Circular saw blades for cutting aluminium materials are very different from blades for cutting other materials. Aluminium cutting circular saw blades have a negative hook angle compared to positive hook angle on blades for cutting other materials.

The Aluminium blade has a negative hook angle, so the teeth do not grab into the aluminium and bend the aluminium that you are cutting. The aluminium blade is also thicker than other blades, and it has less tension which makes the saw stiffer and prevents the blade from flexing while cutting the aluminium.

Follow the steps listed below to safely cut through aluminium plates and sheets with maximum efficiency and accuracy.

Choosing The Right Circular Saw Blades For Cutting Aluminium

When comparing options for aluminium cutting circular blades, look at the tooth count of the blades. Thicker material requires fewer teeth while more teeth help deliver smooth cuts on thinner aluminium. If the aluminium is less than 1/16-inch thick, use a blade with more than 10 teeth per diameter inch. For example, several companies produce blades with 200 teeth specifically for cutting very thin aluminium.

When cutting material up to 1/8-inch thick, use a blade with 10 teeth per inch, such as a 10-inch x 100 tooth or 12-inch x 120 tooth blade. For material up to 1/4-inch thick, use eight teeth per inch. For thicker sheets of aluminium, use a blade with just six teeth per diameter inch.

Lubricate The Circular Saw Blade For Added Protection

The biggest risk of cutting aluminium with a circular saw is the blade grabbing the material. Use lubrication to keep the blade from gumming up with debris or catching on the material. The lubrication also protects the blade and prevents overheating, reducing the risk of chipped tips.

Always Clamp The Materials Properly

After choosing the right blade and lubrication, you need to secure the aluminium. A miter saw clamps down the material as you cut while a circular saw can pull. To keep the material secure, use multiple clamps. 

Conclusion

Cutting aluminium with a circular saw requires a few special steps. Ensure that you have the right blade. An ordinary blade is more likely to grab the material. If possible, purchase a blade specially designed for cutting aluminium and other non-ferrous materials.