How To Sharpen A Circular Saw Blade

How to sharpen a circular saw blade? When the saw blade of circular shape gets dull, not only will it produce a sharp finish, but the saw’s engine to work harder, which may result in it burning out sooner. Because you’ll be able to get cleaner cuts and require less frequent replacement of your saw and blades, sharpening them will save you money in the long run.

You may sharpen steel-toothed circular saw blades yourself with a file. Tipped Carbide blades must be sent to a sharpening service for mainly two reasons: first, because carbide is so hard that you need a diamond wheel sharpener for it, and second, because sharpening blades is so difficult that you can easily break the blade.

Blades made up of Carbide cut not just with the tips of their teeth, as do steel blades, but also with the sides. If you’re not careful, you could round off the edges of your carbide blades during sharpening. A saw blade sharpening service will return your saw blades to like-new quality for about 25 to 50 cents for each tooth. You should inquire about other sorts of blades since some can’t be re-sharpened and others are so cheap that it may not be worthwhile to have them sharpened. But don’t get rid of them immediately; save them for demolition work or wood processing if there are any nails present.

Step By Step Guide To Sharpen Circular Saw Blade

If you clean your circular saw with a wire brush, be sure to switch it off before you begin. A spindle lock, which allows you to change the blade swiftly, is often used on handheld and plunge saws.

Tools that are used to sharpen circular saw blades:

There are special grinding wheels for sharpening circular saw blades. These are generally associated with significant acquisition fees and aren’t typically worthwhile for the do-it-yourselfer.

You may also use a hand-held grinder to sharpen circular saw blades. With only a few tools, you can do it yourself.

  • a flat file
  • a ring spanner
  • two screw clamps
  • a triangular file
  • a set of pliers

However, when using a circular saw blade that has not been hardened in advance, only the manual sharpening of the saw blade will function. 

turned-on circular saw

A file is used to shape the hard edge of the blade. A file can be used with a saw, but it cannot be shaped because blades that have been given with hard metal are just as hard as those processed with them and can’t be molded. A specific sharpening device is required for saw blades with carbide tips, such as one that includes a professional grinding service.

In just a few minutes, it is feasible to sharpen circular saw blades:

Step 1: Remove The Saw Blade

The circular saw must first be disassembled. To remove the blade, loosen the knot using clockwise turns using the safety spanner and remove it from the body of the circular saw.

Step 2: Fix The Saw Blade

The workbench is equipped with a saw blade for sharpening. The two screw clamps are used to attach the saw blade to the workbench. When sharpening, make sure you tightly clamp the blade so that it vibrates as little as possible and there are no unpleasant vibrations.

Step 3: Make A Mark

Make a mark on the side of the blade with felt so you can tell when you’ve sharpened all around the circular blade. Then, using your file, carefully move it around 20 degrees and file 4 times up and down along the bevel. 

The goal of this process is to sharpen both sides of the circular saw blade at the same time. Repeat steps 2 and 3 for the other side of the circular saw blade, keeping it as level as possible during sharpening and filing.

Step 4: The Circular Saw Teeth Have Been Trimmed

Prior to sharpening, the saw blade teeth are shortened. This procedure is required as the original liner rows of teeth become unparallel over time and usage. The tooth tips are flattened and filed to the same level with a flat file. Horizontal file strokes are used to achieve this result, which is achieved by repeating filing strokes across rows of teeth.

Step 5: Set Teeth

To ensure that the saw may operate properly after steaming and not get trapped in the workpiece, the teeth must be set, which is to say they must be bent together. This ensures a saw cut that is wider than the actual saw blade and prevents material from being stuck.

It’s best to utilize pliers for this. This allows you to form a uniform set that is directed equally to the left and right, ensuring that the saw blade will operate properly in both directions. Avoid bending a tooth originally placed on the left or right, as doing so may cause it to break and render the saw blade unusable.

Step 6: Sharpening Circular Saw Blade

The first step in the post-cementation process is to sharpen the teeth. The triangular file is used for this purpose. A uniformly pointed form should be achieved with three to four filing strokes over each tooth, resulting in a similarly pointed shape across all teeth. 

Always remove only as much material as is absolutely necessary, or else the other teeth will have to be adjusted later. It’s better to sharpen the left-hand of the tooth row fast, then turn the blade, and finally sharpen the right-hand tooth row.

Step 7: Install The Freshly Sharpened Circular Saw Blade

The saw blade can be reinserted in the circular saw after sharpening. To avoid imbalances that cause the blade to vibrate, pay attention to a good, tight fit. The nuts are tightened using the ring spanner by turning them to the left.

Step 8: Test The Resharpened Circular Saw Blade

After sharpening all of the teeth, it’s time to test the cutting performance. Attach the equipment to the tool and start it up. Saw a trial wooden block using this method. A light cut, smooth operation, and quiet operation are indicators that the sharpening was done well. If there is a loud buzz with blunt material being sliced, it’s possible that your saw blade isn’t at its proper height.

To line up all segments, raise the marker to complete a full spin and cutting edge in the opposite direction from the rotation. Examine the surface for marks; they should remain on each blade tooth to assist with the height comparison of all segments. Locate and reduce the highest-height teeth using a file carefully.

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