The three things that matter most:
Set your cutter diameter, flutes and RPM and read the feed rate and chip load. This is the same tool as the mdf feed & speed page, which carries the full chip-load reference table.
Your chip load is 0.3810 mm per tooth, which is within the recommended 0.305–0.457 mm range for mdf with a 6.35 mm upcut spiral.
MDF. MDF cuts freely but the resin binder is abrasive and will dull a cutter faster than any hardwood. Dust extraction is a health requirement here, not a convenience.
Upcut spiral. The baseline the published charts assume. Chips are lifted clear of the cut, which keeps heat out of the workpiece at the cost of tear-out on the top surface.
MDF is uniform and forgiving on geometry, so bit choice is driven by edge life, not tearout: use carbide, because the resin binder is abrasive enough to consume cutters quickly. Straight or upcut bits both work; a downcut helps keep the fine dust from being flung upward.
MDF cuts more predictably than any solid wood because it is homogeneous, so feeds are straightforward - keep the chip load sensible and the bit shears cleanly. Take the exact figure from the calculator, pre-filled for MDF below. The limiting factor here isn't the cut, it's managing dust and bit wear.
MDF is flat, stable and heavy, so it holds easily - a vacuum table or clamps and tabs are plenty. Its stability is one of the reasons it is a favourite for jigs and spoilboards.
This is the whole point with MDF: the dust. It is far finer than sawdust, hangs in the air, and is a real respiratory hazard because of the resin. You need high-volume extraction at the cutter, a dust boot, and a respirator - not a shop vac as an afterthought. Treat MDF dust management as a safety requirement.
MDF gives a clean, consistent edge when the bit is sharp; a furry or torn edge means the bit has dulled on the abrasive resin - change it. If the shop fills with fine dust, your extraction is losing, and that is a health problem before it is a finish one.
The consumables a fix like this usually calls for. Prices are live; we may earn a commission on a purchase, which never affects what we recommend.
MDF dust is a fine respiratory hazard, not just mess. A dust shoe and high-volume extraction at the cutter are a safety requirement, not an afterthought.
MDF's resin binder is abrasive enough to consume cutters quickly - carbide outlasts HSS by a wide margin here.
Tooling and technique are drawn from manufacturer documentation and established references; starting ranges are exactly that - the exact feed and chip load for your cutter come from the calculator above, never invented here.
