Grind size is a very important factor in your goal of achieving the perfect flavour and happy machine performance. But there is more to it than just flavour. Did you consider that grinding too fine is not good?
One of our loyal clients, who is adventurous in their pursuit of the ultimate coffee, asked if ultra-fine coffee grounds cause excess pressure buildup and damage to coffee machines. Ever ready to help, the Bravo coffee experts explain the ins and outs of bean grinding and machine safety.
Can Super Fine Grinding Damage Your Coffee Machine?
The short answer is yes. A super-fine grind can cause issues with your coffee machine. Ultra-fine grounds create high resistance during extraction, making it difficult for water to pass through the coffee puck. This increases pressure inside the machine, which can lead to blockages, poor water flow and potential damage to internal components.
Many espresso machines are built to handle a range of pressures, but prolonged exposure to excessive pressure can wear down the pump, valves and seals over time. According to a study by the Specialty Coffee Association (SCA), improper grind size contributes significantly to machine maintenance issues.
For super-automatic coffee machines, fine grounds can clog the brewing unit, leading to incomplete extraction or machine errors. If your coffee machine starts making unusual noises or taking too long to brew, it could be a sign that the grind is too fine.
A Visual And Tactile Guide To Grinds
You can also rely on visual and tactile cues to determine whether your beans have been ground to the right consistency:
- Coarse Grind (French Press, Cold Brew): Large, even chunks resembling sea salt.
- Medium Grind (Drip Coffee, Pour-Over): Similar to granulated sugar.
- Fine Grind (Espresso): Soft and slightly clumpy, like table salt.
- Extra Fine (Turkish Coffee): Powdery, almost like flour.
The touch test: Rub the grounds between your fingers. If the texture feels gritty, it’s coarser; if it sticks together slightly, it’s a finer grind. Adjust accordingly based on the type of coffee you’re making.
Do Different Grinder Wattages Affect The Grind?
Yes, the wattage of your grinder can impact grind consistency and performance.
- High-wattage grinders (above 200W) generally have stronger motors, leading to more uniform grinding and better heat management.
- Lower-wattage grinders may struggle with fine grinds, producing uneven particles that can affect extraction.
- Burr grinders, especially those with higher wattages, provide more precision compared to blade grinders.
According to the Coffee Science Foundation, burr grinders produce a more consistent grind, which improves extraction efficiency and flavour balance.
The Final Grind
If you want to buy a grinder, chat with our team and we will happily guide you towards the best grinder for your needs. There are also grind-on-demand machines that will grind perfectly for you and trickle out that perfect brew.
Is your coffee machine humming and gurgling happily? Call the Bravo Coffee experts immediately if your beloved brew machine doesn’t sound right!
