How to Sharpen a Chisel Using a Grinder
Chisels are used in many different types of projects. Chisels allow users to make precise cuts that normal blades can't reach, allowing craftsmen to fit pieces into place with keen precision. Chisels also allow artisans to make thin cuts into their projects, giving them the ability to craft intricate designs. No matter what chisels are used for, they eventually dull through wear and tear, but a dulling chisel doesn't mean you have to buy new tools.
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Instructions
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Put on your safety gloves. Place the cutting edge of your chisel flat against the grinder. Set a glass of water somewhere within reach next to your grinder.
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Allow the grinder to grind against the chisel for a few seconds before putting it in the glass of water. If you do not place the chisel in the grinder every few seconds to let it cool, you chance cracking the chisel and permanently ruining the blade. (See reference one)
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Grind the cutting edge of your chisel like you did before as many times as it takes to get the blade to the desired sharpness. Do not forget to place the chisel in the glass of water every few seconds.
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4
Spray honing oil on your sharpening stone, so that you have a fair layer of oil. Drag the cutting edge of your freshly sharpened chisel back and forth across the sharpening stone. This will give the chisel the natural sharpened look and a cleaner cutting edge.
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Spray more of the oil onto the sharpening stone. Hold the back of the chisel against the stone and slide it back and forth across the sharpening stone. This will hone the rest of the blade, giving it the same professional look as the cutting edge.
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Tips & Warnings
Using a 60 or 80 grit white or pink aluminum-oxide wheel will allow you to grind your chisel and conduct less frictional heat then most other wheels. Even when using this type of wheel you will still need to cool your chisel to stop it from cracking, but you will be able to leave it on the grinder slightly longer then with other wheels.
Most chisels have a cutting edge that is angled around 25 to 30 degrees. Knowing what kind of work you are going to be using the chisel for will help you determine how much of an angle you should give the blade.
