Why does my plywood tear out?

Three causes: (1) Wrong blade — you need 80-100T high-angle ATB for plywood, not a 40T combo blade. (2) Dull blade — blades that worked on solid wood may produce tearout on plywood much earlier. (3) Cutting direction — finished face down on table saw, finished face up on miter saw (reduces tearout on the visible side). For zero-tearout cuts on premium plywood (cabinet doors, finish work), score the cut line with a knife first or use a zero-clearance throat plate.

Can I use a wood blade on aluminum?

No — dangerous and ineffective. Wood blades have positive hook angles (15-20°) that “grab” aluminum, causing kickback. Aluminum needs negative hook angle (-5° to 0°) and TCG geometry. Use a dedicated non-ferrous metal blade. Lubricate the cut with cutting wax or WD-40 to prevent the blade from gumming. NEVER cut steel with any saw blade designed for wood or aluminum — fire and fragmentation risk.

What's a thin-kerf blade?

Thin-kerf blades have a narrower cut path (typically 0.090" vs 0.125" full-kerf). Cuts faster with less motor strain — recommended for under-15 amp table saws. Tradeoff: thinner blade plate is more prone to flexing, which can produce slightly rougher cuts. For low-power saws and standard cuts, thin-kerf is the right default. For premium furniture-grade cuts on a 3+ HP cabinet saw, full-kerf gives stiffer and cleaner results.

How long should a blade last?

Quality 10-inch blades typically last 200-500 cuts in hardwood before needing sharpening. Cheap blades may dull in 50-100 cuts. Sharpening costs $15-30 per blade, can be done 3-10 times before the blade is worn out. Signs of dullness: burning marks on cuts, increased feed pressure required, rough or chipped cut quality, motor slowdown during cut, smoke. A genuinely sharp blade cuts effortlessly with no smoke or marks.

Should I buy expensive blades?

Yes for primary blades. Forrest, Freud Diablo Industrial, CMT, Amana — quality blades ($50-150 range) cut better, last longer, and resharpen well. Cheap blades ($15-30) work for occasional rough cuts but produce burn marks, tear out plywood, and dull fast. For a hobbyist table saw, one quality 40T combo blade plus one 80T ATB crosscut blade covers 90% of work and costs less long-term than rebuying cheap blades.

Saw blades have a maximum safe RPM rating printed on them. If your saw spins faster than the blade's rating, the blade can fail catastrophically — fragmented carbide teeth at 100+ mph. Standard table saws run 4,000-5,500 RPM; miter saws 4,000 RPM; circular saws 5,000-6,000 RPM. Most quality blades are rated 7,000-9,000 RPM, well above any saw. But always check before using a blade you're unsure about, especially used or repurposed blades.

Home & Life · Free tool

Saw Blade Tooth Count Guide

Find the recommended tooth count and blade type by material and cut style instantly online. Get ripping, crosscut, or combo guidance free, no download.

Updated June 2026

Saw Blade Tooth Guide

Pick the right blade tooth count and geometry for your material and cut type.

Material

Cut type

Tooth count80T

Blade typeATB fine-finish

Hook angle5-10° positive

Table saw RPM3,500 - 4,200 RPM

Safety: Sharp blade required; burn marks mean dull teeth. Always wear eye protection and keep guards installed. Let the blade reach full speed before entering the cut.

Rule of thumb: more teeth = smoother cut but slower feed + more heat. Fewer teeth = faster rip with larger gullets to clear chips.

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What it does

The right saw blade dramatically affects cut quality, blade life, motor strain, and safety. The four key blade specifications: tooth count (more teeth = smoother cut + slower feed; fewer teeth = faster, rougher cut), tooth geometry (ATB = Alternate Top Bevel for crosscutting wood; FTG = Flat Top Grind for ripping; TCG = Triple Chip Grind for laminates and aluminum; ATBR = Alternate Top Bevel with Raker for combo rip/crosscut), kerf width (thin-kerf 0.075-0.090" cuts faster with less motor strain; full-kerf 0.125" is stiffer for cleaner cuts but slower), and arbor size (5/8" standard for table saws; check your saw). Wrong blade choice tears wood, burns finish, kicks back dangerously, or destroys the blade and motor.

Standard recommendations by material and cut: ripping solid wood (cutting along the grain) — 24T flat-top-grind rip blade. Crosscutting solid wood — 60-80T ATB. Plywood / melamine / veneers — 80-100T high-angle ATB (HiATB) for clean edges without tearout. Aluminum / non-ferrous metals — TCG blade with negative hook angle, designed for non-ferrous (DON'T use wood blades on metal — dangerous, ruins blade). Laminate flooring — TCG, 80T. Combo blade (general purpose) — 40-50T ATBR; compromise blade that does both rip and crosscut adequately but neither excellently. Dado blades (for grooves) — stacked dado set, 6-8 inch diameter, varies.

