Overview
The ROK Coffee Grinder pairs naturally with the ROK manual espresso maker, featuring 48mm conical burrs and stepless adjustment optimized for espresso grinding. The unique tabletop design with dual handles provides ergonomic grinding leverage, making espresso-fine grinding easier than single-handle designs. The 48mm burrs are large for a hand grinder, providing fast grinding with good uniformity. The ROK grinder is a compelling companion for manual espresso setups, offering quality espresso grinding in an ergonomic format that reduces grinding fatigue.
The ROK Coffee Grinder features a 48mm conical burr set, crafted from steel. Grind retention is approximately 0.1g — virtually zero retention, making it excellent for single dosing.
At $149, the ROK Coffee Grinder is aimed at home baristas seeking a solid grinder without a premium price tag. Key workflow features include single-dose design (no hopper needed) and stepless grind adjustment for infinite precision. As a hand grinder, it's completely silent, portable, and gives you a meditative morning ritual.
The ROK Coffee Grinder is weighing 1.0 kg, manufactured in United Kingdom. Its footprint measures 100 x 100 x 220 mm (W×D×H).
Pros & Cons
Pros
- Capable 48mm burr set provides good grind quality for espresso
- Designed for single dosing — weigh your beans in, get precisely that amount out with minimal waste
- Stepless grind adjustment allows infinite precision for dialing in any coffee to perfection
- Near-zero retention (0.1g) means almost no stale grounds contaminating your next shot
- Completely silent operation — perfect for early mornings without waking the household
- Fully portable with no electricity required — great for travel and camping
Cons
- Manual grinding requires physical effort — espresso-fine takes 30-60 seconds of turning
- Not practical for making multiple drinks back-to-back for guests
Full Specifications
| Brand | ROK |
|---|---|
| Model | ROK Coffee Grinder |
| Category | Hand Grinder |
| Country of Origin | United Kingdom |
| Year Introduced | 2019 |
| Burr Size | 48 mm |
| Burr Material | Steel |
| Burr Type | 48mm conical |
| Retention | 0.1 g |
| Single Dose | Yes |
| Stepless Adjustment | Yes |
| Hopper Capacity | 35 g |
| Dimensions (W x D x H) | 100 x 100 x 220 mm |
| Weight | 1.0 kg (2.2 lbs) |
| MSRP | $149 |
Our Verdict
The ROK Coffee Grinder is a hand grinder, which means it trades speed and convenience for portability, silence, and often better value per dollar of grind quality. In the $100–$250 range, hand grinders can match or exceed electric grinders costing twice as much in grind quality. This is the sweet spot for serious home baristas who don't mind the manual effort. If your daily routine involves 1-2 drinks and you enjoy a mindful morning ritual, this is an excellent option. For larger households or back-to-back drinks, consider an electric alternative.
Frequently Asked Questions
Can the ROK Coffee Grinder grind fine enough for espresso?
Yes, the ROK Coffee Grinder is capable of grinding fine enough for espresso. Its stepless adjustment allows you to dial in precisely for any coffee.
Is the ROK Coffee Grinder good for single dosing?
Yes, the ROK Coffee Grinder is designed for single dosing. With only 0.1g of retention, virtually all the coffee you put in comes out ground. Weigh your beans before grinding for the most consistent results.
How long does it take to grind espresso with the ROK Coffee Grinder?
Grinding a single dose (18g) for espresso typically takes 30-60 seconds with the ROK Coffee Grinder, depending on the bean and your desired fineness. It requires moderate physical effort. Most users find it a pleasant morning ritual, but if you make more than 2-3 drinks daily, consider an electric grinder.
How do I maintain the ROK Coffee Grinder?
Clean out retained grounds after each use with a brush or bellows. Deep clean the burrs every 2-4 weeks by removing them and brushing away oil buildup. Hand grinders are easy to disassemble for cleaning. Never wash burrs with water.