In brief
The Orbit is a grinder from Acaia, a company better known for its scales. Acaia lists 64 mm flat steel burrs, stepless adjustment and a 200 W brushless motor whose speed you can set between 600 and 1500 RPM. It is designed for single-dosing, with a knocking chute and an automatic purge to cut retention.
Reviewers like the grinding. Kaffeemacher calls it "a very good single dosing grinder" and praises its flavor and shot repeatability. The one clear complaint is the grind-by-weight feature, which is the reason many people look at an Acaia grinder in the first place.
Independent reviews of the Orbit are fewer than for the big-name espresso grinders. Kaffeemacher gives the most measured detail here, and Prima Coffee's video overview supplies the rest, so read this as a summary of two sources plus the maker.
What it does well
- Kaffeemacher calls it a very good single-dosing grinder, praising flavor and shot repeatability
- Kaffeemacher measured retention of 0.7 g in total, 'excellent' for a hopper-fed grinder
- Stepless adjustment, an automatic purge and a knocking chute for single-dosing, per Acaia
- Prima Coffee notes a choice of 64 mm burr sets and plentiful aftermarket burrs
Where it falls short
- Kaffeemacher found grind-by-weight with an Acaia scale inaccurate because 0.7 to 1 g stays in the chute
- Kaffeemacher reports strong static and slow grinding: about 18.5 seconds for 18 g at 1000 RPM
- Kaffeemacher says permanent retention builds on the burr carrier and cleaning means loosening several screws
- Prima Coffee notes the plastic single-dose hopper holds only about 25 to 30 g
Specs
- Type
- Electric, Flat burrs
- Burrs
- 64 mm flat; Mazzer 33M or SSP Multi-Purpose / SSP Lab Sweet V3 options
- Adjustment
- Stepless
- Motor
- 200 W brushless DC, 600–1500 RPM adjustable
- Hopper
- Multi-purpose, single-dose or batch adapter
- Weight
- 6.13 kg
- Size
- 10.8 × 26.6 × 39.4 cm
- Warranty
- Two years in the US and EU, one year elsewhere (Acaia)
- Power
- Electric, Bluetooth 5.0
Where to start on the dial
Espresso 4.5Pour-over 7.6AeroPress 6.8Drip 8.9
Every method on the settings chart →On this page · 5 sections
What it does well
Flavor and consistency are the draw. Kaffeemacher measured a narrow main particle peak around 209 microns, which it says produced very good espresso and surprisingly good filter coffee. It found grounds reached only 32.6 degrees Celsius during grinding.
Retention is low. Kaffeemacher reports 0.2 to 0.3 g of temporary retention plus 0.4 g permanent, and calls the combined 0.7 g "excellent in relation to most hopper-fed grinders." Prima Coffee also highlights low retention, though it gives no figures. See grind retention for why this matters when you single-dose.
Control is simple. Kaffeemacher likes the one-button operation, automatic end-of-grind detection and the way stepless adjustment makes it easy to return to a previous setting. Prima Coffee notes a movable reference that marks the zero point and can be reset for new or worn burrs.
Burr choice is flexible. Acaia sells the Orbit with Mazzer 33M or SSP burr sets, and Prima Coffee says aftermarket 64 mm burrs are widely available. Acaia designed the Orbit with Weber Workshops, and says the EG-1's construction inspired it.
Where it falls short
Grind-by-weight is the weak spot. Kaffeemacher says 0.7 to 1 g stays in the chute, so to get 18 g the reviewer had to program 17.3 g, and it concludes that "a scale for the purpose of better precision becomes an illusion." Prima Coffee also says the feature is not fully useful with the short hopper.
It is slow and static-prone. Kaffeemacher reports about 18.5 seconds for 18 g at 1000 RPM, a strong static charge, and a recommendation to spray water if you do not buy Acaia's anti-static tool. It also reports that cleaning the permanent retention off the burr carrier requires loosening several screws.
Hopper and price are limits. Prima Coffee says the plastic single-dose hopper holds roughly 25 to 30 g, and the knocker sits behind the spout where it is hard to reach. Kaffeemacher lists the price as a con, and the finder entry shows what Acaia asks.
Who should buy it, and who shouldn't
Buy it if you single-dose, drink espresso and filter, and want a flat-burr grinder with low retention and stepless adjustment. The app presets and RPM control suit people who like to experiment.
Think twice if you are mostly buying it for scale integration, or if you want a quick grinder. A manual weigh-in works fine and avoids the problem Kaffeemacher found.
How it compares
The Weber EG-1 is the single-dose flat-burr grinder Acaia credits as inspiration. The DF64 Gen 2 is another single-dose flat-burr route. The Niche Zero is a popular single-dose conical alternative. See our dial-in guide if you move from one to another.
Owning it
Acaia gives a two-year warranty in the US and EU and one year elsewhere. It recommends a duty cycle of 60 seconds of running followed by 30 seconds of rest. Acaia's page lists several colors and burr options, with a few combinations shown as sold out at the time it was read, so check availability for the combination you want.
Also worth a look
Sources
By Jeff · Checked 2026-10-22