manual

Knock Aergrind Hand Grinder

Product Code
aergrind
$159.99

Summary

Knock's newest hand grinder sets the bar even higher, with a compact offering that doesn't make any sacrifices on performance.

Measurements

Weight
3.5 lbs
Length
12 in
Width
6 in
Height
4 in

Details

Designed to be even more compact and travel-friendly than its big brother, the Feldgrind, the Aergrind still features the same 38 mm coated steel conical burrs and stepless adjustment. Now, however, those burrs sit inside dual bearing mounts in a unibody milled aluminum casing. As before, grind adjustment is stepless and built into the upper portion of the burr shaft. Holding the lid in place, you can change your setting by rotating the handle, with a cutout indicating the number on the lid's dial for reference. In total we find the ideal grind range is covered by the first 5 revolutions of adjustment, with each revolution translating to about 0.7 mm of vertical travel between the burrs. Espresso, drip, and even french press grinds are accessible, however the smaller volume of the hopper and grinds catch make the Aergrind better suited to smaller doses and single cup brews.

The Aergrind is purposefully designed to fit inside the plunger of an Aeropress coffee maker, making for a compact travel coffee setup. The hopper holds about 30 grams of beans, and the grinds catch holds about 25-40 grams at a drip grind (3-4 revolutions). For cleaning, we recommend wiping down parts with a soft, damp cloth and drying thoroughly, and cleaning the burrs using a pipe cleaner or similarly soft-bristled brush.

 

Features

What's in the box:

  • Knock Aergrind Grinder
  • Silicone sleeve
  • Silicone holster for grinder handle
  • Spare o-rings

Features:

  • Compact hand grinder with superior uniformity
  • Small and perfect for travel
  • Stepless grind adjustment
  • Detachable handle with holster
  • 25 gram hopper capacity
  • Made to fit inside an Aeropress coffeemaker
  • 38 mm coated steel conical burrs
  • Made of aluminum, steel, and plastic

Specifications

Model: Aergrind
Burrs: Conical, coated steel
Burr size: 38 mm (ring burr OD)
Grind Adjustment: Stepless
Hopper Capacity: About 30 g
Grinds Container Capacity: About 25-40 g
Dimensions: 14.5 cm H x 4.7 cm D (without handle)
Grinder Weight: 360 g
4.54545 stars, based on 66 reviews

Verified Buyer Verified Reviewer

8/22/2019 12:36:13 PM

5 / 5 stars

Amazing little grinder

Awesome little grinder. Produces perfectly consistent grounds for single serve brewing. Great for traveling grinder. I wouldn’t want to use this grinder for multiple cups or carafe brewing as the capacity, time and physical effort makes multiple productions tedious.

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Verified Buyer Verified Reviewer

8/17/2019 11:29:50 AM

5 / 5 stars

Solid.

Solid.

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Verified Buyer Verified Reviewer

8/16/2019 10:20:09 AM

5 / 5 stars

Great travel grinder!

The aergrind is a wonderful travel/work place/backpacking grinder! It nest very well inside you Aeropress, and the grind quality is WAY better than cheaper model manual grinders.

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Verified Buyer Verified Reviewer

8/5/2019 2:52:36 PM

5 / 5 stars

Solid.

More pricey than other hand grinders out there, but if you’ve used others you will feel the quality of the Aergrind the first time you use it. I upgraded from a Porlex and am not regretting it at all.

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Verified Buyer Verified Reviewer

8/5/2019 11:13:25 AM

5 / 5 stars

Awesome little grinder

I primarily got this to use with a Flair espresso maker while I'm travelling. It makes a great shot with the Flair! Highly adjustable though the espresso range isn't very wide. It's sturdy and feels well made. I'd def recommended this grinder.

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Verified Buyer Verified Reviewer

7/29/2019 4:59:04 PM

5 / 5 stars

Awesome hand grinder

Great for drip coffee. Little bit difficult to dial in for espresso. Can grind as fine as Turkish coffee! Great value for the price.

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Verified Buyer Verified Reviewer

7/25/2019 3:55:35 AM

5 / 5 stars

Aeregrind hand grinder

This grinder is awesome. Perfect for travel and well made!

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Verified Buyer Verified Reviewer

7/18/2019 12:59:43 PM

5 / 5 stars

Great hand grinder

Very nice piece of kit. Makes very consistent grind which makes extra good tasting coffee everytime. If you enjoy “the process” of the whole coffee thing then you need one of these! Heirloom quality fit and finish.

