TIMEMORE WHIRLY01S Portable Electric Coffee Grinder – 42mm Burrs

If you want freshly ground coffee without hand-cranking or giving up much counter space, the TIMEMORE WHIRLY01S is worth a look. This portable electric coffee grinder combines a rechargeable battery, 42mm stainless steel burrs, and adjustable grind settings in a compact upright body.

I like the idea of keeping the routine simple: weigh the beans for your brew, choose your grind setting, and let the motor do the work. At approximately 190mm tall and 72mm across, the WHIRLY01S is a practical option for a smaller coffee station or a setup you move between rooms.

42mm S2C burrs, explained

The WHIRLY01S uses TIMEMORE’s S2C-042-EI grinding core with 42mm eight-star burrs made from SUS420 stainless steel. S2C means SpikeToCut, a design that pierces the beans before cutting them into smaller particles. The burrs do the grinding rather than a spinning blade chopping beans at random.

What matters in your cup is finding a grind that works with your coffee and brewer. Fresh beans, a consistent dose, and a repeatable recipe still do more for your morning than chasing a feature name.

Choose the grind for your brewer

The adjustment system has 30 divisions per rotation, with a stated adjustment increment of 0.025mm per division. That measurement describes the mechanism’s adjustment, not the size of every coffee particle.

The grind range covers pour-over, moka pot, French press, and traditional espresso preparation. For espresso, this model is better suited to a traditional espresso routine than demanding single-origin espresso dialing-in. I would choose it primarily for its compact, cordless convenience rather than treat it as a replacement for every dedicated espresso grinder.

Start with a setting suited to your brewing method and make small changes. Keep your coffee dose and water amount steady so you can tell what each adjustment does.

A straightforward daily routine

1. Weigh your roasted coffee beans, keeping within the approximately 45g hopper capacity.
2. Open the rotating bean-container lid, add your beans, and close it.
3. Select the grind setting for your brewer, following the operating instructions.
4. Press the start control. The grinder stops automatically after grinding.
5. Transfer the grounds from the catch cup and brew while the aroma is fresh.

The grounds container holds approximately 45g and is designed to align with a 58mm portafilter for transferring espresso grounds. That is a transfer feature, not a requirement to own an espresso machine to use this grinder.

Details at a glance

• Brand and model: TIMEMORE WHIRLY01S.
• Burrs: 42mm S2C-042-EI, eight-star SUS420 stainless steel.
• Capacity: Approximately 45g each for beans and grounds.
• Battery: Rechargeable 1000mAh lithium battery.
• Charging: USB-C, using a 5V/2A power adapter. Do not use fast charging.
• Rated power: 25W.
• Size: Approximately 190 × 72 × 72mm.
• Weight: Approximately 760g.
• Materials: Aluminum alloy, ABS, and stainless steel.
• Color: Black.

Care without the fuss

Use this grinder only for roasted coffee beans. Switch it off before cleaning and brush away dry grounds; do not rinse or immerse it in water. Keep fingers clear of the sharp burr edges, keep it out of children’s reach, and store it somewhere dry. Follow the operating instructions rather than taking apart the burr assembly yourself.

I would choose the WHIRLY01S if you want electric grinding in a compact format and enjoy brewing a dose at a time. Pick a familiar coffee, start with your usual recipe, and give yourself a few brews to find the setting you like.