THE GRINDER FILEMignon Libra

Mignon Libra

Name: Eureka Mignon Libra
Brand: Eureka

A load cell in the portafilter support lets the Libra stop at a target dose weight. It combines that measured workflow with 55 mm burrs and the Mignon’s stepless adjustment.

US catalog · Mignon Libra · 120 V

Seattle Coffee GearSpecialty retailer

Finish at Seattle Coffee Gear

$799.00

New · Black · 120 V

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In stock when checked Nov 9, 12:15 AM UTC. Affiliate link

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Specification research, not a hands-on review. Sources checked November 6, 2026.

Burr diameter: 55 mm
Grind adjustment: Stepless
Dosing system: Grind by weight
US supply voltage: 120 V

Living with the Mignon Libra

Your coffee routine

Dosing: Grind by weight.

Adjustment: Stepless.

On your counter

Width 127 mm (5.0 in)
Depth 190.5 mm (7.5 in)
Height 431.8 mm (17.0 in)

Converted from the retailer’s stated width.

Converted from the retailer's stated depth using 25.4 mm per inch.

Converted from the retailer's stated height using 25.4 mm per inch.

Allow extra room for access, refilling and cleaning. Published dimensions do not include installation clearance.

Daily setup

Power supply: 120 V.

Plan this setup

Follow the manufacturer’s manual for water, cleaning and maintenance instructions.

Specifications

Eureka Mignon Libra specifications with source links
Width	127 mmSource ↗Converted from the retailer’s stated width.
Height	431.8 mmSource ↗Converted from the retailer's stated height using 25.4 mm per inch.
Depth	190.5 mmSource ↗Converted from the retailer's stated depth using 25.4 mm per inch.
Burr diameter	55 mmSource ↗
Dosing system	Grind by weightSource ↗
US supply voltage	120 VSource ↗
Grind adjustment	SteplessSource ↗

Published source specifications. Unknown values stay unknown.

The buying decision

Is the Mignon Libra right for your setup?

Our interpretation of the documented features. Performance, taste and long-term reliability have not been independently tested.

Choose the dosing routine

Mignon Libra uses grind by weight. This is worth considering when you want the grinder to manage grounds mass during a repeated hopper-fed routine. Check the supported cup or portafilter arrangement; the grinder’s dose measurement does not replace measuring espresso yield.

Read the adjustment, not just the burr size

The documented adjustment is Stepless. The burr diameter is 55 mm. Use those details to compare hardware and how you will record a setting. They do not establish a flavor ranking, measured grind speed or noise level. If you change brew methods, allow time to check the espresso recipe when returning.

Plan access and the handoff

Check the assembled height with the selected hopper and room to remove its lid. Confirm whether your portafilter is supported directly or whether you will transfer grounds from a cup. Read the burr-access and cleaning instructions before choosing a position beneath a cabinet; published body dimensions are not a service-clearance specification.

Read the model comparison

Eureka Mignon Specialita vs Libra →A timer or a target weight: compare the dosing decision behind two 55 mm Mignon grinders.

Understand the Eureka lineup →Compare grinder workflows →Check your counter space →Inspect the supporting sources ↓

Compare with

Eureka / Silenzio 55

Mignon Silenzio 55

Dosing system: Timed dosing

Eureka / Specialita

Mignon Specialita

Dosing system: Touchscreen timed dosing

Sources

This profile cites US manufacturer or retailer documentation. Source-listed offers keep their merchant SKU and finish; matching prices do not establish identical hardware revisions across stores.

Eureka Mignon Libra · US product page ↗
Eureka Mignon Libra Espresso Grinder · Seattle Coffee Gear ↗
Technical specifications and product description · Checked November 6, 2026

Product photography from the linked source; the pictured finish is noted above. Image source ↗. A manufacturer SKU identifies a configuration, not a confirmed hardware revision.