A crooked band saw cut means the blade is not tracking square in the kerf. Low tension, guides that no longer support the band, uneven teeth, or feed that shoves the blade off line are more common than “the wrong product family.” Note whether the cut leans for the whole length, starts straight then drifts, or wanders left and right. Do not expect a same-size replacement to straighten the cut if the saw is still out of setup.
What the Cut Is Telling You
- Whole face tilted: guides are not square to the table, or the two sides are worn unequally.
- Straight at first, then worse: tension is low, the blade is dull, or feed rises as the cut deepens.
- Left–right wander with a shiny or fuzzy face: tracking is unstable-check wheel tires and bearings. Noise and vibration often show up together.
- Thin-wall tube drifts while solids look acceptable: TPI is often too coarse, so too few teeth are in the cut. See the band saw blade TPI guide for metal.
Check the Blade or the Saw First?
- A new blade still cuts crooked: start with tension, guide spacing, distance from guides to the work, table squareness, and clamping.
- An old blade suddenly drifts: look for one-sided tooth wear, lost set, or a shiny, scored back edge.
- Replacing the blade without resetting guides almost always brings the lean back.
- Still confirm the specification-measure length from the stamp, chart, or wheel path before you reorder.
Correction Checklist
| What you see | Likely cause | Correct this first |
|---|---|---|
| Kerf leans to one side | Guides not square; one guide worn | Stop and square the guides; do not increase feed to “push it back” |
| Bell-mouthed kerf | Guides too far from the work; blade floats | Move guides closer, then recheck tension |
| New blade, teeth still even | Tension or tracking | Reset tension per the saw; inspect wheel tires |
| Thin stock or tube especially crooked | TPI too coarse or feed too high | Reduce feed, confirm pitch; do not only raise speed |
Pitch and Feed Can Steer the Cut
Too few teeth in the cut put a high load on each tooth and let the band be pushed aside. Too many teeth pack chips, lift the blade, and make the kerf unstable. Feed should let teeth enter the material rather than glaze the surface; glazing can work-harden the face and make drift worse-especially on stainless.
When setup is restored and you need a fresh loop, shop by length on all blades, including 64-1/2", 72-1/2", and metal cutting. Portable saws: portable sizes guide. Browse more help in Blade Guides, or contact DEKOLY with a photo of the cut and the old blade.
FAQ
Is a crooked cut always low tension?
Low tension is common, but not the only cause. Guides out of square, a dull blade, and heavy feed also drift. Check guides and the table before you crank tension so you do not overstretch the band.
Can I increase feed to force a crooked cut straight?
No. More feed usually makes the lean worse and can strip teeth or break the blade. Reduce feed, square the guides, then decide whether the blade is still usable.
Does a wandering curve cut on wood count as “crooked”?
Curve cutting needs a blade narrow enough for the radius. A blade that is too wide will drift and wrinkle on the back. That looks like tracking error but is often the wrong width-see wood options in our wood cutting collection.
The new blade still cuts crooked. Should I keep replacing blades?
Do not use several blades as a test. If a new blade still leans, tracking or guides are not restored. Photograph the guides, wheels, and old tooth line, then reach out via Contact before you reorder from the factory-direct shop.
