Blade Height at a Glance
Set the blade so the bottoms of the gullets (the curved spaces between teeth) just clear the top of the workpiece. That works out to 1/8" to 1/4" above the wood. Below that, gullets pack with sawdust, friction builds, and your cut burns. Above that, tearout on plywood gets worse. The gullet rule is the right setting for nearly every through cut you'll make.
| Standard rule | Gullets just above workpiece surface |
| Measurement | 1/8" to 1/4" above the wood |
| Freud's spec | One full tooth exposed above workpiece |
| Low-blade consequence | Packed gullets, heat, burn marks on hardwood |
| Real kickback prevention | Riving knife and blade guard, not blade height |
In this guide:
- Why the low-blade instinct gets it wrong
- The gullet rule and how to set it without a ruler
- Burn marks, tearout, and wandering cuts explained
- When to ignore the rule: dadoes and zero-clearance inserts
Part 1: Why Low Blade Feels Safer (But Usually Isn't)
The advice "keep the blade low" shows up everywhere. The logic sounds right: less blade above the wood means a smaller cut if your hand accidentally reaches the teeth. That concern is legitimate. A blade set 1/4" above the wood does less damage on contact than one set 3" above it.
But that reasoning addresses the wrong hazard.
The accidents that send woodworkers to the emergency room are kickback events. Kickback happens when the kerf pinches the rear of the blade, or when the rear teeth catch the workpiece and throw it back at the operator. Neither of those is primarily controlled by how much blade sticks up above the wood.
What controls kickback risk is your riving knife and blade guard. The riving knife sits immediately behind the blade and keeps the kerf from closing on the blade body. The blade guard physically prevents the workpiece from riding up over the rear teeth. Every modern table saw ships with both. As Stumpy Nubs' detailed breakdown of the blade height debate concludes: with proper guarding in place, blade height becomes a cut-quality decision, not a safety one.
A low blade doesn't make you safer. It makes you feel safer while producing worse cuts.
Part 2: The Gullet Rule
Gullets are the curved spaces between teeth on a saw blade. Their job is chip clearance. Each tooth takes a bite, the gullet behind it carries the chip, and as the blade rotates past the top of the workpiece, the gullet empties. The next tooth enters the cut with a clean gullet.
Set the blade too low and the gullets never fully clear the workpiece surface before the next tooth begins its cut. They reenter packed. Packed gullets add friction to every pass. Friction generates heat. In maple, cherry, or walnut, scorch lines appear on the cut edge within the first few inches. The BC Campus Woodworking Machinery textbook specifies that gullets should sit no more than 6mm (1/4") above the surface. In a Woodworking Stack Exchange discussion, Freud's recommendation is "one full tooth to clear the top of the wood, but no more," which works out to roughly 1/8" on most 10" blades.
How to set it without a ruler: Hold a scrap of the same thickness next to the raised blade. Raise the blade until the curved trough between two teeth just clears the top face of the scrap. Five seconds, no measuring required.
Part 3: What Goes Wrong
When the blade is too low:
Gullets pack. Friction builds. Burn marks appear on the cut edge, never the face. Maple and cherry are the most sensitive species; both scorch reliably if the blade is even 1/8" too low. On long rip cuts, you may also notice the blade wandering slightly. Heat causes the blade body to track toward softer grain rather than a straight line.
When the blade is too high:
The teeth exit the wood at a steeper downward angle. On solid wood this usually doesn't matter. On plywood and melamine it does. The steeper exit angle splinters the veneer on the bottom face. If your plywood cuts are chipping badly on the underside, try lowering the blade to 1/4" above the sheet.
| Symptom | Most likely cause | Fix |
|---|---|---|
| Burn marks on cut edge | Blade too low: packed gullets | Raise blade to gullet-rule height |
| Tearout on plywood bottom face | Blade too high: steep tooth exit angle | Lower to 1/4" above sheet |
| Blade wanders on rip cuts | Heat from packed gullets | Raise blade; confirm riving knife is fitted |
If you're burning maple or cherry and assume you need a new blade, try raising blade height first. That's the fix more than half the time.
Part 4: When to Break the Rule
Dado stacks:
Set the dado stack to the exact depth of the housing, rabbet, or groove you're cutting. The gullet rule applies to through cuts, where chips need to exit over the top of the workpiece. In a dado cut, you're removing material to a set depth and chips exit sideways. Gullet clearance above the surface doesn't factor in. This is a depth setting, not a clearance setting.
Zero-clearance insert creation:
Lower the blade fully below the table surface, then place the blank insert material over the table opening. With the saw running, slowly raise the blade through the insert blank to cut the kerf slot. Once the insert is in place, return to the gullet rule for normal cuts through it.
RELATED: Zero-Clearance Inserts: What They Are and Why to Make One A zero-clearance insert reduces tearout on the bottom face of sheet goods cuts. Pair it with correct blade height for the cleanest plywood edges your saw can produce.
Very thin material:
The gullet rule scales with thickness. For 1/4" plywood or hardboard, you still target 1/8" above the surface. That means a small amount of blade clears the top. The principle doesn't change.
Part 5: FAQ
How high should a table saw blade be above the wood?
Set the blade so the gullet bottoms just clear the top surface of the workpiece. In practice: 1/8" to 1/4" above the wood. Freud recommends one full tooth exposed. The BC Campus woodworking textbook sets the maximum at 6mm (about 1/4"). Either formulation lands you in the same range.
Does a higher blade prevent kickback?
Partially. A higher blade puts fewer teeth in the kerf, which reduces the chance of kerf-pinch kickback, the most common type. But the most dangerous kickback (rear-blade lift) can still happen regardless of height, and a higher blade means more exposed blade when it does. Your riving knife prevents kerf pinch; your blade guard blocks rear-blade lift. Use both every time.
Should I lower the blade between cuts?
Not between cuts during a session. At the end of a session, lower the blade until just the tooth tips clear the insert surface. This reduces accidental contact risk while the saw is off and the blade is coasting to a stop.
Sources
These sources informed the blade height recommendations, gullet mechanics, and kickback analysis in this guide.
- Stumpy Nubs — THIS SHOULD END THE SAW BLADE HEIGHT DEBATE — James Hamilton's comprehensive analysis of high vs. low blade tradeoffs, optimal height definition, and the role of guarding in kickback prevention
- BC Campus Woodworking Machinery — Table Saw Safety — academic textbook source; specifies gullets no more than 6mm/1/4" above workpiece surface
- Woodworking Stack Exchange Q1061 — Recommended blade height — Freud's one-tooth specification; detailed gullet-packing mechanism; kickback force analysis
- Fine Woodworking Forum — Tablesaw blade height — practitioner discussion of blade height in production work
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