How often should I replace grinder burrs?

Steel burrs last roughly 250 to 500 kg (550 to 1,100 lb) of coffee, ceramic longer. Most home grinders never wear a set out, and dull burrs creep up slowly.

When Should I Replace My Grinder Burrs?

Burrs wear. The cutting edges round off, so they crush more and cut less, producing more fines and a wider particle distribution.

Rough lifespans

Steel burrs: around 250 to 500 kg (about 550 to 1,100 lb) of coffee, depending on quality and how much you grind at espresso fineness.
Ceramic burrs: substantially longer, often quoted at double, since ceramic holds an edge better.
Titanium-coated or nitrogen-hardened: longer again.

For perspective, a household using 500 g (17.6 oz) a week gets through 26 kg (57 lb) a year. At that rate a steel burr set lasts a decade or more, which is why most home grinders never need new burrs.

Busy cafés often replace them every year or so.

How to tell they are dull

The change is gradual, which is what makes it easy to miss. Watch for:

Shots slowing at the same setting. More fines means more resistance, so you find yourself grinding coarser over time to keep the same shot time.
More fines and dust in the grounds.
Muddier flavor. Less clarity, more general bitterness, harder to dial in.
Grinding taking longer for the same dose.

Before you replace them, clean them

The symptoms of dull burrs and dirty burrs are almost identical. Coffee oils and compacted fines build up on the cutting edges and in the threads, which slows grinding and widens the distribution exactly as wear does.

Take the burrs out, brush them, and if there is a lot of buildup use grinder cleaning tablets. On many grinders this restores performance completely.

What to buy

Manufacturer burrs are the safe choice, and on grinders like Baratza they are cheap and documented. Aftermarket burr sets exist for popular grinders and can genuinely improve on the originals, though alignment becomes more critical.

What people want to know

Can I sharpen burrs?

No. They are hardened and precisely shaped, and there is no home method that restores geometry rather than destroying it.

Does grinding oily dark roasts wear burrs faster?

It gums them up faster, which is a cleaning problem rather than a wear one. Light roasts are denser and harder, and arguably wear burrs faster.

Do stones in coffee damage burrs?

Yes, and a stone is the most common cause of a chipped burr. Specialty coffee is sorted carefully, so it is rare, but a sudden loud crack while grinding is worth checking for at once.

Last reviewed 30 October 2026

Keep reading

Is a blade grinder ever acceptable?
For French press and cold brew, just about. For espresso, never. A blade grinder still beats week-old pre-ground coffee; a hand burr grinder beats both.
Flat or conical burrs for filter coffee?
Either works for filter coffee. Flat burrs lean toward clarity, conical toward body, and the gap is smaller than the grinder's overall quality and alignment.
Can I grind coffee the night before?
You can grind coffee the night before, but it costs flavor: ground coffee is noticeably degraded within about 30 minutes and clearly stale within a day.
Should I sieve my coffee grounds?
Sieving out fines measurably cleans up the cup but costs time and 10 to 25 percent of your coffee. Worth doing once to learn what fines do to flavor.
Should I single dose my grinder?
Single dosing a grinder, weighing in exactly what you brew, gives freshness and easy bean switching but makes retention matter. With one blend, use the hopper.
What is burr alignment and does it matter?
Burr alignment is whether the two burrs sit parallel. Misalignment grinds at two sizes at once, widening the spread, and is common even on good grinders.