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Circular Saw 101: How to Square the Saw Blade

Pro tips on checking the accuracy of your circular saw blade angle

In the second Circular Saw 101 video, This Old House contributor Mark Clement shows how to set and maintain the bevel adjustment at 90 degrees specifically for cutting perpendicular to a surface. The slightest degree difference can create a significant error while cutting, so for a precise measurement it's helpful to manually check and correct the blade's relationship to the shoe of the saw.

Learn how to:

• Set and maintain a 90-degree angle for a square cut

• Properly measure and adjust the blade angle

• Avoid making an error in cutting