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Verified Buyer Verified Reviewer

7/17/2019 7:48:20 PM

5 / 5 stars

Best premium travel grinder

I'm writing this review several days into the Punta Cana Beach vacation that I bought the Aergrind for. I packed this along with a plastic V60 and a Bonavita portable electric kettle. It works like a champ. Very compact for easy travel. Excellent build quality, from machined aluminum and snug friction fit. Handle stows in a rubber sleeve and mounts on the spindle in 2 seconds with virtually no play. The action is buttery smooth, and the handle stays put, for frustration-free grinding. I haven't counted, but it does take quite a few turns to grind out the approximately 30g (about 4 tbsp) required for a 500g V60 pourover. That 30g is about the max capacity of the fill barrel, so it works out well. You do have to watch the adjuster dial because it tends to wander a bit but it's not much trouble. I've been passing on the premium (by most standards) hotel capsule machine and drinking delicious fresh-ground pourover and I'm sadly running out of filters.

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Verified Buyer Verified Reviewer

7/12/2019 3:14:53 PM

5 / 5 stars

Excellent actually easier to use

Excellent actually easier to use then the feld gronder

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Verified Buyer Verified Reviewer

7/1/2019 10:42:25 PM

5 / 5 stars

Grinds like a dream

Very solid grinder

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Verified Buyer Verified Reviewer

6/18/2019 2:58:46 PM

5 / 5 stars

Great economical grinder

This is a great grinder for the price. It is very consistent in its grind. In fact I would say it produces similar results to my Baratza Virtuoso. The only downside really is the hoppers capacity. It is not a problem if you are making V60’s, Aeropress, or any other single cup pour over methods. But if you are using anything larger say over about 25g then you will need to grind in two batches. It is a downside but it also keeps the size of the grinder itself really compact. For me it has only been a minor inconvenience and something I can easily overcome for the quality and price for this grinder. Overall I would buy it again and enjoy using it when I travel. If

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Verified Buyer Verified Reviewer

5/26/2019 11:28:13 AM

5 / 5 stars

Aergrind + Flair = Bliss

Perfect for that one perfect espresso in the morning.

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Verified Buyer Verified Reviewer

5/24/2019 10:19:35 PM

5 / 5 stars

A game changing upgrade

There's really nothing wrong with a Porlex grinder, but using this with an Aeropress the difference in the cup is obvious, let alone how much more solid it feels.

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Verified Buyer Verified Reviewer

5/15/2019 4:11:03 AM

5 / 5 stars

Really easy and fast grinding

I went online to find grind settings for the aeropress. At first it might look overwhelming, but it's actually very simple. I use between 1.8 to 1.9 which is like one full turn of the dial then put the pointer to 8-9. I'm set with this setting as the taste is nice. Feels sturdy and of great build. The only thing I can point that's not so nice is the gripping of the bean grinds container to the grinder and it's kinda thin you'd have to slowly pour your beans over it. You'll have to work just a tad bit to get the container off. The container is pretty non-stick or even nonstatic I guess. The grinds just slide real easy down to my aeropress. And the best part of why this is worth buying is that the grinding was quicker than my electric kettle can boil water, and the winding has an easy, weighty feel to it, like certain sports car steering wheels. Grind quality is excellent and pretty consistent using my settings. It's also pretty silent. Pretty big step up to my cheaper ceramic burr one.

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Verified Buyer Verified Reviewer

3/7/2019 3:25:36 PM

5 / 5 stars

Immediately happy with this grinder!

Upon first turn, it is the smoothest turning manual grinder I have ever owned. It is worth the price paid, all other grinders I have owned have been in the $60 range and this Knock grinder is leaps above. Also really impressed that it can grind a turkish fine grind and the coarse grind settings church out really even particle size. Watch the video reviews on PRIMA to determine which grinder is best for you. I chose this one because it fits inside my Aeropress and my Cycling career has me travelling most of the year. The grinder was heavier than I expected.

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Verified Buyer Verified Reviewer

3/1/2019 3:36:52 PM

5 / 5 stars

Great grinder for travel.

This grinder is solid, fast, and compact. Perfect to pair with an aeropress.

