Availability: Choose the finish above to see current availability. Inventory can change quickly. Eureka Mignon Libra 55mm Grind-by-Weight Espresso Grinder The Eureka Mignon Libra 55 combines a compact Mignon body with an integrated scale that grinds directly into the portafilter and stops at the programmed gram target. Its 55mm flat hardened-steel burrs, touchscreen, stepless adjustment, ACE system and Silent Technology create a fast, repeatable espresso workflow without a separate dosing scale. Think of the Libra 55 as the grind-by-weight counterpart to the Specialita 55. Both use 55mm burrs, but the Specialita stops by time while the Libra measures the grounds. The Libra 65 AP adds larger all-purpose burrs and a more trackable adjustment dial. Why Choose Eureka Mignon Libra 55? Instant Grind Weighing: Stops at a programmed gram target rather than elapsed time. 55mm flat hardened-steel burrs: Espresso-focused consistency and body. Touchscreen controls: Program two weight targets or use continuous mode. Approximate ±0.2g consistency: Designed for repeatable hands-free dosing under proper setup. Stepless adjustment: Fine control for espresso dialing. Silent Technology: Reduces vibration and operating noise. ACE system: Helps control clumps and static. Who Is It Best For? Choose the Libra 55 if you make espresso from one primary hopper coffee and want the grinder to weigh each dose automatically. It is less ideal for single dosing, changing beans every shot, or moving frequently between espresso and filter. Choose the Zero 55 for single dosing or the Libra 65 AP for broader brew use. Eureka Libra 55 vs Libra 65 AP vs Specialita The Libra 55 is the compact espresso-focused grind-by-weight model. The Libra 65 AP adds larger all-purpose burrs and easier setting tracking; Specialita uses timed dosing instead of a scale. Model Burrs Dosing workflow Best for Main reason to choose it Eureka Mignon Silenzio 50 50mm flat steel Manual or analog timed dosing Quiet, straightforward home espresso The simplest and most affordable hopper-fed Mignon in this collection Eureka Mignon Zero 55 55mm flat steel Single dose with bellows and cup Changing coffees and weighing each dose Purpose-built low-retention single-dose workflow Eureka Mignon Specialita 55 55mm flat steel Two timed doses + continuous Daily hopper-fed espresso Touchscreen convenience and repeatable timed dosing Eureka Mignon Libra 55 55mm flat steel Grind by weight Hands-free espresso dosing Stops at a programmed gram target rather than time Eureka Mignon Libra 65 AP 65mm flat steel, all-purpose geometry Grind by weight Espresso and filter from one grinder Larger burrs, built-in scale and easier setting changes Eureka Atom 75 75mm flat steel Electronic timed dosing High-volume espresso Faster commercial-style output without grind-by-weight Eureka Atom W 75 75mm flat steel Grind by weight High-volume, weight-based espresso Atom speed plus an integrated weighing system Libra 55 vs Libra 65 AP The Libra 65 AP uses 65mm all-purpose burrs, a 0–20 King-Size dial and revolution counter for easier movement between brew methods. The Libra 55 is smaller, espresso-focused and the better value when filter grinding is not a priority. Libra 55 vs Specialita 55 The burr size is similar, but dosing is different: Libra weighs grounds, while Specialita estimates dose from grind time. Libra is more adaptive as coffee density changes; Specialita costs less and has a simpler fork. How Grind-by-Weight Dosing Works Set a target weight on the touchscreen, place a compatible portafilter securely on the fork, and start grinding. The integrated system measures grounds during dispensing and stops at the target. Correct fork height, a stable portafilter and the appropriate dosing funnel are important for accuracy. Stepless Micrometric Grind Adjustment The fine-threaded dial is optimized for espresso corrections. Like other classic Mignons, it is excellent within a narrow range but less convenient for large dail