How to Sharpen Scissors and Knives with a Dremel?

dremel sharpening chisel knife


Even the best pair of scissors or knives gets dull with use. That's why you need a good sharpening device on hand to keep the blades in good condition. The Dremel rotary tool is one of the types of power tools, with the right Dremel bit, you can easily sharpen scissors and knives.

Dremel sharpening accessories

What type of Dremel grinding wheel do you need to sharpen knives, scissors and shears? You need to use a Dremel bit designed for grinding and sharpening. They are either aluminum oxide stones or silicon carbide stonesdepending on the material to be sharpened.

grinding wheels for steel knives

To sharpen stainless steel knives and scissors, you can use an aluminum oxide stone such as the Dremel #932 or #952. These are general purpose sharpening stones for metals.

Ceramic knives

One of the most effective wheels for sharpening ceramic knives is the Dremel Silicon Carbide Sharpening Stone. This is model no. 84922, 4.8 mm, which is ideal for knives, scissors and tools made of materials such as ceramic tiles, glass, porcelain, etc.

If you can't find that specific model, use any Dremel bit designed for metal sharpening. Be sure to shop around to find the best one, which is a bit that can sharpen all the models you have without having to change the Dremel bit.

Remember, a good sharpening bit can last a long time if used properly.

How to sharpen a knife with a Dremel

Sharpening knives and scissors with a Dremel uses similar techniques. If you are sharpening a knife, you are ready to begin. But if you're sharpening scissors, you'll need to separate them into two parts and sharpen them separately, as explained in the next section.

dremel sharpener chisel knife

How to sharpen a knife with Dremel?

  • Step 1: Place the knife in a vise with the sharp end facing out. Make sure the slanted side is facing up.
  • Step Two: Put the right bit in the Dremel and make sure it's secure. Now turn on the Dremel and you are ready to sharpen.
  • Step Three: Hold the Dremel at a 10 degree angle against the upward side of the knife blade. You can begin to sharpen the blade until it is razor sharp.
  • Step Four: Once the first side of the knife is sharpened, you need to sharpen the other side of the blade. Hold it at a 10-degree angle and move the Dremel back and forth until it is sharp. If the knife you are sharpening also has a flat side, sharpen only the slanted side and leave the flat side alone.

You must be careful when sharpening and do not apply too much pressure. Instead, focus on sharpening one smooth stroke at a time until it becomes sharp. Finally, polish it with a stone or polishing pad to smooth the edges and remove burrs.

For some knives, you may need to sharpen them at a greater angle than for others. This depends on the type of knife you are sharpening. If you regularly maintain the edge of your knife, you can follow the existing angle. However, it is best to check with the manufacturer for the proper sharpening angle.

How to sharpen scissors with a Dremel

Sharpening scissors, metal shears, garden shears, etc. requires an extra step. You must disassemble the blades to facilitate sharpening. Remember, you are really only sharpening one side of the scissor blade, the other remains straight, so be sure to identify the correct side to sharpen.

The following video from Dremel explains the step-by-step process of sharpening shears with a Dremel rotary tool.

YouTube video

Step 1: Dismantle the scissors or shears

Removing the blades allows you to sharpen the scissors easily. Unscrew the screw that holds the pair of blades.

If you find disassembly difficult, don't worry. You can still sharpen without separating the blades, but it will be slightly less effective.

Step 2: Clean the blades

Use a wire brush or polishing bit to remove any rust or dirt. If you find protrusions or an uneven surface on the inside of the blade (flat side), remove them with a stone.

Step 3: Use a vice

You can either clamp the blade and move the Dremel over it, or clamp the Dremel tool to the vise. Ideally, you should use the Multi-screw attachment to secure the Dremel rotary tool in place.

Step 4: Attach the end cap

This step is self-explanatory. Attach the grinding wheel and start your Dremel tool. For small shears, use Dremel bit #932 and for large garden shears, use stone #8193.

Step 5: Wear safety equipment

Be sure to wear safety glasses and a mask because the grinding process creates a fine grinding dust.

Step 6: Start sharpening

Sharpen only the angled edge of the blade. Align the angle of the blade to close the gap between the blade and the whetstone. Move the blade against the rotating wheel from the tip to the hinge. Move the scissor blade in a continuous, long, even motion to avoid burning any area.

If you attach the blade to the vise, move the rotary tool against the edge to sharpen it. Once the scissor blade is sharpened, you can remove it from the vise and replace it with the other scissor blade.

how to dremel sharpen scissors knife

Step 7: Deburring

If the blades were too dull, you may need to remove more material. This will create burrs on the sharpened edges. You can use a polishing stone or a flap wheel such as Dremel #502 to remove these burrs.

Step 8: Assembly

Now that the blades of the scissors or shears are sharpened, it is time to reassemble them. For large shears, apply lubricating grease around the hinge area and reassemble the blades.

When the blades are open, there is a space between them and you can feel the play. When you close the blades, this gap disappears. But if you tighten the screws too much, it will be very difficult to close the blades. Adjust the clamping screws to obtain the optimum distance between the scissor blades.

Step 9: Cutting test

The final step is to test your shears or your newly sharpened garden shears.

dremel blade sharpening kit

Dremel Sharpening Kit

The Dremel A679-02 is an accessory kit that makes your sharpening jobs easier. If you are a professional offering gardening or tree trimming services, you will need to sharpen your cutting tools regularly.

Ce kit d’accessoires d’affûtage comprend un guide d’affûtage pour les lames de tondeuses à gazon, des guides d’affûtage pour les outils de jardinage, un guide d’affûtage pour les tronçonneuses, des entretoises, des pierres à affûter et une clé.

Mathieu

Mathieu

Experienced handyman, I had the pleasure to build myself my last 2 houses. But my real passion is to create, modify or give life to all the objects that decorate my home. That's why I'm sharing my experience with the intensive use of Dremel tools. They are indispensable to me and I use them every day 😀

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