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Verified Buyer Verified Reviewer

2/27/2019 7:44:57 PM

5 / 5 stars

Great, easy to use, and high quality grinder

The Aergrind produces a high quality grind in a small package, far quicker than I originally imagined. As long as you're not brewing more than 3-4 cups of coffee at a time for multiple people, this is a perfect grinder and terrific for travel. I'm more likely to use this than my Baratza Encore for the foreseeable future.

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Verified Buyer Verified Reviewer

2/2/2019 9:37:55 PM

5 / 5 stars

Great Hand Grinder

I went from a Hario Skerton since I was looking for a grinder that could do espresso and the difference is unbelievable. Very consistent grind and very sturdy design. Only negative is that since it's a travel design, the crank isn't that long and requires a decent amount of work to grind but much easier than the Skerton.

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Verified Buyer Verified Reviewer

2/1/2019 2:58:56 AM

5 / 5 stars

Great Compact Grinder

I am the only coffee drinker in the house, and this is the perfect size for making a single cup. Grind consistency is great and I love the sturdy build quality.

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Verified Buyer

5/8/2018 12:00:00 AM

5 / 5 stars

Great for Aeropress!

The grinder is perfect for use with the Aeropress. I have been using it about five times per week for the last two months. It is fairly easy to use and it is not that hard to grind. It takes about 30-40 seconds. As advertised, it fits perfectly inside the Aeropress when traveling. I was skeptical that a burr grinder would make that much of a difference in the taste. I have to say, the coffee is significantly better. I tried two different single origin coffees using a blade grinder and the Aergrind and the burr grinder made a much richer cup. I would not recommend it for people looking to make multiple cups of coffee as the grinder only holds between 25-30 gms.

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Verified Buyer

4/20/2018 12:00:00 AM

5 / 5 stars

Amazing Hand Grinder

I love this grinder! So glad I decided to invest a bit more and get an excellent quality grinder. (Originally was considering a Hario.) The handle does not have "knock" stamped on it like in the product photo. I prefer it without the stamp. Visually, it‰Ûªs very sleek. The build quality is excellent. It's very sturdy and feels like it is going to last forever. Uniform grinds even at coarse settings and fast. I'm a woman with medium-sized hands and I don't find the Aergrind difficult to use at all. It fits well in my hand and the amount of effort needed to crank the handle is easily managed. If I attempt to grind more than 22-25g of coffee, it's too much for the bottom compartment. Easily remedied by emptying the bottom part way through. I use it mostly for pour over or French press. Love the analog experience of hand grinding coffee for my cuppa each morning. The smell of the fresh ground beans wafting up as it‰Ûªs ground. There is a really satisfying way feel to the way it grinds.

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Verified Buyer

3/25/2018 12:00:00 AM

5 / 5 stars

Knock Aergrind

If you are looking for an exceptional burr grinder under $120, look no further. I love having a grinder that does not retain a significant amount of coffee grounds (much less than 1 gram). In contrast, my Capresso Infinity grinder required me to remove its bean hopper and central burr to remove any retained coffee grounds, which sometimes amounted to 3 grams. I mostly make pour over coffee, and the Aergrind's stepless grind adjustment gives my coffee much more clarity than my Capresso grinder. Be aware the Aergrind will generate a lot of static when grinding its first pound of coffee beans. After the first pound, the static issue goes away. Overall, it is a great choice for a manual grinder.

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Verified Buyer

2/7/2018 12:00:00 AM

5 / 5 stars

Great portable grinder

Very impressed by the build quality and grind consistency. No wobble at all. Much quicker to grind than my old hand grinder (Hario). Would recommend!

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Verified Buyer

2/7/2018 12:00:00 AM

5 / 5 stars

Excellent Quality

Fast for a hand grinder, and, more importantly, the grounds are uniform. I can feel the quality when turning the handle. Smooth turning and solid construction.

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Verified Buyer

1/26/2018 12:00:00 AM

5 / 5 stars

Super well built grinder

I am super pleased with this grinder. Its everything everyone has said...superior grind. I now love my Aeropress again. I have only ONE wish - that single plastic top should be made of aluminum or stainless steel...(aftermarket part?)

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Verified Buyer

1/23/2018 12:00:00 AM

5 / 5 stars

Great grinder

Powerful, compact, and precise.

