HEY CAFE Jack Grinder 64mm — Allround On-Demand Grinder

The HEY CAFE Jack is engineered as a versatile workhorse — a true all-round grinder that comfortably spans espresso through coarser manual brew methods while remaining compact enough for tight counters. At its core are 64 mm hardened steel flat burrs manufactured to precise tolerances to give an even grind profile and stable extraction. Those large burrs mean the Jack can grind quickly without overheating, preserving aroma and volatile oils for a cleaner cup.

Precision and repeatability are front and centre: the Jack uses a stepless micrometric adjustment mechanism so you can micro-tune particle size for different recipes. A usable grind range for espresso (≈1.7–2.2 g/s) up to coarser settings for immersion and filter (up to ~3.0 g/s). Low retention design and a thoughtfully machined grind chamber minimise waste and speed up changeovers between recipes — ideal for mixed-menu service or recipe development.

Mechanically the unit balances power and thermal control: a ~200 W motor drives the burrs while a cast-aluminium grinding chamber with cooling ribs reduces heat transfer to the coffee. The result is steady throughput, reliable dosing and a machine that handles regular service without quickly fatiguing. The Jack’s footprint and weight make it stable on the bench but small enough for home counters — a practical choice for operators who want pro-level results without a large backbar grinder.

Beyond specs, the Jack is designed with barista workflow in mind. It offers removable grounds trays, accessible spout/flapper access for fast cleaning, and adjustable portafilter support for hands-free dosing. A modest hopper (≈250 g typical) supports both single-dose work and steady small-batch service while keeping the machine compact. These features make the Jack suitable for specialty cafés, roaster sample stations, and home users who demand consistent, repeatable grinding across different brew methods.