How to Use Fellow Opus Coffee Grinder (Step-by-Step Guide)

It is a typical Sunday morning. You are at the kitchen counter with fresh beans from a local roaster. You press the button and hear that distinct, quiet whirring click. That is the sound of the Fellow Opus powering up. Fellow is a premium brand. 

We are in a different tier here compared to basic Ninja or Cuisinart models. If you want a great cup of coffee, your grind quality matters more than you might think. Figuring out how to use Fellow Opus coffee grinder properly changes everything. Let’s walk through it.

What Is the Fellow Opus Coffee Grinder?

Before you start brewing, let’s look at what this machine actually does. The Fellow Opus is a conical burr grinder. It uses 40mm stainless steel burrs to crush beans evenly. This single unit covers a huge range. You can grind fine for espresso or coarse for a French press.

It features 41 stepped grind settings. The hopper is made from BPA-free polycarbonate. Using food-safe materials is a big deal for health-conscious buyers.

If you ever used a cheap Cuisinart blade grinder or a basic Amazon pick, you know the struggle. Blade grinders chop beans into random, uneven sizes. The Opus crushes them into uniform pieces every time. Mastering how to use Fellow Opus coffee grinder gives you cafe-level flavor at home because of that exact consistency.

Who Should Buy the Fellow Opus?

This grinder fits perfectly into a few specific setups. It is great for home baristas who want cafe-quality coffee. I highly recommend it if you are finally upgrading from a basic Keurig or a standard drip machine. It also pairs wonderfully with machines like the Breville Barista Express. The Opus gives you enough control to dial in real espresso without spending a thousand dollars.

What You Need Before You Start

Setting things up correctly saves you a lot of frustration later. First, you need your Fellow Opus unit and the power cord. Next, grab some fresh whole coffee beans. Please do not use pre-ground coffee here. It defeats the entire purpose of owning a burr grinder.

You will also need your brewing device ready to go. This might be your French press, a pour-over dripper, or your espresso machine. Keep a clean, dry cloth nearby. Burrs do not like moisture at all. Finally, I suggest grabbing a small digital bean scale. Weighing your doses adds exact precision.

If you are just pulling it out of the package, you can check out our internal guide on how to set up Fellow Opus to get your station ready.

Checking Your Grinder Out of the Box

Take a close look at the burrs. There should be no factory debris or odd oils inside. Make sure the hopper is seated properly on top. You will feel a solid click when it locks into place. Plug the power cord into the wall. Run a quick five-second dry cycle with an empty hopper. Listen closely to the motor. You want to hear a smooth motor hum. It should just sound like spinning parts, not harsh grinding.

How to Set the Grind Size on Fellow Opus

This is where most beginners stall out. Do not worry. It is actually very simple. You just turn the outer dial. You will feel a very satisfying click as it rotates. Those numbers on the dial really matter. I always check the number before every brew. If you want a deeper look at its features first, check out our full Fellow Opus Review.

Grind Size Chart by Brew Method

Here is a quick guide to get you started. Lower numbers mean a finer grind. This leads to more extraction for espresso. Higher numbers mean a coarser grind. This means less extraction for cold brew or French press.

Brew Method	Grind Setting Range
Espresso	1 – 10
AeroPress	10 – 20
Pour-Over / Drip	20 – 30
French Press	30 – 41

How to Dial In for Your Coffee

Start right in the middle of your range. Then, brew a cup and taste it.

• Too bitter? Go coarser. Move to a higher number.
• Too sour or weak? Go finer. Move to a lower number.

Only change one setting at a time. Patience always beats guessing. Learning how to use Fellow Opus coffee grinder properly takes a few tries to get perfect.

How to Grind Coffee with the Fellow Opus (Step-by-Step)

Now it is time to make some coffee. Follow these simple steps every time you brew to get the best results.

Step 1 — Load the Hopper

First, remove the hopper lid. Add your fresh beans. I recommend weighing out 15 to 18 grams for a single cup. Do not overfill the top. The hopper holds about 80 grams max. Replace the lid and give it a slight twist until it locks.