Safety considerations the guide surfaces: (1) Match blade RPM rating to your saw — a blade rated 7,000 RPM on a saw spinning 8,500 will fly apart catastrophically. (2) Inspect blades before use — cracked teeth or warped plates are immediate scrap. (3) Hook angle matters — positive hook angle (15-20°) for fast cuts in soft wood; negative hook (-5° to 0°) for non-ferrous and laminate (prevents grabbing). (4) Sharpening — quality blades can be professionally resharpened 3-10 times, extending life dramatically. Cheap blades (under $30) usually aren't worth resharpening. (5) Never force a dull blade — burning, smoking, kickback all signal dull blade or wrong blade for the job.

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How to use it

Pick the material you're cutting (solid wood, plywood, MDF, aluminum, laminate, etc.).
Pick cut type: ripping (along grain), crosscutting (across grain), or combo.
Read recommended tooth count, geometry (ATB/FTG/TCG), and hook angle.
Check arbor size and RPM rating against your saw.
Match thin-kerf vs full-kerf to motor power (thin-kerf for under-15 amp saws).

When to use this tool

Buying a new blade for a specific project — confirm match to material and cut.
Diagnosing poor cut quality — wrong blade is the most common cause of tearout, burn marks, and rough edges.
Setting up a new table saw or miter saw — picking the starter blade.
Comparing blade options at the hardware store.
Onboarding a new shop helper — quick reference for what blade to use when.

When not to use it

Hand saws and pull saws — those have different tooth conventions (TPI = teeth per inch, different geometry).
Bandsaws — those use different blade specifications entirely (TPI, kerf, set).
Specialty cuts (laser-cut, water-jet, plasma) — different mechanics and blade categories don't apply.
Reciprocating saws (Sawzall, jigsaw) — those have their own blade conventions per material.

Common use cases

Quick use during a typical workday
Pre-decision sanity-check on inputs and outputs
Educational use — demonstrating the underlying concept
Onboarding a colleague who needs the same calculation/conversion

Frequently asked questions

Why does my plywood tear out?: Three causes: (1) Wrong blade — you need 80-100T high-angle ATB for plywood, not a 40T combo blade. (2) Dull blade — blades that worked on solid wood may produce tearout on plywood much earlier. (3) Cutting direction — finished face down on table saw, finished face up on miter saw (reduces tearout on the visible side). For zero-tearout cuts on premium plywood (cabinet doors, finish work), score the cut line with a knife first or use a zero-clearance throat plate.
Can I use a wood blade on aluminum?: No — dangerous and ineffective. Wood blades have positive hook angles (15-20°) that “grab” aluminum, causing kickback. Aluminum needs negative hook angle (-5° to 0°) and TCG geometry. Use a dedicated non-ferrous metal blade. Lubricate the cut with cutting wax or WD-40 to prevent the blade from gumming. NEVER cut steel with any saw blade designed for wood or aluminum — fire and fragmentation risk.
What's a thin-kerf blade?: Thin-kerf blades have a narrower cut path (typically 0.090" vs 0.125" full-kerf). Cuts faster with less motor strain — recommended for under-15 amp table saws. Tradeoff: thinner blade plate is more prone to flexing, which can produce slightly rougher cuts. For low-power saws and standard cuts, thin-kerf is the right default. For premium furniture-grade cuts on a 3+ HP cabinet saw, full-kerf gives stiffer and cleaner results.
How long should a blade last?: Quality 10-inch blades typically last 200-500 cuts in hardwood before needing sharpening. Cheap blades may dull in 50-100 cuts. Sharpening costs $15-30 per blade, can be done 3-10 times before the blade is worn out. Signs of dullness: burning marks on cuts, increased feed pressure required, rough or chipped cut quality, motor slowdown during cut, smoke. A genuinely sharp blade cuts effortlessly with no smoke or marks.
Should I buy expensive blades?: Yes for primary blades. Forrest, Freud Diablo Industrial, CMT, Amana — quality blades ($50-150 range) cut better, last longer, and resharpen well. Cheap blades ($15-30) work for occasional rough cuts but produce burn marks, tear out plywood, and dull fast. For a hobbyist table saw, one quality 40T combo blade plus one 80T ATB crosscut blade covers 90% of work and costs less long-term than rebuying cheap blades.
What's RPM matching?: Saw blades have a maximum safe RPM rating printed on them. If your saw spins faster than the blade's rating, the blade can fail catastrophically — fragmented carbide teeth at 100+ mph. Standard table saws run 4,000-5,500 RPM; miter saws 4,000 RPM; circular saws 5,000-6,000 RPM. Most quality blades are rated 7,000-9,000 RPM, well above any saw. But always check before using a blade you're unsure about, especially used or repurposed blades.

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