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Verified Buyer

1/22/2018 12:00:00 AM

5 / 5 stars

Getting good grinds thus far

I have a baratza virtuoso as my usual everyday grinder, however the person i live with does not work on tuesday and thursday so i needed something quiet to grind coffee on those mornings. Thats where the Aergrind comes in. I was skeptical of a handgrinder at first, but it really doesn't take much effort! 20 grams of coffee takes about 40 seconds to grind. much quieter than the virtuoso as well. I haven't put a whole lot of beans through it yet, so i am sure it will improve, but so far so good!

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Verified Buyer

1/20/2018 12:00:00 AM

5 / 5 stars

Scottish handiwork

i have only had my aergrind for a week or two; so far it has been amazing. Transitioning from a Baratza Encore, I am very pleased with the grind particle consistency; i am using his grinder for medium to large drip brews (V60 and Chemex primarily). Even 0.75L (~26.5oz.) brews are clear and timely, with no noticeable increase in choking the filter from my Encore. Stepless adjustment is great too.

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Verified Buyer

1/18/2018 12:00:00 AM

5 / 5 stars

You can really taste the difference!

It's crazy how good this thing is. Love how much faster this is over my old hario minimill, and I can't ever go back. I'm tasting notes in my coffee that I've never tasted before, and for that, it's totally worth it.

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Verified Buyer

1/14/2018 12:00:00 AM

5 / 5 stars

Great Grinder!

Love the Aergrinder! Smooth, even grind!

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Verified Buyer

1/6/2018 12:00:00 AM

5 / 5 stars

Complete game changer for espresso

With the introduction of the Aergrind by knock, the entry level espresso world becomes a lot more accessible for everybody. There are no good espresso grinders out there under $120, and unless you want to take a gamble with questionable build quality by Breville, no grinders that grind the full range from espresso to French press under $300. The Aergrind is amazing for espresso and the stepless and fine adjustments let you really dial for your machine, something that can't really be done with the Baratza Encore in the same price range. I use around 1:4 to 1:9 on my old and cheap Coffee Gaggia and can pull shots between 20 and 30 seconds while my old Hario mini mill never got fine enough to break 15 seconds. Even if you're not using this for espresso, the grind consistency improvement over Hario hand grinders is huge, bringing out so much more clarity in every cup of pour over and Aeropress. The Aergrind has something for everybody who has been using a grinder under $50 and is looking to move up.

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Verified Buyer

1/5/2018 12:00:00 AM

5 / 5 stars

A very nice grinder

I purchased this grinder as a present for my coffee minded significant other. It's a huge upgrade over using an electric blade grinder in terms of grind quality, and a very cost efficient option over other burr grinder options. The size makes it ideal for a single-coffee drinker household. Performing the grind is pretty quick and painless. It comes well packaged and Prima shipped it quickly with plenty of time to spare before the holidays. The only downside is that the Knock came with no instructions at all; we had to spend some time to watch video tutorials / read guides on the Feldgrind and try to apply it to this model to get started.

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Verified Buyer

1/1/2018 12:00:00 AM

5 / 5 stars

Wonderful for making one drink

I was considering getting one of the bigger hand grinders (Lido, Knock, etc), but ended up buying the Aergrind this because I never grind more than 18g at a time for espresso. This option was also more affordable! This is a very compact, solidly built grinder. I have not noticed any wobble while turning the burrs, and grounds seem to be very consistent. Grinding my usual 16g of espresso takes less than two minutes of reasonably fast grinding - much less work than my old Hario Skerton. My only complaint is that removing the bottom compartment to retrieve grounds can be difficult sometimes. Overall not a huge issue, just adds a few seconds to the work sometimes. Overall, wonderful grinder for those who only make one drink at a time. For serving multiple drinks I'd go for one of the bigger options, but for my purposes this grinder is perfect.

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Verified Buyer

12/30/2017 12:00:00 AM

5 / 5 stars

Impulse and Regret

My Porlex mini had become a regular travel companion. Snuggled into my Aeropress, we'd head around the world together with some bags of beans and a couple changes of clothes. Hotels would become clandestine coffee labs as I learned and re-learned how to boil water with various different devices not meant for the job. And then I started hearing about this Aergrind and was consumed with an irrational lust. $100+ for a travel grinder? But the one I have was less than half the price works great. I mean it works well. Well, it works. The Aergrind kept tempting me, taunting me, but it was always out of reach and I didn't mind. But then Prima got some in. And Prima was having a holiday sale. And before I knew it there was a confirmation email at the top of my inbox and a growing sense of buyers remorse in my stomach? Did I make a mistake? When the Aergrind came the remorse immediately became regret. Regret that I had ever felt remorse. Regret that I had put up with an inferior product. Regret that I had ever doubted. Find an Aergrind. Hold it in your hands. It feels amazing. The quality of the craftsmanship on this thing resonates into your fist. It's a smooth grind, you can feel the power of those easily adjustable burs. Welcome to the family, little Aergrind. Let's travel the world together and jitter into adventure.

