Tuni G3 Flat Burr Coffee Grinder Review
A black electric coffee grinder from Tuni with a 64mm stainless steel flat burr, 100 grinding settings and dual bean hoppers.
| Brand | Tuni |
|---|---|
| Model | G3 |
| Color | Black |
| Burr type | 64mm stainless steel flat burr |
| Grinding settings | 100, stepless adjustment |
| Timer precision | 0.5 second increments |
| Best for | Home espresso and pour over brewers wanting a dual hopper grinder with precise, timed single and double shot dosing |
Product Overview
Tuni builds the G3 around a 64mm stainless steel flat burr, which the brand states provides a wider grinding surface for faster, more uniform bean cutting while minimizing heat buildup that can affect flavor. The grinder targets both espresso and filter style brewing through 100 adjustable grinding settings on a stepless adjustment ring.
An LED touchscreen controls grind timing down to 0.5 second increments across single shot, double shot and continuous modes, letting users dial in a repeatable dose rather than eyeballing grind time.
Score Breakdown
This verdict is based on the manufacturer's stated specifications, the current Amazon listing and its product images, the confirmed materials and design, real buyer ratings, and our research into the product category. Scores are consistent editorial judgments, not laboratory measurements, and we did not receive a paid sample.
Key Features
Stainless steel burr built for fast, uniform grinding with minimized heat buildup.
A stepless adjustment ring covers espresso through pour over grind sizes.
Single shot, double shot and continuous modes with 0.5 second precision.
Reduces static-induced grounds scatter, per the listing.
A 250g bulk hopper and a 50g single-dose hopper that can be swapped.
Design and Build Quality
Tuni finishes the G3 in black and lists the unit at 7.3 pounds. The listing's item dimensions field states a comparatively compact 6.14 by 3.86 by 2.32 inches, a figure that reads small next to the stated weight and the grinder's dual hopper, flat burr design, so it is worth treating as reported rather than fully reconciled.
The grinder includes a patented anti-static system that Tuni states reduces static-induced grounds scatter, and ships with a portafilter holder compatible with 51 to 58mm portafilters, a 100g dosing cup, a dosing ring, a hopper bellow blower and 2 soft brushes.
Performance in Everyday Use
The dual hopper design is the main workflow feature: Tuni states the 250g (8.8oz) large hopper suits high-frequency, bulk grinding while the 50g (1.7oz) small hopper is built for single-dose grinding or specialty beans, with the brand describing a switch between the two for different daily brewing needs. The 0.5 second timer precision on the touchscreen is meant to make single and double shot doses repeatable.
The 64mm flat burr and 100-setting stepless ring are Tuni's stated mechanism for grind consistency across brew methods from espresso to pour over. These are Tuni's own published burr size, setting count, hopper capacity and timer precision figures rather than independent grind consistency testing of this specific unit.
How It Performs: The Evidence
| Decision factor | What we found | Evidence and measurement | Score | Why it matters |
|---|---|---|---|---|
| Burr size | 64mm stainless steel flat burr | Listing states a 64mm stainless steel flat burr with a wider grinding surface for uniform bean cutting | 8.3 | A named burr size shows how much grinding surface is available for consistency |
| Grind settings | 100 settings, stepless ring | Listing states 100 adjustable grinding settings with a stepless adjustment ring | 8.1 | A stated setting count shows how finely the grind size can be dialed in |
| Timer precision | 0.5 second increments | Listing states grind times can be customized with 0.5-second time increments precision | 8.2 | A named timer precision shows how repeatable dosing can be between grinds |
| Hopper capacities | 250g large, 50g small | Listing states a 250g / 8.8oz large hopper and a 50g / 1.7oz small hopper | 8.0 | Confirmed hopper sizes show how the grinder handles both bulk and single-dose use |
| Weight and dimensions | 7.3 lb, 6.14 x 3.86 x 2.32 in | Listing's item dimensions field states a weight of 7.3 pounds and dimensions of 6.1417322772 by 3.8582677126 by 2.3228346433 inches | 6.8 | Reporting both figures flags that the stated footprint reads small against the stated weight |
| Warranty | 1 year with lifetime tech support | Listing states a 1 Year Warranty & Lifetime Tech Support | 7.9 | A named warranty and support term shows the brand's own stated backing for the grinder |
Who Should Buy It
- Home espresso brewers wanting precise, timed dosing
- Pour over and drip brewers wanting a wide grind range
- Buyers wanting to switch between bulk and single-dose grinding
- Anyone wanting a touchscreen rather than dial-based grind control
- Buyers prioritizing an anti-static grounds design
- Anyone wanting a simple manual grinder rather than a touchscreen, timer-based electric model
- The listing's 6.14 x 3.86 x 2.32 inch dimensions seem small relative to the stated 7.3 pound weight and dual hopper design
- Only available in Black on this listing
- The listing states 100 grinding settings without naming the actual micron or particle size range those settings span
- The included portafilter holder is stated to fit only 51 to 58mm portafilters, which may exclude some larger or smaller baskets
Full Specifications
How It Compares
| Feature | Tuni | Typical option | Higher-tier option |
|---|---|---|---|
| Burr type | 64mm stainless steel flat burr | Smaller diameter flat or conical burr | Comparable large flat burr |
| Grind adjustment | 100 settings, stepless ring | Fewer, stepped grind settings | Similar wide grind range |
| Dosing control | Touchscreen timer, 0.5 second precision | Manual timing or basic dial control | Comparable precision timer |
| Hopper design | Dual hoppers, 250g and 50g | Single fixed hopper only | Comparable dual hopper design |
| Static control | Patented anti-static system | No stated anti-static feature | Similar anti-static system |
Alternatives Worth a Look
The Tuni G3 Flat Burr Coffee Grinder combines a 64mm stainless steel burr, 100 grinding settings, a 0.5 second precision touchscreen timer, an anti-static system and dual bean hoppers in a 7.3 pound black unit. It suits brewers wanting precise, repeatable dosing across espresso and filter methods, with the caution that the listing's compact stated dimensions sit oddly against the unit's weight and dual hopper build.
Frequently Asked Questions
What size is the burr on this grinder?
A 64mm stainless steel flat burr, per the listing.
How many grind settings are available?
100 settings on a stepless adjustment ring, per the listing.
Can it time single and double shots?
Yes, the touchscreen supports single shot, double shot and continuous modes with 0.5 second precision.
How many bean hoppers does it have?
Two, a 250g large hopper and a 50g small hopper, per the listing.
How much does the grinder weigh?
7.3 pounds, per the listing.
What warranty is included?
A 1 year warranty with lifetime tech support, per the listing.
This review is based on Tuni's stated burr size, grinding settings, timer precision, anti-static design, hopper capacities, dimensions, weight and included accessories for this grinder as listed. It is editorial analysis of the specifications and features as described, not independent grind size or extraction testing of this specific unit.