How to Sharpen A Knife With A Belt Sander?

How to Sharpen A Knife With A Belt Sander

Sharpening knives can be quite dangerous and sometimes people hurt themselves, especially when sharpening them at home. Now we have different tools to sharpen knives but did you know that you can sharpen them with a belt sander? There are different ways of sharpening knives, some prefer stones and some use other tools.

This conservative process also requires your strength while you are rubbing nook on the stone but with a belt-sander, you are not required any extra strength and time you just need to follow the guide. Belt sanders are used for various purposes, one of which is to sharpen blades, knives, or razors. Belt sanders support different belts for different goals.

Here you will know how you can easily do this little dangerous task without any discomfort and within 10 minutes. First of all, you should know that it is a little hard process if you have no guidance about it or have any previous experience you can hurt yourself. Now, if you are looking for a guide on “How to Sharpen a Knife with a Belt Sander”, you are at the right place.

How to Sharpen A Knife With A Belt Sander

Precautionary Measures

Before we start the process of sharpening a knife with a belt sander, it is important to consider safety first. Below are some necessary precautionary measures that you must keep in mind.

Precautionary Measures
  • Do not place your finger on the nook while you are sharpening the knife on the belt sander.
  • Do not check the sharpness of the knife with your finger or palm.
  • Do not apply extra force when you are sharpening the knife.
  • The speed of the belt sander should be 20 to 40, if you try to accelerate the process by accelerating speed you may break the knife.
  • Try to avoid dusty belts, if the belt seems dusty first clean it.
  • Wear safety glasses to save your eyes from any type of risk if the knife breaks.
  • Wear gloves to save your hands.
  • Wear a mask to avoid the smell and dust.

Step-by-Step Guide to Sharpening A Knife

There are simple 6 steps to complete this task. You need to follow each step properly and do not skip any of the steps below otherwise your task will be incomplete.

Step 1: Loading a belt

First, you simply need to load a grit belt onto your sander. After you have loaded the belt, make sure that the belt is not too tight or loose. If the belt is too tight it may break your blade apart and if it is loose so you cannot sharpen the blade.

Loading a belt

You need to choose the direction of your belt sander. If your sander is horizontal then it is best, but if it is vertical then the belt spins towards you. It is better to stand at a safe distance then.

Step 2: Turning on the sander and speed of spinning

Now simply turn on the machine after loading the belt in the right direction and stand in the direction of the belt movement. There will be different speeds visible on the meter, you just need to keep the speed between 20 to 40.

Turning on the sander and speed of spinning

Maximum speed may damage the nook of the knife or break it, so keep the speed normal of the belt sander.

Step 3: Sharpening

Now that you have successfully completed the above two steps, the real deal is about to start. You should take your knife and gently glide the blade across the spinning belt. You have to apply the nook of the blade and a little tilt. When you are sharpening the blade you need to sharpen both sides, so stroke the blade and turn the sides. Keep in mind all the sides of the nook should be sharpened so turn the sides again and again.


Most experts and professionals of sharpening knives are very careful about their hands and apply a gentle amount of strength. You need to be careful because the belt may hurt your hands; one hand is on the hilt and the other is on the tip of the blade.

So you need to control your hands, if you mismanage or lose the balance of your blade or try to play with it, it may break and hurt your hands. After a few initial minutes, when your blade is across the sander you need to push it slightly. Do not push hard or apply extra force. Your hands should not touch the belt.

Step 4: Cooling the blade

After a couple of strokes, your knife’s blade may heat up. And if you keep sharpening it consistently it may damage. So you need to cool your knife’s blade from time to time while you are sharpening. This will help you to save your blade for a long time and allow you to have the best results.

Cooling the blade

If you are thinking of having some ice cubes while you are performing this task so you are wrong, just need a bowl of water. You need to dunk your knife after some strokes when you feel the blade is erupting some extra heat and let it cool down in the water.

Step 5: Honing the blade

Now that your blade has sharpened successfully without any damage, there is another important step left. After the blade has sharpened you can see a burr on the blade. You just need to remove the burr and your task will be completed. There are different ways to remove burrs. We are going for the easiest way.

Honing the blade

Now you need to load a leather belt as you installed the grit belt before. The leather belts are expensive so use the belt carefully. After installing the leather belt you have to do the same as before. Give some strokes to the blade and do not touch the nook, keep the knife in your control. After some strokes, you will be able to see a beautiful shine visible on the nook. Your blade is ready.

Step 6: Checking Blade

Your blade is ready to work so now you have to check it. Here you need to understand that newly sharpened blades are delicate because the edges are too weak now. You need to check it on the paper. Take a piece of paper and cut it with your knife.

Checking Blade

Do not use any metal or cloth until the knife can cut a piece of paper. After some trials, you can cut anything. Do not try to check it on your palm or finger or on plastic until the first paper trails are successfully passed.


The following are the tips that you must pay heed to when sharpening a knife;

  • Use both hands while sharpening the blade and control the blade in your hands.
  • Dunk your blade after a couple of strokes in cold water, it will enhance the quality of the blade as well as cool the blade.
  • Try to check the blade by cutting paper while sharpening to make sure you do not damage the blade by extra sharpness.
  • Do not push the razor, just apply the blade across the spinning and let the belt do it.
  • Use a leather belt for honing, just apply the blade on the belt and it will hone automatically.
  • Use burr compound for desired results.
  • Avoid keeping the blade on the belt for long otherwise, you will face abrasion.


Why do you need to sharpen a knife?

The knife is used for cutting or for chopping something. After some amount of use the blade of knives wears out and we are unable to use the knife properly. So to slice anything whether meat or tomatoes we need to sharpen it over time. Secondly, it enhances the quality of the knife, with a worn-out blade you will be unable to cut anything and require extra force. A sharpened knife on the other hand does your task within seconds and saves your time as well as energy.

What grit sandpaper is best for sharpening knives?

You need 800 to 2000 grit sandpaper for your normal knives at least. The sandpapers of 200 to 400 are used for extra damaged and dull blades.

Can you sharpen a kitchen knife with sandpaper of a belt sander?

Yes, you can sharpen a kitchen knife with sandpaper of a belt sander. If you are troubled by the guide you can follow the above 6 steps on “How to Sharpen a Knife with a Belt sander”.


Sharpening a knife is not a big deal! When it comes to large knives, expensive knives, and precious knives you should not compromise in the matter of sharpening because most of the blades are broken while sharpening. There are different other ways to sharpen but the easiest and most convenient way is to sharpen it with the belt sander.

Belt sander does not require extra time and force. You can sharpen it within minutes and your blade will be new again. After reading the above guide you will be able to sharpen any blade, razor, or knife at home if you have a belt sander or at the workplace.

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