An inexpensive LED flashlight solves this tablesaw alignment challenge
Illustration LED flashlight on tablesaw

The lighting in my shop and the shadows it creates make it difficult to check the angle of the tablesaw blade with a square. As the saw blade approaches 90° it gets more difficult to see any gap between the square and blade.

I keep an inexpensive LED flashlight hanging on my tablesaw just for this purpose. It has a magnet that I use to attach the light to the saw blade just behind my square. Then I adjust the tilt  angle of the blade until there is no light between the blade and the square—a perfect 90°.

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