5 Things to Look For in a Good Coffee Grinder

You can have great coffee beans, a good brewer and a carefully dialled-in recipe, but if your grinder isn't up to the task, you might not be getting the best out of your coffee. A good grinder does more than make coffee grounds finer or coarser. It gives you control over extraction, helps bring out the flavours you enjoy and makes your brews more consistent.

So what actually separates a good grinder from an average one? Here are five things we think are worth looking out for when choosing your next coffee grinder.

1. Grind Consistency: The Foundation of a Good Cup

Not all coffee grounds are created equal. When you grind coffee, you're breaking beans into thousands of smaller particles. Ideally, you want most of these particles to fall within a suitable size range for your brewing method. Less capable grinders tend to produce a wider mix of particle sizes, including:

• Fines: Very small particles that extract quickly and can slow down the flow of water, potentially contributing to bitterness or astringency.
• Boulders: Larger particles that extract more slowly and can contribute to under-extracted flavours.

Some variation is inevitable, and even desirable depending on how you brew. The goal isn't to eliminate fines entirely, but to produce a consistent and controlled grind.

Why does this matter?

Consistency makes your coffee easier to dial in. When you adjust your grind size, you want the resulting brew to respond predictably, rather than getting a different cup every time.

This is one of the biggest reasons to invest in a quality burr grinder. And it's something we prioritise when selecting the grinders we carry.

2. Burr Quality and Stability: It's More Than Just Sharp Blades

The burrs are the heart of your grinder. They're responsible for breaking down your coffee beans, and their design and construction play a major role in grind quality. Most hand grinders use either ceramic or metal burrs.

• Stainless steel burrs are commonly found in higher-performance hand grinders. They can be manufactured with precise cutting profiles, creating sharp blades and edges that cuts coffee beans in a more precise manner.
• Ceramic burrs are not prone to corrosion and commonly found in more entry level and affordable grinders. They can perform well, but their brittleness creates design trade-offs and poor longevity. Most importantly, unlike stainless steel burrs, ceramic burrs crush beans which generates uneven particle distribution and inconsistent grounds.

But burr material is only part of the equation. Burr stability matters too.

Imagine trying to cut something precisely while the blade keeps shifting. The same principle applies to coffee grinders. If the burrs move out of alignment while grinding, the gap between them changes. This can affect the consistency of your grounds. Meanwhile, a well-designed grinder keeps its burrs properly supported and aligned throughout the grinding process.

This is why features such as dual-bearing shaft support and rigid construction are worth paying attention to. However, bearings alone don't guarantee good alignment. The overall construction and manufacturing precision of the grinder matter just as much.

The takeaway? Don't judge a grinder by its burr material alone. How the entire grinding mechanism is built matters just as much.

3. Burr Geometry: Different Grinders, Different Flavours

Two grinders can use stainless steel burrs and still produce noticeably different cups of coffee. Why?

Because the shape and cutting pattern of the burrs, also known as burr geometry, influence the distribution of coffee particle sizes and ultiamtely affects how your coffee tastes. Depending on the burr design, you may experience:

• Greater clarity: Cleaner, more distinct flavours, where delicate floral, fruity and acidic notes stand out.
• More body: A fuller, heavier mouthfeel with a greater sense of richness.
• A balance of both: Good flavour separation while retaining sweetness and body.

Neither approach is necessarily better. It comes down to the kind of coffee you enjoy. For example, if you primarily brew light-roasted coffees using a V60 and enjoy delicate, tea-like cups, you might prefer a grinder designed with clarity in mind. And likewise, if you enjoy espresso, your priorities and grinder of choice might be different.

This is also why there isn't necessarily one perfect grinder for everyone and every brew method.

4. Grind Adjustment: How Much Control Do You Really Need?

Have you ever made an espresso that ran too fast, adjusted your grinder by one click, and suddenly found that the next shot barely flowed?

That's where grind adjustment precision matters.

Most manual grinders use a stepped adjustment system. Each click changes the distance between the burrs, allowing you to grind finer or coarser. This movement is often measured in microns (μm).

The smaller the movement per click, the finer the adjustment you can make.

It's worth noting that microns per click refer to burr movement, not the actual size of your coffee particles.

Pourover, AeroPress and French press generally allow more flexibility in grind adjustment. You can often make relatively larger adjustments without drastically changing the outcome of your brew.

Espresso, on the other hand, is much more sensitive to grind size. Even a small change can noticeably affect how quickly water flows through the coffee puck, changing your shot time and extraction. Finer adjustment steps give you more control when dialling in your espresso.

One important consideration: smaller steps don't automatically make a grinder better. The burr design, grind range and intended brewing method matter too. The best grinder is the one that gives you the right amount of control for how you brew.

5. Adjustment Mechanism: Small Details That Make a Big Difference

A grinder might produce excellent coffee, but if it's frustrating to use every morning, that matters too. Our favourite feature (one that we find extremely underrated) is an easy-to-use grind adjustment mechanism.

• Internal Adjustment: Traditional hand grinders often have its adjustment dial located underneath the burrs. To change the grind size, you typically need to remove the grounds catch cup and turn the adjustment dial. This works perfectly well, especially if you tend to stick to one brewing method. However, we find it to be be less convenient when switching between different beans or brewing recipes.
• External Adjustment: Modern hand grinders feature an external adjustment ring, allowing you to change the grind setting without removing the catch cup. The benefits - faster adjustment, easy tracking and better repeatability! For someone who regularly switches between espresso and pour-over, this convenience can make a real difference.

That said, internal adjustment isn't necessarily a dealbreaker. If you're mostly brewing one style of coffee, a well-built grinder with internal adjustment can still be an excellent choice.

So, What Makes a Good Coffee Grinder?

A good coffee grinder isn't simply the one with the sharpest burrs or the smallest adjustment steps. It's a combination of thoughtful engineering, consistent grinding performance and a design that suits how you like to brew.

When choosing a grinder, we'd prioritise:

1. Grind consistency for predictable extraction. 
2. Burr quality and stability for reliable and consistent grinding performance
3. Burr geometry to complement your preferred flavour profile
4. Adjustment precision to suit your brewing method
5. Adjustment mechanism to suit your daily workflow

Why We Recommend 1Zpresso

At Brew Simply, 1Zpresso has become one of our go-to recommendations for manual coffee grinders. What we like most is the value they offer. With thoughtfully designed burrs, solid construction and practical adjustment systems, 1Zpresso delivers many of the qualities we look for in a good grinder at a compelling price-to-performance ratio. Whether you're upgrading from an entry-level grinder, looking for more clarity in your pour-over or trying to dial in espresso more precisely, there's always a 1Zpresso model worth considering.

Not sure which one suits you?

Read our next guide to find the right grinder for your brewing style, or explore our range of 1Zpresso grinders.