Step 2 — Set Grind Size

Check the chart above. Turn the dial until your chosen number aligns with the indicator mark. You will feel a solid click. That confirms your setting is locked in.

Step 3 — Place Catch Cup

Slide the catch cup under the grind chute. The Fellow Opus comes with a nice magnetic catch cup. I suggest using it. Third-party cups work too. They just must fit snug under the chute so grounds do not fly out.

Step 4 — Power On and Grind

Press the power button. The grinder will run until the hopper empties. You can also press stop manually. Listen closely to the machine. A consistent hum is good. Stuttering means the setting is too fine or a bean is caught. You will notice the fresh grounds bloom a rich smell right away. That is the good stuff.

Step 5 — Tap and Transfer

Tap the catch cup two or three times. This dislodges any stuck grounds. Transfer the coffee to your portafilter, pour-over basket, or French press right away. Do not let the grounds sit around. Oxidation starts fast and kills the fresh flavor.

Tips for Getting the Best Grind Quality

Even a great grinder falls short with bad habits. These easy tips separate a good cup from a great one.

First, always use fresh beans. Beans roasted within two to four weeks work best. Stale beans just taste flat, no matter your gear.

Next, purge the grinder between size changes. Run about 3 to 5 grams of beans at the new setting before your real dose. This clears out old grounds.

Grind on demand. Do not pre-grind and store it. The Opus is built for a fast grind-and-brew workflow.

Keep your beans dry. Wet beans gum up the burrs fast. I store mine in a Fellow Atmos canister to block air and moisture.

Finally, weigh your dose. Eyeballing scoops is fine for a basic drip machine. But precision brings consistency every time.

Common Mistakes to Avoid

• Running it empty: Letting the motor run without beans can damage the burrs over time. It sounds harsh and metallic.
• Using oily dark roasts for espresso: Oily beans on the finest settings easily clog the chute.
• Ignoring grind retention: The Opus holds back about 0.3 grams of coffee. Account for this slight loss when weighing your beans.

Basic Maintenance Tips

Quick Cleaning Habits

A dirty grinder makes fresh beans taste bitter. Build these fast habits into your daily routine.

• Brush out the chute regularly to stop clogs.
• Keep the burrs completely dry. Never use water inside the machine.
• Remove trapped grounds weekly.

For a full walkthrough, see our complete guide on how to clean the Fellow Opus.

Fellow Opus vs. Other Grinders (Quick Context)

How does the Opus stack up? Here is a quick look at the U.S. market.

Fellow Opus vs. Baratza Encore: They share a similar price. However, the Opus wins easily on espresso range and overall build quality.

Fellow Opus vs. Breville Smart Grinder Pro: The Breville has more step options. But the Opus delivers better grind consistency for entry-level espresso.

Fellow Opus vs. Cuisinart DBM-8: This basic blade grinder is not even in the same category. The Opus is built for serious brewing, while the Cuisinart just chops beans randomly.

Frequently Asked Questions

Can Fellow Opus grind for espresso?

Yes. Settings 1 through 10 cover the espresso range. It pairs very well with entry-level Breville or DeLonghi machines.

Is the Fellow Opus BPA-free?

Yes. The hopper uses BPA-free polycarbonate. The entire bean path is made from FDA-approved, food-safe materials.

How long do Fellow Opus burrs last?

They are rated for over 500 pounds of coffee. This means you get years of daily home use before they need replacing.

Why is my grind inconsistent?

If you are still learning how to use Fellow Opus coffee grinder, check the basics first. Ensure your beans are fresh. Confirm the hopper is fully sealed. Finally, clean the burrs if they look clogged.

The Fellow Opus is easily one of the best grinders at its price point. It does not matter if your setup is Keurig-level or a full Breville espresso station. Better grind quality lifts every single cup. Just dial in your size, grind fresh, and adjust by taste. It is a simple loop. Repeat it daily for great coffee.