The Blade Does the Cutting, Not the Motor

When a cut comes out ragged, it is tempting to blame the saw. In most small home workshops the real culprit is the blade: the wrong tooth count, a dull edge, or a face caked in resin. A sharp, well-matched blade will make an ordinary circular saw or mitre saw feel far more capable than its price suggests, and it will noticeably reduce the effort needed to push timber past the teeth — something you feel keenly if your bench is not bolted to a solid floor.

Getting this right comes down to three things: tooth count, tooth geometry and blade material. Match all three to the timber in front of you and clean cuts stop being a matter of luck.

Tooth Count: The First Number to Get Right

Tooth count governs the trade-off between speed of cut and quality of finish. More teeth means more cuts per revolution, which shears fibres cleanly but clears waste slowly and builds heat. Fewer teeth cut fast and cool but leave a rougher edge. For circular saw blades, the total tooth count matters; for handsaws, it is teeth per inch (TPI).

• Ripping solid timber: 18–24 teeth. Large gullets carry away long shavings without clogging. Feed at a steady rate and let the blade do the work.
• General crosscutting: 40 teeth. This is the sensible all-rounder for a small workshop — good on planks, sheet goods and framing timber.
• Fine joinery, trim and veneered board: 60–80 teeth. Slower, hotter, but the finish off the blade is often good enough to glue or finish straight away.
• Handsaws: 7–10 TPI for ripping, 10–14 TPI for crosscutting, and 15–20 TPI for tenon and dovetail work. A fine-toothed saw in coarse timber will wander; a coarse saw in thin stock will splinter it.

Tooth Geometry and Set: What the Shape Is Doing

Tooth count alone does not tell the whole story. The profile of each tooth decides how it slices through grain.

• Flat-top grind (FTG): a square, chisel-like edge. Excellent for ripping along the grain and for cutting grooves, but it tears across the grain.
• Alternate top bevel (ATB): teeth angled left and right, scoring the fibres before lifting them. This is the geometry behind most general-purpose and fine crosscut blades.
• Triple-chip: a flat raker tooth flanked by bevelled teeth. Designed for laminates, melamine and veneered board, where chipping is the enemy.
• Hook angle: a positive hook pulls the work into the blade aggressively — good for ripping softwood, risky in a table saw where it can contribute to kickback. Negative hook blades, common on mitre saws, push the work away and give more control.

Set — the amount each tooth is bent outwards — determines kerf width and clearance. A thin-kerf blade removes less material, so it is easier on underpowered motors, but it flexes more in thick hardwood. If you are cutting thick oak on a modest saw, a standard-kerf blade will usually track straighter.

Blade Material: Carbide Versus the Rest

Almost every circular saw blade worth buying today is tipped with tungsten carbide (TCT). The hardened tips stay sharp many times longer than steel, hold their geometry through abrasive sheet goods, and can be resharpened several times. If you cut plywood, MDF or any manufactured board with regularity, carbide is not a luxury; it is the only sensible choice.

High-speed steel (HSS) blades cut keenly and cost little, but they dull quickly in hardwood and are best kept for softwood and occasional jobs. Carbon steel jigsaw and handsaw blades sit in the same bracket. Coated blades — usually with a low-friction finish — reduce resin build-up and run cooler, which is a genuine benefit when cutting pitchy softwoods such as pine.

One rule worth remembering: a cheap carbide blade will outperform an expensive steel one in almost every situation a home workshop will meet.

Matching the Blade to the Material

• Hardwood (oak, ash, maple): a 40–60 tooth ATB blade with a moderate hook angle. Hard grain dulls edges quickly, so keep a dedicated blade for hardwood and do not use it on sheet goods.
• Softwood: 24–40 teeth with a positive hook. Fast cutting, but soft fibres bruise easily, so support the underside to avoid breakout.
• Plywood and veneered board: 60–80 teeth, ideally triple-chip. Cut with the best face upwards on a circular saw and downwards on a table saw.
• MDF and melamine: fine triple-chip blades. MDF is abrasive and dusty; expect to resharpen sooner than you would like.
• Fine joinery: a fine-toothed tenon saw or a high-tooth-count blade used with a zero-clearance insert.

Setup and Technique: Getting the Best from Any Blade

The finest blade in the rack will still tear out if the setup is poor. Fit a zero-clearance insert or a sacrificial backer board — a strip of scrap clamped behind the cut line supports the fibres as the teeth exit. Let the blade reach full speed before entering the timber, and feed at a rate that keeps the motor from labouring; forcing the work is what causes burning, wander and kickback.

Clean blades cut better. Resin and pitch build up behind the teeth and effectively blunt the blade, so soak it in a suitable blade cleaner or wipe it with a solvent and a soft brush every few sessions. Store blades in their sleeves, not loose in a drawer where teeth can chip. Finally, be realistic about sharpening: a carbide blade used daily may need attention once or twice a year, while one used occasionally will last far longer.

Spend a few minutes matching blade to material and your cuts will be cleaner, your saw will work less hard, and your sanding will be considerably shorter.