Understanding Kerf in Panel Cutting
Kerf is one of those small details that separates accurate cutting from frustrating rework. It is the width of the slot left behind by a cutting tool — the material literally turned into dust or chips. Understanding and applying kerf correctly keeps panels on dimension and sheet counts reliable.
What kerf actually is
When a blade passes through a panel, it removes a strip of material as wide as the blade (plus any tooth set). That strip is the kerf. It cannot be recovered, so every cut permanently consumes a little material.
How to measure your kerf
The most reliable method: cut a piece, measure the two halves and the original, and the difference is your kerf. Alternatively, make a single cut in scrap and measure the slot width with calipers. Record this value for each blade you use.
How kerf affects yield
- Each cut line consumes one kerf width.
- Many parallel cuts accumulate significant lost material.
- Ignoring kerf makes packed layouts run short of stock.
- Including kerf keeps reported sheet counts trustworthy.
Applying kerf in software
Enter the measured kerf once in your optimizer. CutList Machine then inserts it between adjacent parts on every layout, so dimensions on the diagram match what comes off the saw.
Frequently asked questions
Does a thinner blade always save material?
A thin-kerf blade removes less material per cut, which helps yield slightly, but it can deflect more in thick stock. Balance kerf savings against cut quality for your material.
Is kerf relevant for CNC routers?
Yes. On a router the kerf equals the bit diameter, which is often larger than a saw blade, so it matters even more.
Put this into practice
Plan tighter layouts and cut less waste with the free CutList Machine optimizer.
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