Do Brand New Lawn Mower Blades Need To Be Sharpened?

do brand new lawn mower blades need to be sharpened

It’s always exciting when you get new “grown-up” toys. A new lawnmower, or new blades, is no exception. Unfortunately, there are still a few questions that the owner’s manual may not answer. We are going to answer a few of those questions for you, such as do new lawnmower blades need to be sharpened?

The short answer is no, new lawn mower blades do not need to be sharpened. They are sharpened during the production process. If there is a layer of paint on the blades, it will wear off after a few cuts and will be sharp underneath. Make sure to sharpen your blades for every new season, however.

Everyone loves a fresh cut lawn. Having curb appeal starts with having a nicely landscaped yard. We are going to go over a few do’s and don’ts when it comes to lawnmower blades. This way, it will help you understand the best way to care for your new mower or blades.

Does A Brand New Lawnmower Have Sharp Blades?

When you purchase a brand new lawnmower, the blades come already sharp. This can be hard to identify because there is usually a layer of paint over the sharp edge that looks dull. The paint will wear off after a few hours of mowing to the sharpened blade. However, blades do not have to be extremely sharp to cut grass.

The truth is, a slightly dull blade cuts just as well as a fully sharpened blade. It’s the power of the mower itself that does most of the work. You only need to worry about sharpening a blade if it is extra dull or has nicks and dings in it.

New Blades Come Sharpened As Well

If you already have your lawnmower and are buying just new blades, the blades will already be sharp. As with a new lawnmower, they may have a layer of paint on them. The paint will wear off after a few hours of use or a few cuts.

If they still do not look extra sharp, that is because the blades do not have to be razor-sharp to cut grass. The slightly dull blade, at the right angle, will cut the grass just fine. Not every pair of blades will have paint on them; either way, you do not have to worry about sharpening until they become extra dull or have imperfections.

Resharpening Lawnmower Blades

Lawnmower blades need to be resharpened after becoming incredibly dull or having knicks, dings, or imperfections. If the blade is only slightly worn, then they still have time left on them to use. Once the blade becomes very dull and has trouble cutting, then you need to resharpen the blades.

You may also have to balance the blades. There are a few things you should look out for to know if your mower is working correctly.

Common problems:

  • The blades are incredibly dull
  • There are imperfections in the blades
  • The mower is struggling to cut the grass
  • You blades are making noise

These problems could mean you need to resharpen your blades or that you need to balance your blades. You can do this on your own or bring your blades into a professional to have a specialist sharpen them for a low cost.

How Often Should Blades Be Resharpened?

This question is best answered by the performance of your lawnmower. If the blades appear to be slightly dull, but still cut the grass just fine, then they are still working correctly. If you have run into one of the common problems, then you may need to resharpen the blades.

Some people suggest resharpening them after about 20 hours of use or at the beginning of each new season. Some people will sharpen the blades after every 5-10 uses. However, the slightly dull blade does just as good of a job. When your blade gets exceptionally dull, it is time to resharpen.

When Do Lawnmower Blades Need To Be Replaced?

There are a few reasons that you may need to replace your lawnmower blades. It depends on how large your yard is, how many rocks there are, and how tall you let the grass get. Typically they should last at least 3-4 seasons before needing to be replaced.

Signs you need to replace them:

  • They are not cutting the grass as well
  • If they are bent or making wobbling noises
  • They have been resharpened too many times
  • Your engine is having to work harder

Any of these signs could mean you need to replace the blades. If you are hearing a wobbling noise, it could also mean that you need to balance your blades.

Balancing Your Lawnmower Blades

Sometimes lawnmower blades need to be rebalanced. There are several indications that your blades need to be balanced, such as:

  • You hear a wobbling noise
  • The lawnmower feels like it is moving unevenly
  • You’re cutting one side of the grass more than the other
  • One side of the blades tend to dig or hit the ground

One problem is, you accidentally sharpen one side of the blade, more than the other. This can cause the blades to become unbalanced. But, some new blades may come unbalance. You will know they are unbalanced if your mower vibrates when you first use it.

Balancing your blades can be done with easy to obtain tools and equipment. When you resharpen your blades, it is a best practice to also balance them. If you do not have the right tools for balancing, consider renting them or having a lawnmower repairman do the job for you.

Tips For Sharpening Lawnmower Blades

We have come across many of the problems related to an extra dull set of blades. Here are a few tips for sharpening.

  • Do not get them razor sharp. They are actually supposed to be slightly dull. Sharp blades could cut you while you’re installing them.
  • Always wear protective eye gear. Safety should come first when you are sharpening your blades. Wear safety glasses.
  • Make sure that you have a stable work table. You do not want the mower falling off of your workspace as you are working on it.
  • It is best practice to always balance your blades. If you are putting on new sharp blades, or sharpening them and putting them back on, balance them as well.

Remember that safety is always a concern. Have the right tools, and a safe work area, when working on equipment. If you do not have the right tools or work area, consider having someone sharpen them for you. Your local lawnmower repairman will most likely do the best job of sharpening, balancing, and making sure that your equipment is in tip-top shape.

Can You Resharpen Blades While They Are Still On The Mower?

This depends on the model of lawnmower that you own. Usually, you can resharpen them while still on the mower; however, we do not suggest this. Research your specific mower if you have any doubts.

You mustn’t resharpen blades on the machine if they appear to be bent or distorted. We suggest removing the blades from the lawnmower. Even if you can do it on the device, it’s always best to remove them, sharpen them, and then balance them.

Related Questions

Why is a slightly dull blade fine for cutting?

A blade that is too sharp does not cut grass as well as a slightly dull blade. For example, a weed eater has a plastic string yet still cuts through the grass and more enormous weeds like a champ. Sometimes too much of what seems to be a ‘good thing’ can cause even more issues.

Should the blade have an angled edge?

Most lawnmower blades do have angled edges. When you are resharpening the blades, make sure that you stay true to the curved edges on the blades when you purchased them.

Can I hire a professional to sharpen my lawnmower blades?

You can hire a professional to sharpen your blades if you are uncomfortable doing this yourself or if you don’t have the tools to do it. However, if you invest in a good blade sharpener, you’ll save money in the long run by sharpening the blades yourself.

Our Takeaway

When you buy a lawnmower or a new set of mower blades, it can appear that they aren’t very sharp, which causes you to wonder if you maybe need to sharpen the blades. You don’t need to! Your blades come with a coat of paint that will eventually break off. However, you can use paint thinner to remove it quicker so that your blades will function at their optimal level.

One crucial point to keep in mind is that your blades don’t need to be too sharp, as this will not increase their efficiency in cutting your grass. As a matter of fact, making your mower blades too sharp can cause your blades not to work as well as they should. Pay attention to how well your mower is cutting your grass before you decide to sharpen your blades.

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