How To Tell If You Need To Sharpen Your Mower Blade
Clean cuts with a sharp mower promote good lawn health. A properly mowed lawn helps prevent lawn disease from getting a foothold. The cut grass also returns nutrients to your lawn, so it grows even stronger.
Over time, lawn mower blades get dulled by usage. Regularly inspect the mower blades after mowing. When theyre looking worn, you’ll need to remove the blade from the lawn mower and hone the edges.
In general, sharpen twice per season or after 25 hours of use to keep your blades in good shape. Also, sharpen the blades after hitting rocks. Stone can easily dent or nick the blades.
The lawn itself can also hint when you need to sharpen your mower blades. If its not recovering well after mowing, thats a clue.
Look for these signs that you may need to sharpen the mower blades:
- Dents or nicks in the mower blades
- Uneven grass height after cutting
- Grass blades look torn instead of sliced
- Brown, frayed grass edges
Guide Material And Durability:
These sharpeners have a guide used to control the angle of sharpening, which confirms the blade to stay at the correct angle without shifting. Mostly, these guides are constructed with plastic material. If it is made of low-quality plastic, then it might overheat, melt, and generate smoke.
Also, applying too much force while sharpening will melt this plastic guide. So, this plastic used to build a guide should be strong and durable that wont easily break or melt. Moreover, you have to check the online reviews and ratings before buying a product.
Some guides have a problem with mulching blades. If having a mulching blade, then ensure to check if the dull lawnmower blade works in your selected guide.
How To Tell If Your Mower Blade Needs Replacing
You can only sharpen your lawn mower blades one too many times before they need replacing. But how can you tell whether the blades need sharpening or replacing? You will use your lawn mower for years before the blades are worn enough to warrant replacing.
Consult a professional to find out whether or not you should have your blades replaced with new ones. Some of the tell-tale signs indicating you need a blade replacement on your mower include
- Your lawn mower is several years old
- The blades still feel dull after sharpening
- The lawn mower cuts grass unevenly even after sharpening
- The blade is bent or damaged
- You see torn grass on your lawn right after mowing
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Benefits Of Owning A Lawn Mower Blade Sharpener
Anyone with a lawn mower needs a blade sharpener. Imagine cooking with a dull knife thats just dangerous and irritating. Its the same with your lawn mower. If it cant properly slice through the grass, things get messy quickly. A blunt edge will damage the grass, but not cut it. This results in clumps of grass from the released moisture. Not only do you have to clean the mower more frequently, it also takes more fuel to get the job done. A lawn mower blade sharpener ensures that the job gets done right the first time, while saving you from having to replace the blades.
Plus, its not like there is a rule stating that you can only use a lawn mower blade sharpener on a lawn mower. Sharpeners are surprisingly versatile. From hunting knives to household appliances, the ability to evenly sharpen is valuable. A quality sharpener shores up the lifespan of your equipment by abrading the surface evenly. It also mitigates the risk of injury from a dull or broken edge. Easy to store and with an impressive amount of utility, there are tons of advantages to keeping these tools around.
My Top Tips To Increase Your Chances Of A Successful Sharpening
Finally, herere my top tips to help improve your chance of successfully sharpening your lawn mower blades based on my experiences over the years.
- Always use protective gloves and eyewear.
- Have a long fie of at least 12-inches
- Sharpen from the top side of the cutting edge
- Use your file/grinder in one direction.
- Know the correct angle to sharpen the blade.
- Use a metal flapping disc on your angle grinder.
- Avoid gimmicky sharpening tools.
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Secure The Blade In A Vise And Sharpen
Secure the blade in a vise with the sharp portion of the blade positioned accessibly towards you. Using a small angle grinder, sharpen the lawn mower blades using a smooth, steady motion along the length of the sharpened portion of the steel. You want to match the existing angle of the blade, not create your own angle. This ensures the blade continues to maintain its proper lift and functionality.
Remember, the goal of lawnmower blade sharpeningis to sharpen the blade, not recut a new edge from a block of flat steel. Work with the metal! Try to remove the same amount of metal from each side of the blade so you maintain the balance of the blade. See our section below on balancing the lawn mower blade before you finish.
The Best Lawn Mower Blade Sharpener
We all know that sharp blades make for a better lawn mowing experience.
The problem is that its not always convenient or easy to sharpen blades.
Thats why you need the best blade sharpener. Use the CSZ blade sharpener
This is because you want to make sure your blades are always up to par, even if you cant get them professionally sharpened.
