HSS vs TCT Planer Blades: Material, Life and Application

When you buy planer or jointer blades you face one core choice: HSS (high-speed steel, e.g. W18) or TCT (tungsten carbide tipped). Both cut wood; they differ in hardness, lifespan and price. Here is how to choose.

What Is HSS (W18)?

W18 is a tungsten high-speed steel grade common in woodworking blades. It is tough, easy to regrind, and inexpensive. Our W4 HSS Planer Blade, W18 HSS Planer Knife 330-510mm, W18 HSS Planer Knife 600-650mm and W18 HSS Planer Blade 100-150mm are typical HSS options.

What Is TCT?

TCT blades braze a thin tungsten-carbide edge onto a steel body. Carbide is far harder than HSS, so it stays sharp much longer — especially on abrasive sheet goods. See TCT Planer Blade, TCT Electric Planer Blade, TCT Planer Blade 82×5.5×1.2mm and the carbide inserts on Spiral Cutter Head Blades.

HSS vs TCT: Comparison

Which Should You Buy?

Choose TCT if you cut hardwood, plywood, MDF or reclaimed wood — the carbide shrugs off abrasives. Choose HSS for softwood and general shop work where you regrind often and want low cost. Many shops keep both: TCT for sheet goods, HSS for everyday pine.

Frequently Asked Questions

Is TCT better than HSS for planer blades?

For hardwood, plywood and MDF, yes — TCT lasts far longer. For softwood and frequent regrinding, HSS is cheaper and good enough.

Can HSS blades be reground?

Yes. HSS is easy to regrind in any sharpening shop, which keeps running costs low.

Why does TCT cost more?

The brazed carbide edge is more expensive to make and must be professionally sharpened, but its long life offsets the price.

Which blade for MDF?

Use TCT. MDF is highly abrasive and wears HSS quickly.

Do I need different blades for jointer vs planer?

They often share the same blade type; match length, width and thickness to the machine, not the function.