The Whirly 01S Portable Electric Grinder is Timemore’s latest entry into the compact grinder market. Unlike the brand’s popular manual lineup, the Whirly 01S is fully electric and battery-powered, designed for people who want the convenience of motor-driven grinding without relying on a wall outlet. At just 760 grams, it’s one of the lightest electric grinders available, but still aims to offer the precision and consistency home brewers expect from Timemore.
Features of the Whirly 01S Portable Electric Grinder
Portable Form Factor
At 760g, the Whirly 01S is lighter than many manual grinders and similar in size—small enough to fit in a backpack or carry-on. The compact size makes it appealing for travel or as a secondary grinder where space is limited.
Twist-Up Hopper
The grinder uses a swivel-style hopper that opens with a twist rather than a removable lid. This small design change makes loading beans more convenient and reduces the chances of misplacing parts during use.
42mm Steel Conical Burrs
The Whirly 01S uses a set of 42 mm steel conical burrs designed to handle both espresso and filter brewing. The burrs are sharp and consistent, though they lean slightly toward espresso performance, with filter brews sometimes producing more fines than dedicated flat burr grinders.
Catch Cup Size
The catch cup holds up to 45g of coffee, which is enough for most single brews and small batch brewing. Its shape and dimensions are designed to sit directly on a 58mm portafilter, which will be a plus for espresso users looking for less transfer mess.
What’s in the Box
The Whirly 01S packaging is minimal and comes with:
- The grinder
- a USB-C charging cable
- a cleaning brush
- a user manual
What I Love About the Whirly 01S Portable Electric Grinder
- Design & build. The Whirly 01S has a clean design that reflects Timemore’s usual attention to detail. The swivel hopper is intuitive, and the silicone base on the catch cup adds stability during grinding. The grinder feels solid for its weight, though not as premium as larger countertop models.
- Grind Adjustment. Adjustment is handled through a dial on the base of the grinder, offering 90 clicks in total. Each click moves the burrs 25 microns. It’s a familiar system for those who have used Timemore’s manual grinders, though the numbering scheme (using decimals like 1.7 for one full rotation plus 7 clicks) can take some time to get used to.
- Battery & motor. The 60W motor is relatively quiet and efficient. In testing, it took about 90 seconds to grind an espresso dose and around 30 seconds for a standard pour-over dose. A full charge supports roughly 20 espresso grinds or 35 pour-over grinds, which is respectable for the grinder’s size.
What Is Lacking in the Whirly 01S Portable Electric Grinder
- Burr Performance. The grinder uses 42mm steel conical burrs, which Timemore designed to cover both espresso and filter brewing. While they handle espresso well, pour-over brews can show a higher amount of fines compared to grinders optimized for filter coffee. This may result in slightly muddier cups with lighter roasts.
- Battery Limitations. The internal battery is convenient, but limited. For travel beyond a few days without charging, or for users grinding multiple doses daily, the capacity may feel restrictive.
- Learning Curve. The adjustment dial works well once understood, but the decimal-based rotation system isn’t immediately intuitive. For new users, dialing in can be confusing at first.
Recommended Grind Sizes for Different Brew Methods
Based on manufacturer guidance and practical use, these are suggested starting points:
| Brew Method | Dial Range Estimate | Clicks |
|---|---|---|
| Espresso | 0.1 – 0.7 | 3-21 |
| Moka Pot | 0.6 – 0.8 | 18-24 |
| Pour-Over | 1.7 – 2.1 | 51-63 |
| French Press | 2.3 – 2.7 | 69-81 |
Like all grinders, these ranges should be considered baselines. Results will vary depending on the bean and brew method.
Overall Thoughts
The Whirly 01S is a practical, travel-ready grinder that balances portability with functionality. It’s not designed to replace higher-end electric grinders at home, nor does it match the grind quality of some dedicated filter-focused burr sets. However, its lightweight design, user-friendly hopper, and straightforward performance make it a compelling option for those who value convenience.
Who Should Buy the Whirly 01S Portable Electric Grinder
The Whirly 01S is best suited for:
- Travelers who want an electric grinder without relying on outlets.
- Espresso drinkers who appreciate a portable grinder that fits a portafilter directly.
- Users looking for a compact secondary grinder at home or the office.
It may not be ideal for:
- Brewers focused primarily on light roast pour-over clarity.
- Those needing long battery life for extended use without charging.
- Users expecting the same refinement as larger, countertop electric grinders.
Conclusion
The Whirly 01S is a thoughtful addition to Timemore’s lineup, combining portability, ease of use, and solid grind performance in a small package. While it has some limitations, it succeeds in making high-quality grinding more accessible in places traditional grinders can’t reach. For many coffee enthusiasts, it will serve best as a reliable travel grinder or a compact, everyday option where space and convenience are priorities.
