Mind Your Teeth for Correct Circular Saw Blade Direction
Most of us have been there at some pointโฆstaring at a blade in one hand and a saw in the other, wondering what the correct circular saw blade direction is.
The first time I ran into it, I was a little less supervised than I should have been and put the blade on backward. I actually completed a cut, wondering why it cut so slowly, before my mistake was corrected. Getting the circular saw blade teeth to go in the correct direction is whatโs at the heart of the matter.
Pro Tips and Tricks: Lacking a proper cement board blade, some Pros intentionally put a framing blade on backward to cut cement board (Hardie Board).
Circular Saw Blade Rotation and Teeth Direction
The sawโs motor runs the blade rotation in a way that the circular saw teeth direction points up as it enters the wood youโre cutting. Itโs intentional to create the most stable, accurate, and safe cutting.
As the blade teeth hit the material, they rip from the bottom through the top. That rotation direction pulls sawdust and chips up into the guard, where they can eject through a dust port. Itโs the opposite of a table saw, where the teeth enter the cut from the top.
Correct Circular Saw Blade Direction
Getting every sawโs blade direction correct isnโt as simple as just slapping the label side out and cutting. Differences in blade orientation (which side of the saw the blade is on) change which side of the blade you see.
If you keep in mind that the blade rotation keeps the teethโs direction cutting upward, everything else from here is just icing on the cake. However, saw and blade manufacturers make it a little easier for you.
When you look at the sawโs blade cover, thereโs an arrow to let you know which direction the motor turns. On the blade, thereโs usually a directional arrow as well. When youโre installing your circular saw blade, itโs just a matter of making sure those two arrows match each other.
For blade-right models, the correct circular saw blade direction is usually with the label side out. For saws that have the blade on the left, it typically installs with the โuglyโ side out. Itโs not a hard, fast rule, though. You should always double-check.
In our experience, itโs usually blade-left saws where people get mixed up because they look better with the nice-looking side of the blade visible. But regardless of how it looks, itโs all about making sure those teeth cut from the bottom up.
What Direction Do You Turn the Bolt to Remove a Blade?
One of the questions we often run into is which direction to turn the bolt that secures the blade to the saw. One right-blade saws, the removal direction follows the expected rule: righty-tighty, lefty-loosey. On left-blade saws, however, the bolts are reverse-threaded. That means you have to do righty-loosey, lefty-tightyโฆ
Hereโs how to ALWAYS know which way to go: You always remove the blade by turning the bolt in the direction the blade spins. Thatโs itโif you remember this, youโll never have to guess which way to turn the bolt.
So there you have itโkeep those circular saw blade teeth pointing up, and follow the blade direction when removing the bolts. Ready for more circular saw tips? Check out this article!
