Conical vs. Flat Burr Grinder: The Similarities, The Difference

Making coffee always starts with grinding coffee beans for the coffee drinkers that prefer to make their brews as fresh as possible.

And when it comes to grinding your coffee beans, you need to invest in a good grinder which in many instances means you need to choose between the two main types which are blade and burr grinder.

But the choice between blade and burr grinder is always an easy one for many coffee lovers given that the latter provides more consistent coffee grinds and is generally more efficient. However, with a burr grinder, you still need to choose between conical and flat burr grinders.

Both conical and flat burr grinders do an amazing job when grinding coffee beans, but there are some subtle differences between the two which you should know to make an informed choice. In this piece, we highlight these differences and also some of the similarities between the two grinders.

Overview

Conical Burr Grinder

Conical Burr Grinder

Conical burr grinders get their name from the fact that they will include some cone-shaped burrs. The burrs will consist of a cone-shaped ring that fits into another larger cone-shaped ring, and they will grind by pulling the beans between the rotating rings.

Unlike the flat burrs, the conical burrs will rotate at a relatively slower speed which means they will produce less noise and heat. The less heat means you are less likely to burn your coffee beans when using a conical burr grinder.

But the convenience and quieter operation that comes with the conical burr grinder comes at a price as they are generally pricier than the flat burr grinders.

Flat Burr Grinder

Flat Burr Grinder

With flat burr grinders, you get two flat-lying burr rings and hence the name. One of the rings faces downwards and the other upwards and when grinding the beans will fall between them where the sharp teeth will crash them into smaller particles.

Instead of relying on ridges to crash and grind the beans like with the conical burr grinders, the flat burr grinder will make use of sharp teeth on the edges of the flat plates.

However, the design and grinding mechanism of the flat burrs make them more prone to clogging than the conical burrs and will also produce more heat which increases the likelihood of burning the coffee beans.

Conical vs. Flat Burr Grinder

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Conical Burr Grinder

Flat Burr Grinder

Mechanism

Can be both electric and handheld

Always Electric

Taste

No difference

No difference

Wastage

Less waste

More waste

Heat

Low heat output

More heat generated

Noise

Quieter

Noisier

Cost

More affordable

Pricier

The best way to pick between the conical and flat burr grinder is by first trying out both and then settling for what works best for you. But, because this is not always possible given the cost implications, the best alternative is to have enough information on how they differ and their similarities.

Similarities

When looking at the flat and conical grinders from the surface, many people will hardly tell them apart without reading the description. Unless you take them apart there are no obvious differences between the two as they are quite similar in both appearance and performance. But here are the two key similarities between the two

1. Coffee Tastes the Same

Holding other factors constant such as the brewing time and type of coffee, coffee made from grounds from the flat and conical burr grinder will taste just the same. There is no real difference between the taste and a majority of coffee drinkers cannot tell what was used to make their grounds.

However, if you are grinding large volumes at a go using both grinders, the flat burr grinder is more likely to burn the coffee beans as it produces more heat. In case this was to happen then there would be some slight difference in the taste, but you would need to have very keen palates to notice.

2. Grounds Quality Is The Same

Both coffee grinders can produce some top-notch quality grounds regardless of the consistency you want. And this is unlike the blade grinder that can be quite inconsistent.

Since both grinders will have different settings, you will not only be able to get high-quality coffee grounds but can make adjustments to get your desired consistency.

Differences

Conical and flat burr grinder are both capable of producing high-quality and consistent grinds but the similarities probably end there. Anyone that has used both at some point will agree that once you understand the two, there are various noticeable differences from the amount of heat produces to the cost.

1. Work Mechanism

The working mechanism is quite different given that the conical burr grinder will use a couple of cone-shaped burrs and one burr will stay stationary while the other rotates during grinding, and the beans go in vertically but at a slight angle.

With the flat grinders, on the other hand, there are two rings of burrs that are set parallel to the ground and with one facing up and the other facing down. Like with conical burr one burr moves but the other stays stationary and coffee beans will be dropped down vertically.

Also, the flat grinder will spin faster and will hence require more power to operate which means they will mostly be electric while the conical burrs spin relatively slower meaning they do not require a lot of power which means they will also work for hand-operated grinders.

2. Heat Output

Overall the flat burr grinders are more powerful, and they will also spin faster than the conical burr grinder. And while this extra power can help to speed up the grinding process, it also comes with a huge disadvantage which is increased friction that results in more heat output.

Hence, the flat burr grinder will produce significantly more heat than the conical burr grinder which in some instances can be a big problem as it increases the likelihood of the coffee beans getting burnt during grinding.

3. Coffee Beans Wastage

When it comes to wastage, you will hardly find any grinder that can grind the coffee beans without wasting any at all but what matters is the quantity of beans wasted.

Both conical and flat burr grinder will waste some of the beans but the latter seems to waste significantly more coffee than the former due to its design and grinding mechanism.

Flat grinders have flat grinding burrs which means that some of the coffee ends up getting trapped in the grinding mechanism. And if you do not clean up the grinder thoroughly after every use, this trapped coffee can go bad and end up contaminating other batches of coffee beans you add to the appliance for grinding which in turn affects the quality of the coffee you make.

A conical burr grinder will have little wastage because the design and grinding mechanism means that most of the coffee will always flow straight down, and there are no hard to reach places where coffee can get trapped.

4. Noise

The extra power and speed that you get with the flat burr grinder also come with some extra noise and these grinders will be relatively louder than the conical burr types.

However, both coffee grinders will still produce some significant amount of noise when grinding and unless you use them side by side, it is hard to tell which one produces the most noise.

5. Cost

With their more powerful motors and ability to grind larger volumes of coffee beans within a short time, the flat burr grinders will come with a higher price tag than the conical burr grinders.

You can easily get a high quality electric conical grinder for even less than half of what you would pay to get a top-notch flat burr grinder. And if you go for a manual hand-operated conical grinder, you will even pay less.

Which One Should You Buy?

Whether you choose a conical or flat burr grinder, you can be confident of always getting highly consistent coffee grounds and an easy-to-use coffee grinder that will be more convenient to use than the cheaper blade grinders.

But when it comes to choosing between the two, it will be all up to your preferences and budget, and this is because their most important features are the same.

However, the conical burr grinder will be quieter, more affordable and will produce less heat and waste when grinding and will hence be more ideal for home users.

Flat burr grinders, on the other hand, are faster and more powerful and will also offer more control over the grinding process, but they are also pricier, noisier and produce more heat and waste and are hence better suited for commercial users such as cafes, restaurants and coffee shops.