Eureka Mignon Libra 55 Digital Grinder – Black

Overview

The Eureka Mignon Libra 55 Digital Grinder in Matte Black combines professional grind-by-weight technology with a clean, understated design that complements modern espresso setups. Built for home baristas who demand consistency without unnecessary complexity, the Libra automatically weighs every dose as it grinds, producing repeatable espresso with virtually no guesswork.

Powered by Eureka's patented Instant Grind Weighing (IGW) technology, the Libra continuously measures coffee in real time and stops automatically once the programmed target weight is reached. The result is highly accurate dosing, reduced coffee waste, and a faster workflow that removes one of the biggest variables in espresso preparation.

Featuring 55mm hardened steel flat burrs, patented stepless micrometric grind adjustment, Silent Technology, and an intuitive touch display, the Mignon Libra combines compact dimensions with commercial-inspired precision for serious espresso enthusiasts.

Its matte black finish delivers a subtle, contemporary appearance that integrates effortlessly into dedicated home coffee stations while keeping the focus on performance.

Who It's For

• Home baristas seeking highly accurate espresso dosing.
• Users upgrading from timed espresso grinders.
• Coffee enthusiasts who value consistency and repeatability.
• Owners of premium home espresso machines.
• Users wanting grind-by-weight technology in a compact grinder.
• Espresso lovers looking to reduce coffee waste.

What's in the Box

Eureka Mignon Libra 55 Grinder - Black | Libra Steel Dosing Funnel | Adjustable Hands-Free Portafilter Fork | 300g Bean Hopper with Shut-Off Gate | Bench Testing, Calibration & Programming

Patented Grind-by-Weight Precision

The Mignon Libra replaces traditional timer-based grinding with Eureka's patented Instant Grind Weighing Technology. During every grind, an integrated weighing system measures the coffee entering the portafilter and automatically stops once the programmed dose has been reached.

Because dosing is based on weight rather than grinding time, changes in bean age, roast level, or grind setting have far less impact on consistency. This allows users to spend less time correcting doses and more time dialing in espresso.

• Patented Instant Grind Weighing (IGW)
• Real-Time Dose Measurement
• Automatic Weight-Based Stop
• Approximately ±0.2g Accuracy

Engineered for Consistent Espresso

The Libra's 55mm hardened steel flat burrs provide excellent grind consistency while maintaining efficient grinding speeds for daily espresso preparation. Eureka's patented stepless micrometric adjustment allows virtually unlimited grind refinement, making it easy to fine-tune extraction with extremely small adjustments.

Its bottom-burr adjustment system preserves your grind calibration during cleaning and burr replacement, eliminating the need to recalibrate after routine maintenance.

• 55mm Hardened Steel Flat Burrs
• Stepless Micrometric Adjustment
• Bottom Burr Adjustment System
• Excellent Espresso Particle Uniformity

Designed Around Everyday Workflow

The intuitive touch display allows users to program two weight-based doses, activate continuous grinding, switch between single and double doses during operation, and pause grinding whenever needed. Factory calibration means the weighing system is ready to use immediately without complicated setup.

The adjustable hands-free fork accommodates a wide variety of portafilters, while the included Libra dosing funnel uses powerful magnets to remain securely attached during larger-dose grinding.

• Touch Display Controls
• Two Programmable Weight Doses
• Continuous Grinding Mode
• Magnetic Libra Dosing Funnel Included

Quiet Performance with Minimal Waste

Eureka's Silent Technology significantly reduces grinding noise, making the Libra well suited to kitchens and shared living spaces. The ACE (Anti-Clumps & Electrostaticity) System minimizes clumping and static for cleaner dosing, while the integrated anti-vibration weighing system improves accuracy by maintaining stable measurements throughout the grinding cycle.

Combined with automatic grind interruption when the portafilter is removed, these technologies help reduce wasted coffee while keeping your workspace cleaner.

• Silent Technology
• ACE Anti-Clump System
• Anti-Vibration Weighing System
• Automatic Stop When Portafilter Is Removed

What Makes It Special?

• Patented Instant Grind Weighing: Measures coffee during grinding for true weight-based dosing.
• Exceptional Dose Accuracy: Approximately ±0.2g precision helps produce repeatable espresso shots.
• 55mm Hardened Steel Burrs: Deliver fast, consistent espresso grinding with excellent particle distribution.
• Stepless Micrometric Adjustment: Infinite grind adjustment for precise espresso dialing-in.
• Touch Display: Easy programming of two preset doses plus continuous grinding mode.
• Silent Technology: Reduces grinding noise for a quieter coffee experience.
• ACE System: Minimizes static and clumping for cleaner grounds distribution.
• Hands-Free Adjustable Fork: Fits virtually any portafilter without additional tools.
• Magnetic Dosing Funnel: Improves stability and minimizes coffee waste during larger doses.
• Compact Matte Black Design: Professional performance in a footprint suited to home espresso stations.

Specifications

• Brand: Eureka
• Model: Mignon Libra 55
• Finish: Matte Black
• Grinder Type: Grind-by-Weight Espresso Grinder
• Burr Type: Flat Hardened Steel
• Burr Diameter: 55 mm
• Adjustment System: Patented Stepless Micrometric
• Dosing System: Instant Grind Weighing (IGW)
• Weighing Accuracy: Approximately ±0.2 g
• Programmable Doses: 2 + Continuous Mode
• Display: Touch Display
• Portafilter Holder: Adjustable Hands-Free Fork
• Bean Hopper Capacity: 300 g
• Grind Productivity: 1.4–1.8 g/s (Espresso)
• Motor: Direct Drive
• Motor Speed: 1350 RPM
• Motor Power: 310 W
• ACE System: Yes
• Silent Technology: Yes
• Voltage: 110 V
• Current: 3 A
• Dimensions (H × W × D): 17 × 4.75 × 7.5 in (430 × 124 × 192 mm)
• Weight: 14.5 lbs / 6.5 kg

Warranty

• Parts: 1 Year Warranty
• Labour: 1 Year Warranty

Perfect For

• Espresso-focused home coffee setups.
• Users upgrading from timed grinders.
• Prosumer espresso machine owners.
• Daily single and double-shot preparation.
• Coffee enthusiasts pursuing greater consistency.
• Anyone seeking weight-based espresso grinding.

Why Choose the Eureka Mignon Libra 55?

The Mignon Libra brings commercial-style precision to the home by combining Eureka's patented grind-by-weight technology with proven burr performance, quiet operation, and intuitive controls. It simplifies espresso preparation by removing dosing inconsistencies while maintaining the flexibility and fine adjustment serious home baristas expect.

For anyone looking to improve espresso consistency without increasing workflow complexity, the Libra offers an elegant balance of precision, speed, and everyday usability.