Zerno Prebreakers

Our prebreakers control the flow of your beans while cracking them shortly before they enter the grind chamber.


The Result
Regulating flow allows your burrs to be more effective and productive, resulting in lower frictional temperature, which prevents premature brewing of your grounds.


Why it matters
This method produces a more uniform & consistent grind with every brew. Finally, you are able to experience all of the subtle qualities that each bean has to offer.

  • ZERNO is driving
    prebreaker innovation

  • Our engineering team spent years of R & D testing methods to find the ideal combination of feed rate and burr rpm – with the goal of achieving control over particle size distribution and ensuring grind uniformity.

new - Z1 prebreaker

Stainless Steel Medium Feed Auger

Compatibility: All Z1 Grinders. Launch Edition Grinders require the V2 prebreaker to be compatible.


Availability:
Standard with all Z1 grinders as of October 14th, 2025. Shipping begins Mid-November.


Category: All Purpose – Medium Fines


Overview:
This auger is an improvement from the original Medium Feed Rate Prebreaker – This design includes upgraded teeth that initiate the prebreaking process & optimize the flow of beans through the grind channel. Our new stainless steel design improves durability and performance.

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new - z1 prebreaker

Stainless Steel Slow Feed Auger

Compatibility: All Z1 Grinders. Launch Edition Grinders require the V2 prebreaker to be compatible.


Availability: Available as an optional add-on. Shipping begins Mid-November.

Category: Low Fines; high clarity and flavor separation.


Overview:
This is the first inverted design auger – Meaning that a small amount of beans is fed into the grind chamber at a time with minimal popcorning effect. This design drops your dial in point consistently, leading to a sharper peak and enhanced clarity. Our new stainless steel design improves durability and performance.

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Z1 prebreaker

Anodized Medium Feed Auger

Compatibility: All Z1 Grinders. Launch Edition Grinders require the V2 prebreaker to be compatible.


Availability:
Standard with all Z1 grinders ordered before October 14th, 2025.


Category: All Purpose – Medium Fines


Overview:
This auger is an improvement from the original Medium Feed Rate Prebreaker – This design includes upgraded teeth that initiate the prebreaking process & optimize the flow of beans through the grind channel.

Buy Now

z1 prebreaker

Anodized Slow Feed Auger

Compatibility: All Z1 Grinders. Launch Edition Grinders require the V2 prebreaker to be compatible.


Availability: Available as an optional add-on.

Category: Low Fines; high clarity and flavor separation.


Overview:
This is the first inverted design auger – Meaning that a small amount of beans is fed into the grind chamber at a time with minimal popcorning effect. This design drops your dial in point consistently, leading to a sharper peak and enhanced clarity.

Buy Now
Z1 Medium Feed Auger V1 (Discontinued) Zerno

Discontinued

Medium Feed Rate Auger v1

Compatibility: All Z1 Grinders. Launch Edition Grinders require the V2 prebreaker to be compatible.


Availability:
Not in Production. Available for warranty claims & special circumstances


Category: All Purpose – Medium Fines


Overview:
This is the standard auger that was included with all Z1 grinders from Batch 2 through 4. The v1 anodized auger was manufactured using 7000 series aluminum & designed to produce consistent results across a large variety of burrs.

discontinued

Fast Feed Rate Auger

Compatibility: Z1 Launch Edition


Availability: Not in Production


Category: All-purpose – High Fines


Overview:
Standard Auger included with most Z1 Launch Edition grinders.