally, remember that all machines require regular maintenance as part of their operation (whether we like admitting this or not!). So before storing away for wintertime use, check things like oil levels (just add some more if needed) as well as spark plugs for damage due early wear through many years’ worth

Will Using A Power Washer On Your Grass Harm Your Blades, If They Aren’t Made For It?

Your lawn mower blades are made to withstand all sorts of weather conditions, including rain and snow. However, if you use a power washer on them (or any other high-pressure water source), they could get damaged by the force of the water that’s coming out at them.

If your blades are made for power washing then there shouldn’t be any problem—but if yours aren’t, then it’s best not to risk damaging them by doing this!

Lawn mower bags are an essential accessory for keeping your lawn neat and tidy. If you’re wondering whether they’re universal, check out our article on are lawn mower bags universal to learn more and find the right bag for your mower.

Can I Use My Electric Lawn Mower In Wintertime Without Damaging It?

No, you can’t. Electric mowers are not designed for winter use. In fact, if you try to use an electric lawnmower in cold weather or even store it outside during cold months without properly preparing it beforehand, there’s a good chance that the motor will be damaged beyond repair by freezing temperatures and ice buildup over time.

When using an electric mower in summertime isn’t ideal either the motor will overheat after prolonged use under hot conditions but at least then the damage won’t be permanent since ice doesn’t form on its surface as often as with gas-powered models (which we’ll talk about next).

Can I Sharpen My Own Blades At Home Without Any Special Tools Or Skills?

You can buy an excellent quality electric or manual lawnmower blade sharpener for under $100 that will restore your blades to factory-new condition, giving you years of trouble-free mowing.

However, if you don’t have the right tools or know-how (or just want to save yourself the hassle), there’s no shame in taking them somewhere else for sharpening.

What Can Go Wrong With My Lawnmower’s Blade That Won’t Allow Me To Cut Grass Anymore?

Blades get dull. Dull blades can cause uneven cuts and slow down the mowing process.

Blades get damaged. If a blade gets bent during use, it won’t cut grass effectively anymore, even if it is sharpened. The easiest way to repair this problem is by replacing your blade entirely (more on that later).

Blades get stuck in grass or rocks or any other obstacle that could damage them or bend them out of shape while they try to cut through whatever they’re stuck on without slowing down your mower’s progress too much, which would make mowing take longer than expected. 

When this happens repeatedly over time, you’ll need new blades rather than just sharpening them again because they’ve been worn away from constant friction against hard objects like boulders or large stones during each pass over them and depending on how damaged these obstacles are as well!

Lawn mower solenoids play an important role in starting your mower, but not all solenoids are created equal. Learn more about are lawn mower solenoids universal and how to choose the right one for your mower.

How Often Should I Sharpen My Blade So It Stays Sharp And Efficient Throughout The Year?

How often to sharpen depends on the type of blade you have and how much grass you cut. The more frequently a blade gets used, the more quickly it will become dull and inefficient. If your lawn mower is used only occasionally or has not been sharpened in a long time, then it’s best to take it to an expert for sharpening.

This Is A Blog Post About Lawn Mowing Questions Answered

This is a blog post about lawn mowing questions answered. This article is a good resource for people who have questions about lawn mowing and its related disciplines, such as blade sharpening or storing your mower when it’s not in use.


There are a lot of different types of mower blades and they all work in different ways. Some operate clockwise while others go counterclockwise, but most are sharpened on both sides to ensure maximum efficiency when cutting grass. 

If you have an electric lawnmower, then it doesn’t matter whether your blade is dull or sharp because there aren’t any moving parts inside the motor housing; however, if it’s an old-fashioned gas engine machine with spinning wheels underneath them, then you’ll probably want to sharpen those blades often!

Choosing the right spark plug for your lawn mower can make a big difference in how well it runs. Learn more about are lawn mower spark plugs universal and how to choose the best spark plug for your mower to ensure optimal performance.

Further Reading

Here are some additional resources to learn more about lawn mower blades and maintenance:

Sawinery: Are Lawn Mower Blades Reverse Thread? – This article provides a comprehensive overview of lawn mower blades, including how to remove, sharpen, and replace them.

Garden Tool Expert: Are Lawn Mower Blades Reverse Threaded? – This article covers the basics of lawn mower blades, including how to tell if they’re reverse threaded and why it matters.

Lawn Mower Guru: Are Lawn Mower Blades Reverse Thread? – This article answers common questions about lawn mower blades, including how to remove and sharpen them, and whether or not they’re reverse threaded.


What does it mean when lawn mower blades are reverse thread?

Reverse threading means that the blade is threaded in the opposite direction of a typical screw or bolt. This means that instead of turning clockwise to tighten, you turn it counterclockwise.

Why are some lawn mower blades reverse thread?

Reverse threading is used to prevent the blade from accidentally unscrewing while the mower is in use. The rotation of the blade keeps the bolt tight instead of loosening it.

How do I know if my lawn mower blades are reverse thread?

Most lawn mower blades have a stamp or label indicating whether or not they’re reverse thread. You can also consult your mower’s user manual or look up the information online.

How do I remove a reverse threaded lawn mower blade?

To remove a reverse threaded blade, you’ll need to turn it counterclockwise instead of clockwise. You can use a socket wrench or blade removal tool to do this.

How do I sharpen a reverse threaded lawn mower blade?

Sharpening a reverse threaded blade is the same as sharpening a regular blade. You can use a sharpening stone, grinder, or file to remove nicks and burrs and restore a sharp edge.