To get precise cuts on your bandsaw, you need to make sure the table plays nice with the blade.
And that means occasionally checking for squareness.
You can of course just use a regular square (as long as it’s short enough to fit under the bandsaw blade guides — like this 3” magnetic speed square).
But my favorite method involves a nifty little test that shows squareness in real-time and with real cuts.
All you need is an offcut of wood with square and parallel edges (a 2x4 works great).
Here’s what to do.
1. MAKE A NON-THROUGH CUT
Set the offcut on its edge so the wider faces stand vertically.
Turn on the bandsaw and carefully cut into the board, stopping once the blade is fully embedded. Then pull the board away from the blade.
Make sure to keep the bottom edge flat on the table as you cut — and don’t cut all the way through.
2. FLIP THE BOARD UPSIDE DOWN
Once you've done the non-through cut, flip the offcut onto its opposite edge.
The faces will still stand vertically. But the original “bottom” edge is now facing up.
3. SLIDE THE KERF OVER THE BACK OF THE BLADE
Bring the board around to the back of the bandsaw blade.
Now gently try to slide the back of the bandsaw blade into the kerf-cut you made before.
It should slide in like a puzzle piece, without causing any flexing or deflection of the blade.
If the blade slides smoothly into the groove, your bandsaw blade and table are square to each other.
If the blade isn't groove-friendly, adjust the table angle as needed.
Fit the kerf around the blade, adjust the bandsaw table until the board's bottom edge sits flat, and test again as necessary.
Throw this test into your bandsaw routine every now and then as a quality check to keep your cuts on point.
It’ll keep your cuts sharp and square. Because the details matter, my friend!
Want to check if your square is actually square? Here’s a way to test.