Open-box unit: This black Eureka Mignon Libra 55 was returned by a customer and has been cleaned, inspected and tested. Expect possible light handling marks. Quantity is normally one, so availability can change without notice.
A Lower-Cost Way into Grind-by-Weight Espresso
The Mignon Libra 55 is built around a simple idea: put the portafilter on the integrated fork, select a dose, and let the grinder stop according to weight instead of elapsed grinding time. That makes it especially useful in a home espresso bar where you want less weighing and topping-off during the morning rush.
Its 55mm flat burrs and stepless micrometric adjustment are espresso-focused. The compact Mignon body uses Eureka’s noise-reduction design, and the ACE system helps manage static and clumps as coffee leaves the chute. The built-in scale does not remove the need to dial in, but it does separate dose control from changes in grind speed caused by bean age or grind setting.
What You Are Buying
- A tested open-box Mignon Libra 55 in black
- Integrated grind-by-weight dosing
- 55mm flat burrs for home espresso
- Stepless micrometric grind adjustment
- Portafilter fork and touchscreen controls
Who Should Choose It?
This version suits someone who usually keeps one coffee in the hopper and wants repeatable doses delivered directly into a portafilter. It is less convenient for frequent bean changes than a true single-dose grinder. Filter-coffee users should consider the newer Libra 65 AP, whose burr and adjustment package is designed for a broader range of brew methods.
Open-Box Details
Open-box items are not factory-sealed new inventory. Review the product images and variant selection for the exact unit. Original packaging or minor accessories may vary. Espresso Outlet applies the same applicable warranty offered with a new unit; returns follow the current posted policy.
Questions Buyers Ask
Is the scale built into the grinder?
Yes. The Libra weighs the dose during grinding and stops at the programmed target.
Can I use a bottomless portafilter?
The adjustable fork accommodates many common portafilters, but fit depends on handle and basket geometry.
Why choose open box?
You receive a cleaned and tested grinder at a lower price, with the possibility of minor cosmetic evidence of prior handling.
Compare the condition value here with the new Eureka Mignon Libra 55.
Compact grind-by-weight espresso at an open-box price
The Eureka Mignon Libra 55 is designed for home baristas who want to fill a portafilter to a programmed weight without weighing a separate input dose. Its compact Mignon body, 55 mm flat burrs and stepless adjustment keep the workflow familiar, while the integrated scale reduces the dose variation that can occur when a timer is used alone.
Best practices for consistent dosing
- Adjust the fork so the portafilter sits securely and the basket remains centered below the chute.
- Brush loose grounds away from the support so they do not interfere with weighing.
- Do not rest a hand on the portafilter while the grinder is measuring the dose.
- After a grind change, evaluate shot time and beverage yield before changing the target dose.
Open-box Eureka Mignon Libra 55 FAQ
What was done before resale?
Espresso Outlet cleaned, inspected and tested the returned black grinder. Minor cosmetic marks may remain from handling, but the unit must pass a functional check before it is offered as open box.
Does this open-box grinder have the normal warranty?
Yes. Espresso Outlet provides the same warranty coverage on open-box and new home grinders unless the product listing explicitly notes an exception.
Is the Libra 55 a single-dose grinder?
No. It is a hopper-fed grind-by-weight grinder. It measures the output delivered into the portafilter, making it convenient when one main espresso coffee remains in the hopper.
How is it different from the Specialita?
The open-box Specialita uses timed dosing. The Libra adds an integrated weighing workflow for users who want the grinder to stop at a target weight.
Should I step up to the Libra 65 AP?
The Libra 65 AP offers a larger burr platform and broader all-purpose positioning. Review the new Libra 55 page or browse home grinders for more comparisons.