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Verified Buyer

12/29/2017 12:00:00 AM

5 / 5 stars

Very good value

Purchased to gift, but had to test before letting go. At a drip setting, med/dark roast, was very smooth grind, little effort needed, and quick. Took two loads in the grinder to fill the basket, but was still fast. With a bit of practice, should be even faster. There was a bit of static so the ground coffee was piled on the sides of the bucket, but a tap on the base and all the coffee came out easily. Very tempted to get another for myself, but SO suggests that three grinders may be enough for now :)

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Verified Buyer

12/28/2017 12:00:00 AM

5 / 5 stars

best travel grinder

just back from three weeks on the road with this grinder and I have to say that it is excellent and a major improvement over the hario I used in the past: better grind consistency and much easier and faster to grind. Highly recommended! I only used one grind for the aeropress so can't comment on its ability to change grind settings.

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Verified Buyer

12/26/2017 12:00:00 AM

5 / 5 stars

Best bang for buck

I bought this because I was in search of a quality grinder to meet my needs varying from Aeropress to 8 cup Chemex. I have a Baratza Sette 270 which I bought for my 30th birthday last year based on the manufacturer claiming that it could grind coarse enough for a Chemex. I have beer really disappointed with it, and have a very hard time not getting a bitter, and muddy cup. I am sure it‰Ûªs great for espresso, but I don‰Ûªt do espresso at home. I read the reviews about this little guy, and figured I‰Ûªd give it a chance because of the price point. This thing is amazing. I look forward to using it every morning. It takes about a minute of grinding at a reasonable pace for my 22g dose for my V60. The consistency is far superior to a Baratza Maestro plus that I retired a few years back. It cranks very smoothly. The first hang grinder that I ever purchased was a Hario Skerton. The burr wobble was terrible, and the burrs didn‰Ûªt have an agressive cut so it took like 5 minutes to grind a normal dose. The next hand grinder that I owned was the HandGround hand grinder. I had backed it on Kickstarter. It did grind much quicker, and is superior to the Skerton. I didn‰Ûªt like the ergonomics, and the consistency isn‰Ûªt as good as the Aergrind. The only negative about the Aergrind is the small capacity, but considering that it is specifically designed to fit inside of an Aeropress for travel Knock couldn‰Ûªt really do more. 22g is about max capacity for this grinder. Overall, I am very please with my purchase.

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Verified Buyer

12/22/2017 12:00:00 AM

5 / 5 stars

Knock Aergrind Grinder

Another missing link to great coffee. Paired with Aero Press CoffeeMaker a hard to beat duo.

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Verified Buyer

12/22/2017 12:00:00 AM

5 / 5 stars

Excellent manual grinder

Tested the grind for aeropress, chemex and espresso and I'm extremely pleased with the results. The grind is very consistent with not many fines. The speed for grinding is pretty fast and not fatiguing. As many people agree, I wish the dial cap was made of metal. Otherwise, very solid and quality craftsmanship.

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Verified Buyer

12/22/2017 12:00:00 AM

5 / 5 stars

Good purchasing experience

I purchased an aergrind. The price was fair, ordering was easy, and when I called for clarification on a shipping issue, the associate was polite and helpful. I'd definitely do business with Prima Coffee again on the basis of this experience.

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Verified Buyer

12/18/2017 12:00:00 AM

5 / 5 stars

Knock Aergrind Hand Grinder

Love it!

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Verified Buyer

12/15/2017 12:00:00 AM

5 / 5 stars

Aergrind

Great item

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Verified Buyer

12/7/2017 12:00:00 AM

5 / 5 stars

awesome grinder

It's a lot better than my previous $20 burr grinder, and also very easy to use

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Verified Buyer

11/28/2017 12:00:00 AM

5 / 5 stars

A Wonderful Manual Grinder at a Reasonable Price!

