Geimori GU64 Single Dose Espresso Grinder - 64mm Flat Burr, Stepless

Flat burr performance at a price that doesn't require a second mortgage. The GU64 is a single-dose grinder built around 64mm flat burrs and a 150W BLDC motor: quiet, torque-rich, and consistent from shot to shot.

Why 64mm flat burrs matter

Flat burrs produce a tighter, more uniform particle size than conical burrs, which is what gives espresso its clarity and makes a shot repeatable instead of a coin flip. 64mm is the size most people land on: big enough to grind fast and stay cool, small enough that it isn't commercial overkill on your counter.

What single dosing means

You weigh your beans per shot and grind them all, rather than keeping a hopper full. Zero retention means what you put in is what you get out, so no stale grounds from yesterday sneak into today's cup, and you can switch beans whenever you like without purging half a bag.

Dialing it in

Stepless adjustment means infinite settings with no clicks or detents, so you can make changes smaller than a step-based grinder allows. That's the difference between a shot running 27 seconds and one running 31. The 800 to 1200 RPM range lets you slow things down for espresso and speed up for filter.

Choose your burrs before you order

• Multi-purpose flat burrs if you brew both espresso and pour-over. The right pick for most people.
• Filter flat burrs if you're mostly on pour-over, drip, or cold brew and want maximum clarity and sweetness in coarser grinds.

Specs

• Burrs: 64mm flat, multi-purpose or filter-specific
• Motor: 150W BLDC, 800 to 1200 RPM adjustable
• Adjustment: stepless, infinite settings
• Retention: near zero, with pre-breaker and anti-scatter
• Colors: Black or White
• Plugs: US, UK, EU, AU, JP
• 2-year warranty, 30-day returns

If you're stepping up from a hand grinder or an all-in-one machine's built-in burrs, this is the jump where espresso stops being luck and starts being a recipe.