Hario Coffee Mill Slim Grinder – Mini [REVIEW] – The Coffee Barrister

Hario Coffee Mill Slim Grinder – Mini [REVIEW]

Hario Coffee Mill Slim Grinder Review

Compact Design

Great for travel

Adjustable Grind Settings

Produces uniform grind from fine to coarse


Probably the most affordable in the market

If you are looking for a quality grinder for the road, then you might want to consider the Hario Coffee Mill Slim Grinder. It’s simple to use and produces high quality, uniform grind ranging from Espresso to Pour Over. The manual coffee grinder features a small plastic container that catches the grind at the bottom and a durable grinding unit at the top. The hand coffee grinder is small enough to tuck away in a briefcase or suitcase for easy travel, the Hario Mini truly lives up to its name. For those looking for an economic ceramic burr grinder, and don’t mind the manual labour in making their coffee, the Hario Coffee Mill Slim Grinder is the way to go.

The HARIO Mini Mill's Specification 

  • Dimension: 7.3' x 4.5' x 3.2'
  • Weight: 11.2oz
  • Burr: Conical ceramic burrs
  • Capacity: 24g
  • Time: ~75 sec/shot
  • Grind Settings: 25

What We Like

  • Uniform Grind Across All Settings
  • Compact Design, Great For Travel
  • Easy To Use And Clean
  • Great Value For Money

What We Don't Like

  • Small Capacity
  • Relatively Longer Preparation Time
  • Less Even Grinds At Coarser Settings
  • Lower Quality Crank Handle

This Hario Mini Grinder Is Best For...

After using the Hario Mini Mill, I think it’s best suited for home use and possibly frequent travellers too. The coffee grinder is small so it won’t take up too much space at home and can be easily stored away for travel. The grind quality is high, this means that experienced coffee-lovers will enjoy this item too. The capacity is relatively small, it can store up to 24g, which allows you to prepare 1 – 2 cups of fresh coffee max.

Video Review

Features of the Hario Slim Coffee Mill

Design & Appearance


This Hario coffee mill is simple and functional. The Hario grinder is all-plastic, with a transparent grind container that marks the quantity for 1 – 2 cups of coffee. The shape is pleasing and modern. I didn’t really like the handle though, the quality doesn’t seem that high. I’ve looked around and it seems like other users share this feeling, especially when their handle actually flew off after using it for a while.


The Coffee Mill Mini uses ceramic burrs. Ceramic burrs are considered to be better than stainless steel burrs because heat generated is kept to a minimum when grinding. Operating this grinder is quite smooth, especially if you have some biceps.

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The Hario coffee grinder can store up to 24g of coffee beans, which can be stored away in the grind container. With this, you can grind 2 cups of coffee max without switching out the grinds and adding more beans. This could be a hassle for those who want to brew more at a time. On the plus side, I like using this grinder to gravel, because the Hario Mini is – well, mini!

Low Noise Level

Just like all other hand held coffee grinders, it’s very quiet. If you plan to have a cup everyday in the morning and are a considerate coffee-lover, then you’ll think about this if you always go for a cup in the morning.

Ease Of Use

Hario Slim Grinder Settings

I had no problem adjusting this ceramic coffee mill. You simply remove the hopper, there’s a knob beneath it, and you just simply turn it. This grinder features a spring system to keep the burrs from wobbling, which works well for coarser grinds. Despite this, the Hario Slim Grinder still works best in the fine to mid range, perfect for those who drink espresso or aeropress.

Preparation Method

No. of Clicks

Turkish (Nearly)

0 - 2


3 - 5

Aeropress (Inverted)

6 - 8

Melitta Pourover


French Press

Cold Brew


10 -12

14 - 16


So I tested the mini grinder a bit and came up with the results above.  You can try it out and tweak it according to your taste.

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Removable Base

After using the grinder, I had no problem unscrewing the grind container and transferring it to my pourover. This plastic container also has markings that’re handy in getting the right amount of quantity for the amount you’d like to brew.

Low Mess

The compact design is great for tucking the machine away, but it does make it more difficult to pour beans and clean the grinds in the container. These aren’t really difficult though.

Ease Of Cleaning & Maintenance

Cleaning and Maintenance

The grinder is very simple and easy to clean. Since the burrs are ceramic, there are no troubles with rusting. You either clean it off with a cleaning brush or rinse it off completely.


This grinder's price is really affordable. I think it’s a great deal considering the price and quality of grind it produces. I am slightly concerned about the handle, but even if it breaks, I don’t think anyone will cry over it as it’s quite cheap to begin with.

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The Coffee Barrister's Verdict

Overall, I think the Hario Coffee Mill Slim Grinder (Mini) is a good manual coffee grinder.  The grinder produces very nice grind in the fine - mid range, and acceptable grinds at the coarser settings.  Do keep in mind that the capacity is quite small, even for a hand grinder, but I think it's fine if you don't mind pouring the grinds out and putting more beans in.  I am concerned about the common complaint where the crank handle wears down quite quickly, although it didn't happen to me yet.  If you are still unsure, then perhaps check out the more robust, Porlex JP-30 Grinder instead.  All in all, the Hario Mini Mill is extremely economical, which makes it hard to turn down!

Hario Coffee Mill Slim Grinder

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