The quality of the build is exceptional - the shaft rotates easily and appears to be perfectly aligned without any apparent wobble. The parts are finely milled, fit together nicely, and are well designed. The burr spacing is easy to adjust and the handle attaches without much effort and remains in place during the grinding process. The operation of the grinder requires less effort and is considerably more refined than that of the Skerton (non Pro model). The consistency of the grind was comparable to a Baratza Virtuoso. I have not used a Lido, but I am very impressed with the Aergrind. I generally defer purchasing new products until the initial production problems are solved. The product is well packaged in bubble wrap within a cardboard tube. Usually, I can identify flaws or dislikes that I would suggest be corrected in future versions. The only flaw that I have identified is the lack of instructions. However, there are Youtube videos that explain how to adjust the burrs. Finally, there are extra O rings that are included with the grinder.

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Verified Buyer Verified Reviewer

9/17/2019 12:41:39 AM

4 / 5 stars

Smooth grinding.

Aergrind is perfect for traveling. Space management is critical for me in regards to packing. This grinder fits the bill. Compact design for my go to brewing method, the Aeropress. It fits great in the hand and grinds with relative ease...even with light roasted beans. I tend to lose some beans when filling the top grind chamber, due to the small diameter. This isn't really an issue. I have difficulty seeing how to line up the dial lid and handle, but I refuse to wear glasses. Lol. My biggest complaint would be the retention of grounds on the burr set and lower chamber. If you aren't worried about consistency, no worries. Overall, it seems to be a great grinder with consistency in grind size. I would recommend for the person who travels or just simply doesn't like large items on the kitchen counter.

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Verified Buyer Verified Reviewer

8/16/2019 8:14:37 PM

4 / 5 stars

Great Travel Size Grinder

Out of the four grinders I've owned, this one is the best by far. The quality and consistency of the grind is amazing. I also love the fact that it is so travel friendly. It fits in my aeropress and comes with a black band to attach the handle. My one Knock against the Knock Aergrind is loading beans in the hopper. Every time I get ready to grind part of me panics because I'm worried that beans will be all over the place or I'm going to have a hard go of it.

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Verified Buyer Verified Reviewer

5/13/2019 3:05:35 AM

4 / 5 stars

Great

Really a great product here. I've just started getting more and more into coffee, and this grinder here has made my experience so much better. Really connects me to the process of brewing much more, and it has been so enjoyable to spend an minute grinding my coffee in the morning. My one criticisms are the lack of directions that came with the grinder, as the package came with just the grinder, and the elastic ring to hold the handle is annoyingly loose. Other than that, I'd recommend this product easily.

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Verified Buyer Verified Reviewer

4/7/2019 8:34:06 PM

4 / 5 stars

Fantastic, but aer on the safe side

Overall an incredible little piece of handiwork. My only gripe is the learning curve. If I didn't come from a professional barista background I would have found this set up a little frustrating. Thankfully I already knew about a reddit post discussing this grinder and its settings to try out. I do recommend buying a cheaper coffee (or a coffee you know the profile of in your sleep) to test out settings for what you brew with and note those down for future reference. Overall though I am really impressed. I use this little guy mainly for home and it fits seamlessly into every little tight space my tiny kitchen can accommodate. It's easy on my wrists, but I can still feel the density of the beans without that compromising a speedy grind. This grinder fits a barista who likes to play around with profiles, comparison tastings, and brew flights.

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Verified Buyer Verified Reviewer

3/6/2019 1:11:02 AM

4 / 5 stars

An excellent upgrade

Significantly better than my previous Javapress grinder. Great for travelling with my Aeropress. I wish the hopper just a bit more capacity and that the Aeropress funnel fit neatly inside the hopper during bean transfer. Otherwise, excellent build and grind quality.

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Verified Buyer

1/17/2018 12:00:00 AM

4 / 5 stars

Pretty good.

I like it. I use it every day. I have nothing else to compare it to, but it grinds my beans, so I'm happy.

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Verified Buyer

1/13/2018 12:00:00 AM

4 / 5 stars

Hard to find instructions.

