How does a juicer separate?

Juicing has become an incredibly popular way to get more nutrients into your diet. Fresh fruit and vegetable juices are packed with vitamins, minerals, and other beneficial compounds. But to unlock all that nutritional goodness, you need a juicer that can efficiently separate the juice from the pulp.

How Juicers Work

There are several different types of juicers, each with its own method for separating juice from pulp. But they all work on the same basic principle – they extract the liquid parts of fruits and veggies from the fibrous pulp. Here’s a quick overview of the main juicer types and how they work:

Juicer Type How It Separates Juice
Centrifugal Uses a fast spinning metal blade to shred produce, then spins the juice away from the pulp through a strainer.
Masticating Crushes produce between gears or disks to squeeze out the juice, then separates it through a screen.
Triturating Works like a masticating juicer but has twin gears to grind produce more thoroughly.
Hydraulic Press Uses hydraulic pressure to squeeze juice out of fruits and veggies.

Now let’s look at the different types of juicers in more detail to understand exactly how their unique mechanisms work to get juice away from pulp.

Centrifugal Juicers

Centrifugal juicers are the most common and affordable models on the market. Inside the juicer is a flat blade basket that spins at very high speeds – some at over 10,000 RPM. Here are the key steps to how centrifugal juicers separate juice:

  1. Fruits or vegetables are fed through a tube into the fast spinning shredder blade.
  2. The spinning metal blade grates or shreds the produce into tiny pieces and flings it against the basket wall.
  3. The juice passes through tiny holes in the basket wall while the pulp stays inside.
  4. The juice spins out into the inner wall of the juicer and flows down into a container.
  5. The pulp stays behind in the basket which has to be periodically emptied.

The spinning forces and centrifugal motion separate the dense pulp from the liquid juice very efficiently. The juice ends up squeezed out and separated with the pulp left behind in the basket.

Masticating Juicers

Also referred to as cold press or slow juicers, masticating juicers crush fruits and vegetables into juice. There are two main types – horizontal and vertical:

Horizontal Masticating Juicer

  • Produce goes through a small tube into a chamber with a turning auger or gear.
  • The auger crushes the produce against a screen or wall to squeeze out juice.
  • The pulp remains inside the turning gear while the juice passes through strainer holes.
  • Juice flows out one spout while pulp comes out another.

Vertical Masticating Juicer

  • Produce drops into a chute onto a rotating disk.
  • A fixed gear presses onto the disk, crushing the produce.
  • The pulp is pressed into the disk’s grooves while the juice flows through strainer holes.
  • The juice flows down a chute while the pulp stays in the disk to be ejected later.

In both types, the produce is crushed and squeezed to separate the juice from the interior pulp. The pulp can’t fit through the small holes so the juice flows out while the pulp stays inside until ejected.

Triturating Juicers

Triturating juicers, also known as twin gear juicers, are very efficient at extracting juice. They work similarly to masticating juicers but have two gears that work together to grind the produce.

The steps for how triturating juicers separate juice are:

  1. Produce goes through a chute in between the two metal gears.
  2. The gears rotate inward and crush the produce into a fine pulp.
  3. The pulp is continually crushed into smaller and smaller pieces to extract all the juice.
  4. The pulp remains inside the twin gears while the juice passes through a strainer.
  5. One spout lets out the juice while another ejects the dry pulp.

The super fine grinding separates every last bit of juice from the pulp. Triturating juicers have the highest juice yields but are also the slowest type.

Hydraulic Press Juicers

Hydraulic press juicers use pressure rather than cutting or grinding to get juice out of produce. There are two main types – manual and electric:

Manual Hydraulic Press

  • Produce is placed inside a stainless steel basket or cylinder.
  • A lever arm is pulled down which exerts hydraulic pressure.
  • The pressure squeezes the juice out through small holes at the bottom.
  • Pulp stays in the basket while juice flows down into a collecting cup.

Electric Hydraulic Press

  • Produce goes into a cylinder attached to a motorized hydraulic press.
  • An electric pump applies upward pressure to a plate at the bottom.
  • The plate squeezes the produce, extracting the juice.
  • Juice escapes through small holes into a container below.
  • Pulp remains inside the cylinder and has to be removed after.

Hydraulic presses generate tons of pressure to squeeze every last drop of juice from the produce. The juice is literally pressed out while the pulp stays put inside the cylinder or basket.

How Materials Impact Juice Separation

The different materials that juicer components are made from can impact how well they separate juice from pulp. Here are some key considerations:

Component Material Benefits
Juicing Screen Stainless Steel Durable, juice doesn’t soak into it
Plastic Prone to tearing over time
Juice Bowl Stainless Steel Won’t absorb juice, easiest to fully clean
Plastic Can stain over time
Gears Stainless Steel Very durable
Plastic Weaker, can crack or strip

Stainless steel components like strainers, juice bowls, and gears tend to be the most efficient and long-lasting. Plastic gears and strainers will still get the job done but may be more prone to wear and tear over time.

Common Problems That Impact Separation

To make sure your juicer is properly separating juice from pulp, watch out for these common problems:

  • Pulp in the Juice: Small pieces of pulp making it into your juice is usually a sign the screen is wearing out. Time to replace it.
  • Low Juice Yield: If you’re getting very little juice for the amount of produce you put in, the juicer parts likely need cleaning. Pulp buildup or clogs can block juice flow.
  • Leaking: Drips and leaks around the rim while juicing often mean the bowl/housing is misaligned. You may need to realign or tighten parts.
  • Excess Pulp in Basket: If lots of wet pulp is clinging inside the basket, try alternating soft and hard produce or cut produce into smaller pieces.

Taking apart the juicer and thoroughly cleaning all parts after each use can prevent many of these separation problems. And be sure to inspect and replace any worn parts like screens, gaskets, and gears regularly.

Tips for Best Separation

Here are some tips to help your juicer work its separating magic:

  • Alternate between soft and hard produce.
  • Cut produce into smaller pieces so it feeds through easily.
  • Don’t overstuff – let the chamber clear between batches.
  • Remove peels from waxy fruits and rinds from citrus.
  • Push produce through with food pusher, don’t just drop it in.
  • Clean thoroughly after each use.
  • Replace worn parts regularly.

Following the manufacturer’s usage directions can also help your juicer optimally separate liquid from pulp. With proper maintenance and use, your juicer can deliver plenty of pulp-free, nutritious juice.


Juicers utilize several different mechanisms – centrifugal force, grinding, crushing, and hydraulic pressure – to efficiently separate juice from the pulp of fruits and vegetables. Each type has its own method, but all are designed specifically to extract the liquid parts while leaving behind the fiber-rich pulp. Materials like stainless steel versus plastic impact the durability and efficiency of separation over time. By understanding how your juicer works and keeping it well maintained, you can enjoy the maximum amount of nutritional juice.

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