Heres our round-up of the top 10 best blade sharpeners:
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Should The Blade Be Sharpened Or Replaced
Sometimes theres no need to sharpen your lawn mowers blade because youre actually due for a replacement. Lawn mower blades dont have a specific lifespan, but generally, they should be swapped out every 2 or 3 seasons. The best way to tell if this is the case for you is to take a look at your blade. If the blade is bent, has large nicks/dents, or is suffering some serious rust damage, you should probably buy a new one. Knowing when to replace lawn mower blades can save you a ton of time.
How Do I Know If My Lawn Mower Blade Needs To Be Sharpened
Dull blades tend to rip at grass, rather than cutting it cleanly, though the first sign will generally be that the mowing will look a little uneven. If you see these, give the blades a physical assessment to look for dents or nicks, and go ahead and sharpen them to see if this resolves the issue.
Note: If your mower appears to be pulling grass out by the roots, stop mowing immediately and sharpen and balance the blades, as this is a definite red flag and your lawn and mower can both be damaged during this time.
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Rotary Blade Sharpener Lawn Mower Garden Tool Sharpener
With a rotating blade sharpener, you can sharpen lawn mower blades easily.
This tool can work with both circular and straight blades of different sizes. Its also compatible with both power drills and manual tools.
The rotary blade sharpener is made from high-quality steel and has a holster for easy storage.
The kit includes one 50mm guide for the drill and a smaller 30mm guide for the manual tool. Its easy to use, affordable, and convenient to store away quickly when not in use.
How Do You Sharpen A Lawnmower Blade By Hand
If your lawnmower blades are dull, they can tear grass rather than cut it cleanly. A sharp blade not only cuts better, but also puts less strain on the motor. You can sharpen lawnmower blades by hand using a file or rotary tool. To sharpen lawnmower blades by hand: 1. Park the lawnmower on a level surface and disconnect the spark plug to prevent the engine from accidentally starting. 2. Raise the deck of the lawnmower so you have easy access to the blades. For push mowers, this usually means tilting the mower back on its hind wheels for riding mowers, youll need to raise or remove the entire deck. 3. Use a block of wood or your knee to keep the blade from rotating while you work.4. Inspect the blade for nicks or damage if its severely damaged, it will need to be replaced rather than sharpened. Otherwise, use a file or rotary tool fitted with a metal grinding bit to smooth out any nicks and restore a sharp edge to the blade. Work slowly and evenly until both sides of the blade are sharpened evenly.
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Knowing When It Is Time To Sharpen Your Mower Blades
Look at the cut your lawn mower blade makes and the blade edge. These two very simple methods will tell you if its time to sharpen your blade.
If the grass is not being cut cleanly, its likely the blade is not sharp. And if the mower blade feels dull or has dents, its not sharp either. It wont take you long to make this diagnosis.
So now that you have identified that your blade is dull, lets dig a little deeper into how to sharpen a mower blade and what the process is. There are a few ways you can do it.
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- Remove the spark plug
- Pull the spark plug wire from the spark plug to prevent the motor from accidentally starting. Tape or tie it back so it doesn’t flop back into contact with the plug.
- Pro Tip:We recommend always removing the spark plug when you’re working on the blade. If the piston happens to be at the top of the compression stroke, a little bump to the blade might force the piston over the hump and into the power stroke. If that happens, the blade will lurch around and could break your hand!
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Accusharp Garden Tool Lawn Mower Blade Sharpener
AccuSharp specializes in developing knife and blade sharpeners to provide the sharpest edge for your tools. Whether your sharpening needs are in the kitchen, workshop, yard, hunting, or other outdoor sports, the brands sharpeners will help you maintain the best edge.
This is another versatile option that allows you to sharpen not just your lawn mower blade, but all single edged items in your toolshed. The blade is constructed from diamond-honed tungsten carbide which is one of the hardest known materials.
With its innovative performance, you can sharpen your lawn mower blade in approximately 10 seconds.
The sharpener features a reversible design that allows you to use both sides of the sharpener so that it lasts double its lifespan. Furthermore, it will not rust and you can clean it using a soap solution or in your dishwasher. With these features, the sharpener will last approximately for 5 to 10 years. The sharpener is equipped with an ergonomic handle that is suitable for both left and right-handed users. For your safety, the sharpener comes with a full length guard that protects your fingers during the sharpening process.