Just got this grinder for my travel aeropress kit. Overall, I really like the grinder. I have only been using it about a week though. I can fit about 27g of beans in it but they fit right to the very top of the chamber. Sometimes the lid doesn't go all the way down but a few spins and it closes up. It is solid and well built. The only plastic part is the lid but it doesn't really have any tension on it to cause breakage so I think it will last. It can grind very, very fine. Main issue I had is the lack of instructions. I had to dig around the net to figure out how to use it. The company that makes them doesn't even seem to have anything on it. Also, the info I found around the net on grind settings for pour overs to be way too fine. It was so fine the water could barely pass through it. Your best bet is to spend 30m grinding beans at different settings and comparing them. It helped me figure out fine-medium and now I'm dialing it to what I want vs the recommendations I found. Only other thing that would be nice is if the 1 on the dial was white so it was easier to tell when you made a setting rotation. But that is easily remedied with a silver sharpie. I am really happy with the purchase and prima shipped if really fast even when it was on backorder at my time of purchase.

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Verified Buyer

12/24/2017 12:00:00 AM

4 / 5 stars

Knock Aergrind

Simple, small But it is good to use.

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Verified Buyer

12/22/2017 12:00:00 AM

4 / 5 stars

Knock Aergrind

The Knock Aergrind is a fantastic product. After doing preliminary market research on hand grinders, I was excited to snag one from Prima for a great price (and blazing fast shipping). First off, the grinder feels great in one's hand, albeit a bit small. Grind adjustment is very simple and seems quite stable. Very portable and ergonomic -- no complaints here. The construction and housing of the burr set is solid. Operation is very smooth and it grinds much faster than my old Hario mini mill. Particle consistency is a big upgrade from the Hario as well. I use the grinder for drip coffee, and I have had great results thus far. The only "knocks" on the grinder are: -small capacity: ~25g of coffee, depending on bean size -at a filter grind setting, it produces a fair amount of fines -- enough to choke the filter towards the end of extraction -flimsy plastic cap; after a week of use, the cap has loosened and can fall off if not held in place by the handle -grinder arrived not fully calibrated; the zero point of my unit started at the number 2. A small detail, but hopefully Knock can iron this one out in future production/QC Would recommend for anyone looking to upgrade their grinder without it costing an arm and a leg. There's something satisfying about manually grinding your bean. Great value, shoutout to Prima for their great customer service.

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Verified Buyer Verified Reviewer

5/18/2019 2:58:41 AM

3 / 5 stars

Could have been better

While not a bad grinder for the price I decided to send it back to Prima as I felt for a little more money I could get something that would last me in the long run. A couple of small things I did noticed: The rubber band that held the arm was not tight (I am sure I could have got a replacement), felt with time the bolt on top could wear down and it was not as good of consistency as I have heard. Maybe it was just this one for the small issues. On the plus side it does have a nice look and it fit inside my aeropres which was cool. Overall a solid grinder that can get you through at a good price point but not for me.

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Verified Buyer

5/1/2018 12:00:00 AM

3 / 5 stars

Works great but the lower half seperated

This is an excellent grinder but I fumbled one day and dropped the lower half on my countertop. The silver disc engraved with the Knock logo seperated from the remainder of the lower half. I understand that I dropped it but I can also see the remnants of the adhesive used and it did not appear to be consistently applied.

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Verified Buyer

3/23/2018 12:00:00 AM

3 / 5 stars

Average

Grind is good except for coarser french press grinds -- quite uneven. Lid is loose and grinder won't zero-out and calibrate as it was designed to do. Additionally, Knock provides no support. I would not purchase anything from Knock again. Peter Kilpatrick does not respond to the form on his site, email, Facebook or Instagram. Unfortunately, Prima will not provide his phone number, even though I purchased the grinder through them.

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Verified Buyer Verified Reviewer

5/20/2019 2:58:00 AM

1 / 5 stars

Disappointed customer

I received a cosmetically imperfect pieve. When I contacted Prima coffee I was told in a very polite way to suck it up. For something that costs more than a $100 USD it's weird that they do not guarantee a product free of blemishes. It felt like I was buying a phone with scratches even though it was new out of the box. I have since returned the product, though I have yet to receive my refund.

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Verified Buyer

3/20/2018 12:00:00 AM

1 / 5 stars

Knocking Knock

Knock makes decent -- not perfect* -- grinders but rips off customers. Still waiting for a refund for a grinder I ordered in December and he never sent. Called Prima to complain and they would not provide contact info. Lots of complaints online about Knock. There are better grinders out there and Prima should find credible suppliers. *Top lid becomes loose with minimal use

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Verified Buyer

1/13/2018 12:00:00 AM

1 / 5 stars

Be wary, be very, very wary.

