18 Espresso Machine Parts Names and Their Functions 

18 Espresso Machine Parts Names and Their Functions 

If you’re a beginner espresso machine user, a time will come you’ll start thinking about the espresso machine parts. How do they work, what are the names of each part and its function? 

The main espresso machine parts are the group head, portafilter, steam wand, group gasket, group dosing keypad, hot water pump, and power switch. 

Though there may be some small parts that you might know. But in this list, I’m gonna talk about 18 espresso machine parts and what they do to make the espresso shot. 

Espresso Machine Parts and Their Purpose

Group Head 

The group head is located on top of the espresso machine. It’s made from brass or stainless steel and is heated with either steam or electricity. 

The group head has two main functions: it creates pressure to push hot water through your ground coffee beans, and it holds the portafilter in place. 


Espresso machine parts Portafilter

The portafilter is what holds your ground coffee beans for extraction. It’s typically made from aluminum or stainless steel, and it comes with a handle.

So that it can be easily removed from the group head once extraction is complete. 

The portafilter should fit snugly into the group head. If it doesn’t, then it won’t be able to create enough pressure for proper extraction. 

Portafilter Filter Spring 

The portafilter filter spring sits inside the portafilter basket and helps keep your ground coffee beans in place during extraction. 

If this part isn’t properly installed, then your espresso shots won’t come out as expected. They may be weak or even lack flavor altogether. 

Portafilter Basket 

Espresso machine parts  Portafilter Basket 

The portafilter basket fits inside the portafilter, where your ground coffee beans go before extraction begins. 

The size of this basket determines how much espresso you can make at one time.

Typically, there are single-shot baskets for making one shot at a time, as well as double-shot baskets for making two shots at once. 

This part should be regularly cleaned to ensure that no residue builds up over time and affects future espressos shots.  

Group Gasket 

Espresso machine parts - group head gasket

Group gaskets are rubber seals that help create an airtight seal between the group head and the portafilter when they are clamped together. 

Without this gasket, hot water would leak out during extraction. Which means weaker espressos with less flavor. 

This part should also be regularly checked for wear and tear since it can become brittle over time and needs replacing if damaged. 

Group Screen 

Espresso machine parts Group Screen 

The group screen on an espresso machine is one of the most important parts. Because it contains the shower head where water passes through ground coffee to create an extract. 

This showerhead also helps regulate pressure as water passes through it into the portafilter for extraction.

When cleaning your espresso machine, you need to be sure to clean this part thoroughly so that it doesn’t get blocked or clogged.  

Group Dispense Switch 

The group dispense switch is used to control when water flows from the group head into the portafilter.

It prevents over-extraction and ensures that each shot of espresso tastes good by only releasing enough water for one shot. 

The Group Dispense switch is also important for controlling temperature. Because it stops the flow of hot water when not in use, helping keep your machine cooler overall. 

Group Dosing Keypad 

This keypad allows you to control how much ground coffee you want in each shot of espresso.

You can set different doses depending on what type of drink you’re making and how strong you want it to be. 

This keypad also allows you to save settings so that if you make multiple shots with similar doses, you don’t have to re-enter them every time.  

Hot Water Pump

Espresso machine Hot Water Pump

The hot water pump provides hot water which can be used for making tea, Americanos, or other drinks. That requires hot water instead of espresso shots like lattes or cappuccinos do. 

It’s important to remember that this pump should never be used while brewing an espresso shot. Since it could disrupt pressure levels and mess up your extraction process. 

Power Switch 

The power switch turns your machine on and off whenever necessary. It helps in saving energy when not in use and allows for easy access when needed again. 

Pressure Gauge 

Espresso machine Pressure Gauge 

The pressure gauge measures how much pressure is being exerted onto your grounds during extraction.

It ensures consistent taste from shot to shot as well as consistency between different types of drinks (like espressos versus cappuccinos). 

Sight Glass

The sight glass, also known as a boiler sight glass, is an important part of an espresso machine.

It allows you to visually inspect the water level inside the boiler. So you can make sure there’s enough water for making coffee. 

Steam Wand 

Espresso Machine Steam wand

The steam wand is located on the side of your espresso machine and is used to froth milk for cappuccinos and lattes. It has two parts:

  • A wand with a nozzle at one end.
  • A tip at the other end.

When using the steam wand, be sure not to point it directly at yourself or anyone else as hot steam could escape from the tip.

Steam Tip (Steam Wand Tip)

The Steam Tip (also known as the Steam Wand Tip) is an important component of any espresso machine’s steam wand system.

It connects to the end of your steam wand and helps create more consistent frothing results with less effort required from you. 

Steam tips have different-sized holes that allow for greater control when frothing milk for cappuccinos or lattes. 

Adjustment Ring or Knob 

This component is usually found near where your portafilter fits into your espresso machine.

It lets you adjust how finely ground your coffee beans need to be in order to produce good results from your machine. 

Bean Hopper

Espresso Machine Part Bean Hopper

As its name suggests, this component holds coffee beans until they are ready to be ground into fine powder by burrs inside your espresso machine’s grinder assembly unit. 

Some machines come with two bean hoppers. So you can store two types of beans separately.

Rather than having to clean out one hopper before refilling another (e.g., light roast vs dark roast). 


Espresso Machine Doser

A doser helps grinders regulate how much ground coffee gets dispensed into each shot of espresso being brewed.

Make sure that each shot contains just enough ground but not too much (which would result in over-extraction). 

Doses typically range between 5-10 grams per shot. Depending on how finely ground your beans are and what type of extraction method you are using (e.g., manual pull vs semi-automatic pump).


Burrs are sharp metal blades that rotate against each other inside most modern grinders. In order to break down whole coffee beans into smaller pieces.

They can be made of various materials such as stainless steel or ceramic.

Watch This Video: Espresso Machine Parts

Frequently Asked Questions (FAQs)

What is the Most Important Part of an Espresso Machine?

The most important part of an espresso machine is the boiler. The boiler heats the water to create steam, which powers the coffee extraction process.

If the boiler isn’t good quality, then the espresso machine won’t produce good-quality espresso.

For home espresso machines, it’s important to choose a model with a high-pressure boiler.

This will ensure that the machine can produce enough steam pressure to extract all of the flavors from the coffee grounds.

What Does the Portafilter Do in Espresso Machine?

The portafilter is a coffee filter that fits into the espresso machine. It holds the coffee grounds in place and allows water to flow through them to make the espresso.

The portafilter has a number of features that affect the quality of the espresso. Some tips are:

In order to create even pressure on the coffee grounds, the weight should be properly adjusted. 

The size and shape of the portafilter can affect the flow of water through the coffee.

The good-quality filters help to trap fines (small particles of coffee) and keep them from entering the espresso shot.

This helps to produce a cleaner-tasting drink with fewer sediment particles.


An espresso machine is made up of many essential parts. Each part plays an important role in producing a delicious cup of espresso.

Understanding these components will help cafe owners and coffee newbies alike.

Your Espresso Machine will continue to produce high-quality shots if you maintain it regularly by cleaning all parts after each use and checking them for wear & tear.

I hope now you’ve got the idea about all the espresso machine parts, but still, if you have any queries you can ask in the comment section.

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