- Sharpens all single edged items
- Made from diamond-honed tungsten carbide
- Sharpens your lawn mower blade in ten seconds
- Both sides of the sharpener can be used
- Lasts for 5 to 10 years
- Ergonomic handle for right and left-handed users
- Full length guard for protection
Set Your Table Angle To Match The Existing Blade Angle
A bench grinder reverses the process of sharpening. Rather than move the grinder across the blade, you move the blade back and forth across the grinder wheel. Most bench grinders feature a table that tilts. Using this you can really get consistent results using this method. Set the angle of the table before you turn on the grinder and begin sharpening.
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Lawn Mower Blade Sharpening Safety Tips
Your lawn mower may be off when youre trying to sharpen the blades, but theres still a chance of injuring yourself if you dont take your safety seriously. Basic safety measures you should observe:
- Put on protective gear. This includes cut-resistant gloves, protective eyewear/goggles, and an apron or overalls.
- Consider working on a flat surface for improved stability and access to the blades
How To Sharpen The Lawn Mower Blade
Next, gather the tools to sharpen lawn mower blades. Mower blades have a 3- to 4-inch cutting edge on opposite sides of the blade. Check to see if the blade is dull or damaged.
- Clamp the mower blade into a vise or onto a worktable with the first cutting edge facing up.
- Examine the blade. Decide if it is better to sharpen it or replace it.
- If your blade has cracks, is missing large pieces, or is severely bent, replace it. You shouldnt sharpen a heavily damaged lawn mower blade.
- If your blade is just nicked, chipped, or dull, try sharpening it.
Lawnmower blade sharpening can be done several ways. You may already have some of the blade sharpening tools you need:
- Sharpening a lawn mower blade by hand uses metal files or abrasives.
- Sharpening a blade by machine uses a blade sharpener, bench grinder or angle grinder.
Only sharpen the blade so its as sharp as a butter knife. The edge shouldnt cut your finger. A razor-sharp blade dulls more quickly. Youd have to replace the blade more often after constant resharpening. A gently sharpened and shiny edge is the goal.
Safety Tip: Always wear gloves, long sleeves and eye protection when working with grinders and blades. Wear ear protection if youre using a machine method of sharpening.
Sharpen a Lawn Mower Blade by Hand:
Sharpen a Lawn Mower Blade with a Drill-Powered Blade Sharpener:
Sharpen a Lawn Mower Blade with an Angle Grinder:
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Lawn Mower Blade Sharpener Faqs
Q: How do I sharpen my lawn mower blade?
A: When sharpening your lawn mower blade or blades, follow these steps:
- Remove the blade from your mower.
- Remove the rust with a bush.
- Choose a firm sharpening surface.
- Use a grinder if the blade is damaged.
- Run your blade at an angle on the grinder.
- Balance the blade.
- Check if it sharp.
Of important, ensure that you use the right sharpening tool to sharpen your mower blades. Some blades should be sharpened by specific sharpeners while some can easily be sharpened by all sharpeners.
Q: Which is the right sharpener for sharpening my mower blade?A: The right sharpeners should last long and be affordable. It should also be suited for your specific blade.
Q: How long does a blade sharpener last?A: This will depend on how you take care of it and the frequency of use. Some sharpeners will last longer than others.
Q: Where can I get the right blade sharpener?A: You can find blade sharpeners in different places, including online store and your local store.
Q: How Often Should I Sharpen My Lawn Mower Blade?
A: It depends on different factors, but most lawn mower blades need to be sharpened every 20 to 24 hours. That means sharpening it once or twice per year.
However, if you are a commercial mower, then you should sharpen these blades once or twice a week.
Q: How Tight Should Mower Blades Be?
Q: Should I sharpen a new mower blade?
Q: How to use an angle grinder to sharpen lawn mower blade
Check The Blade Balance
Mowers run smoothest when the blade is balanced. However, sharpening sometimes removes more metal from one edge than another. This makes the blade unbalanced.
Its important to fix a blade that was imbalanced during sharpening. If it wobbles now, it will wobble on your mower too. An unbalanced blade may damage your mower. The vibrations alone are annoying, but the bearings or blade shaft might actually get destroyed.
Follow these steps to check the balance on your sharpened lawn mower blade:
- Support the blade under its center, like a scale. A screwdriver is an easy tool to use. Insert the screwdriver tip through the hole in the blade. The blade should balance on the tip or drop to balance on the handle.
- Hold the blade horizontal, then let go. It should remain level.
- If the blade drops in either direction, it means that the blade is unbalanced.
- The side that dipped down is heavier. Take a few strokes off that end to remove some metal, then retest.
For more precision in judging blade balance, purchase a blade balancer. Its a good addition to your mower maintenance tool kit. Its a cone-shaped tool that has a spindle for the blade.
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