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Circular Saw Blade Teeth Guide: 40T vs 60T vs 80T vs 120T
Tooth count is the most important choice on a circular saw blade for wood. Fewer teeth cut faster but rougher; more teeth cut slower but cleaner. This guide explains the trade-off and gives a simple selection table for 30T to 120T blades.
The Core Rule
Each tooth removes a chip. Fewer teeth = bigger bites = fast, rough cuts with easy chip clearance (good for ripping with the grain). More teeth = smaller bites = smooth finishes, but slower feed and more heat (good for crosscuts and sheet goods).
Tooth Count Selection Table
| Teeth (on 180–250 mm blade) | Character | Best for |
|---|---|---|
| 30–40T | Fast, aggressive | Ripping, framing, construction lumber |
| 50–60T | Combination | General carpentry, rip + crosscut |
| 80T | Fine | Plywood, veneered panels, cabinetry |
| 100T | Extra fine | Melamine, laminate, trim |
| 120T | Ultra fine | Veneers, picture frames, flawless miters |
Don't Forget Tooth Geometry
- ATB (Alternate Top Bevel): shears fibers like scissors — crisp crosscuts and plywood edges; standard on wood blades.
- TCG (Triple Chip Grind): alternating trapezoid/flat teeth — for laminate, aluminum, non-ferrous metals and plastics.
- MTCG: modified TCG for ferrous metal cold-cutting saws.
Diameter Affects the Math
Tooth count only makes sense per diameter: 40T on a 110 mm blade ≈ 80T on a 250 mm blade in tooth spacing. When comparing blades, compare teeth-per-inch at the rim, or simply follow the manufacturer's application label.
FAQ
What tooth count for cutting 2×4 framing lumber?
24–40T on a 7-1/4" blade — speed matters more than finish in framing.
Why does my high-tooth blade burn the wood?
Feeding too slowly, dirty pitch-covered teeth, or ripping thick stock with a finishing blade. Clean the blade and feed steadily.
Is more teeth always better for plywood?
Up to a point: 80T ATB is the plywood sweet spot. Beyond that, feed slows and heat rises without visible finish gains.
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