How to Sharpen Table Saw Blades

How to Sharpen Table Saw Blades

Table saw blade often gets blunt after it’s been used a few times and this does not mean they should be discarded or replaced. All you need to do is to sharpen the blade and it will be as good as new.

However, before sharpening your table blade saw, there is a need to be equipped with the right information. So in this article, we are going to discover all the ins and outs of How to Sharpen Table Saw Blade.

Reasons to Sharpen Your Table Saw Blade

Sharpening your table saw blade is important as it helps you achieve three things. They include:

  • Sharpening makes the blade last longer
  • It maintains the quality of cut
  • It generally improves the performance of the saw

When blunt blades are used to cut materials such as delicate wood, it may burn through. Blunt blade makes it harder to use a saw and does not give clean, precise cut.

Identifying a Blunt Saw Blade

To determine whether or not your table saw blade needs sharpening, you should be able to identify if the blade is blunt or not. If you need to put in more effort while cutting through any material than you usually would, it’s an indication that the saw blade is blunt and so needs to be sharpened.

It is important to sharpen the blade as soon as it starts showing signs of bluntness. If this is not done it can lead to irreparable damage and the need to replace the blade. Below are some common symptoms which indicate a blade is blunt.

They include:

  • There is a resistance when cutting through materials
  • Load on the motor increases
  • The edge of the material is not smooth (this may come in the form of visible chips or splinters)
  • The blades make a sharp, shrill noise when it touches the surface of the material

Things Needed To Sharpen a Dull Blade

Before proceeding to sharpen a dull blade, you will need a diamond saw blade. This is to be mounted on your table saw as it will be used to sharpen the dull blade. If you do not have a diamond blade, then you should consider purchasing an alternative product.

Safety Precautions

To avoid injuries and accidents, there is a need to take precautionary measures. The steps to take with regards to safety precautions include:

  • Electrical Switch: Switch off the electric socket and unplug the table saw
  • Safety Goggles: By wearing safety goggles, you prevent small particles, splints, and chips from hurting your eyes
  • Safety Gloves: Safety gloves should be worn as it prevents bruises and cuts
  • Safety Earmuffs or Earplugs: Also, the use of safety earmuffs or earplugs will reduce the noise produced as you sharpen the blade
  • Dust mask Respirator: A dust mask respirator is also needed as this prevents the inhalation of metal particles

How to Sharpen Table Saw Blade

To sharpen your saw blade, take the following steps:

Detach the Blade from the Motor

Do not attempt to sharpen your saw blade while it’s still attached to the motor. This is because you will not be able to restrict the blade’s movement or secure the blade if it’s in the saw. Regardless of the dullness of the blade, it’s still sharp enough to cause serious injury or harm to you, therefore it is important to remove it.

To do this, search for the blade-release switch and then detach the blade. If your saw does not have a blade release switch, then you will have to loosen the arbor nut using a wench.

Mount and Secure the Diamond Blade

Now that you have successfully removed the blade from the motor, you will need to replace the saw blade with a diamond blade. This diamond blade is the instrument needed to sharpen the dull saw blade.

If your saw has a blade switch, use it to insert and secure the diamond blade. If a switch is not available, you can make use of a nut to tighten the diamond blade. However, when using a nut, ensure it’s neither too tight nor too loose as a tight nut can bend the blade while a loose blade, on the other hand, will not secure the blade properly in place.

Align the Blade’s Teeth

The next thing to do would be to align the blade’s teeth. However, before you proceed with it, ensure you mark each tooth of the blade using a marker or a tape, this ensures you don’t miss any tooth while sharpening the blade.

Once the teeth are all aligned and pointing in the same direction, then you can sharpen the blade all in one pass. On the other hand, if the teeth are pointing in both directions, then you will need to sharpen the blade one pass at a time.

Filling the Blade’s Teeth

Once the teeth have been aligned, the next thing to do would be to plug the saw back into place and put it on the switch. You will notice that the diamond blade starts to rotate. At this point, bring the marked teeth of the saw blade close to those of the diamond blade and once close, touch the blade of the saw to that of the diamond blade.

While doing this, it’s necessary to ensure that the inner part of the blade is in close contact with the diamond blade. This is because it’s the part with the carbide layering that is responsible for the blade’s bluntness.

Once done, move on to the next tooth and repeat the same process all over again, continue with all other until all the teeth have been sharpened.

Remove the Diamond Blade

Once you are done sharpening the blade’s entire tooth and you are satisfied with their sharpness and how clean they are, you will need to remove the diamond blade from the table saw. Once you have taken the blade out of the saw, ensure you clean it up properly before setting it aside. This will remove the little metal particles off the blade and also remove all carbide dust to ensure it does not rust.

Installation of Blade

Now it’s time to fix the blade back and also check if the blade was well sharpened. Once the job has been done, plug the saw into an electric socket and turn it on.

To test if it was well sharpened, cut through some material. It should cut through in a smooth and effortless manner with little or no resistance. Check the edges of the cut material to ensure they are regular and have a smooth surface. If this is so, it means the blade was well sharpened and if not, then you may need to begin the process again.

Things to Take Note of While Sharpening a Table Saw Blade

It is essential to keep in mind that the sharpening method explained in this article will not work for all blade types. If the table saw is old or there is a curve of the blade rather than a straight edge, it will be difficult to use the method outlined above.

Also, it is important to ensure that the blade tooth has enough carbide to enable it to be sharpened properly. If it has been sharpened too often or there’s not enough carbide on the blade tooth, you will not be able to work with the table saw and may have to replace it. These factors when considered will prevent you from wasting your energy and time using the wrong method.

Maintaining a Table Saw Blade

Various types of blade saws exist on the market, but you can tell one from another by their shape and also the level of grind. However, regardless of the blade you select, if it is not properly and regularly maintained and cared for, then it will not last as long as it should and will need to be replaced.

One of the ways a saw blade can be maintained is to ensure the blade is well cleaned and sharpened. It is important to clean the edges of the blade in order to be sure there is no sign of rusting and that there is no carbide layering present at the cervices and edges. This may look insignificant, but if not taken seriously may affect the quality and usability of the blade.


Using a blade of poor quality is not advisable as it will cause irreparable damage to your saw and the material you are working with. A low-quality blade can also wear out your motor and put an unnecessary strain on you. Therefore, if you do not want any of these to happen, it is best to learn How to Sharpen Table Saw Blade as with the knowledge gained in this article you can keep your blade sharpened easily.

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