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Doing coffee grinding activities with just relying on hand motorics is commonly done as I always carry one of the manual grinder when I’m traveling out of town. It takes a little effort to turn the manual grinder, but still this tool needs to be owned by anyone, especially the hobby of traveling.

The popularity and reliability of some of the most popular grinders like Hario Ceramic Slim, Zasenhauss, Porlex, or Lido3 are undoubtedly. Moreover, all brands use conical burr for more consistent grinding results.

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ROK grinder is not portable or not practical to carry anywhere because its shape is much larger. Designed and manufactured to be a companion to the manual espresso maker, but of course it can be used for other brewing needs.

Beautiful design with shiny material, with a slightly higher size than the Lido3. The lever is comfortably held and can be moved both clockwise and counter clockwise and can be used for the left-handed. At the bottom there is an anti-slip for the ROK position to stay in place while in use. But there is no lid on the part where the maximum coffee beans can only contain as much as 50 grams.

For the smoother arrangement of what coffee powder is required, there is a wheel adjustment in the form of a black iron circle at the bottom with numbers 1, 2, 3, to a maximum of 12, the way it works is rotated as necessary.

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Using a conical burr with two bearings at the top and bottom, as adopted by Lido3 so that the burr position will not change. Its operation is simply by rotating the handle clockwise and the ROK has provided a special container at the bottom.

Weighing less than 3 kilograms so easy to move.

Using ROK Grinder. I immediately want to try it for espresso and turn the controller to the end. But before, for calibration purposes, just turn the wheel adjustment while holding the lever so that it does not go spin until the number 1 fits below the point. This is the recommended beginning and I still pair the “washer” so that the ROK can function as a grinder with a “step” or spin free setting.

One of the uniqueness of ROK is the two function settings (grind adjustment) both step and stepless are integrated in one tool. An advantage that is almost never found on the grinder I’ve tried. The so-called “washer” tool consists of a plastic and a circular iron that serves to hold the wheel adjustment to rotate freely without any friction from the marking rows.

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Fewer Rings. I just loaded 17 grams and started turning the lever as much as 54 times for a set of smoothness for an espresso. As a comparison material, both Lido3 and Porlex Mini need about 120-150 rounds for the same amount of coffee. So for business speed, silence, ROK is superior in addition to not need to exert excessive energy.

As always, the result of grind with conical burr can always be relied upon with particles that are quite evenly visible as the result of the macro photo above. So there is no difficulty for ROK in grinding with espresso settings.

Some notes after using ROK.

  • However, because it is not equipped with a cover, coffee bean flakes often jump out even though the amount is not much, especially when I’m excited to twist the crank. It would be nice if the ROK is re-modified by completing the cover on the hopper section so that the coffee beans do not often blur.
  • In addition, the problem where static electricity makes coffee powder is attached primarily at the bottom (wheel adjustment) and this is what happens to some manual grinder included in ROK.

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