I understand that the Felgrind has received quite an amount of praise for it quality of grind among its owners. I also understand the assumption that the Aergrind would be more or less a smaller slightly less feature rich version of the Felgrind. However it is not. I ordered this with the first batch Prima got on Nov, 24 and as such, am beyond a return. But to speak plainly to you, with all due caution, I absolutely loathe this grinder. It looks, great, it feels solid and it "feels" like a great grinder. However, the grind you get is all over the place. I primarily do pour over (V60, Kalita) with an occasional Aeropress. Even at these relatively fine settings the grind I get is inconsistent to the point of being on par with, or much worse than a Skerton Pro. My Aergrind arrived with it's "zero" mark being 2:1. Not a huge deal per se but you cannot adjust this to get it to actually be "zero", and if you search around you will see people have received them with their "zero" ranging from 1 (good) to as high as 7? And this, is where the signs of quality control concerns begin to arise. The cap for mine (with the number marking used to measure adjustment) does not sit flush with the top of the grinder, and if you touch it at any point it will teeter-totter on the top of the grinder. In using the grinder, the settings I have adjusted to will change (loosen) during the course of the grind. This is while doing small batches mind you, so say I am set at 2:12:1, when I have ground 16g it may be at 3:1:2. You can see why that might become an issue. After all, you bought a "good" grinder namely for improved consistency correct? All in all, if I were able to return it, I would have with no regrets. And I labored over writing such a scathing review, but, I feel like this product is more beta than complete and if I could do it again, I would skip this and get either a less expensive grinder so that the quality of the grind is offset by the price of the grinder, or just bite the bullet and buy a Lido. TLDR; I'm stuck with it, to warranty it is to ship it OCONUS, wait for a looong time and possibly end up in the same situation again. Too late to return it (Holiday travels ruined the time frame). It has quality control issues. It grinds inconsistent even at relatively fine grinds (don't even dream about a usable French Press). The grind will change in the course of grinding as little as 15g, and will be massively different in 4 to 5 days of grinding.

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Verified Reviewer

2/7/2019 2:26:55 PM

5 / 5 stars

Obvious Improvement

I spent years with a Hario Skerton. I was reasonably happy with the coffee I was making and put effort into the rest of my brew process to try to find improvements. But, I finally decided to try putting my.skerton grounds through a sieve and the inconsistency I was getting was way worse than I expected. Brewing with the boulders and fines removed made such a huge difference that I took the plunge and bought the Aergrind. The improvement in my coffee is immediately obvious. This is truly a “throw money at the problem” kind of situation. If you are on this website then you probably already have self selected and are the type of person that cares enough about your coffee to consider this grinder spending this much on a hand grinder. Congrats. That was the hard part. Once you spend the money it is all easy from there. The grind process is smoother and the results are just better. The only downside is the capacity. The grinder holds about 75% of the beans that I wish it did so every brew I have to fill it twice. If I were buying again I would give up a little portability and get the bigger one.

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Verified Reviewer

1/23/2019 11:06:07 PM

5 / 5 stars

Oh! I can get a new rubber band to hold the handle!

This is a followup to my review from a couple days ago. To recap, I regret stretching the rubber band that affixes the handle to the grinder in order to fit it onto my Aeropress. It turns out I prefer to have it affixed to the grinder. And since I can't un-stretch it (I tried the boil it trick. It didn't work), I thought I was out of luck. But Peter sells replacement bands on his website, It's pricey due to the cost of shipping from the UK. But I'll take that as penance for my lack of foresight. And now I'll have the best of both worlds.

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Verified Reviewer

1/20/2019 1:34:58 PM

5 / 5 stars

Perfect for travel, and excellent for everyday use

I purchased this for travel to use with my Aeropress. I now often use it for everything except espresso. The only reason I don't use it with my espresso machine is because I'm lazy that it takes too long to dial in a manual grinder, and because I have a Rocky for that purpose. I compared the grind quality to the rocky at espresso and Aeropress grinds, and found them to be equally consistent. And the Aergrind did not have Rocky's characteristic clumping at espresso grind. I find the Aergrind is less consistent at courser french press grind (about 4-0). But no less consistent than the Bodum Bistro I normally use for that purpose. I've been using the Aergrind for almost a month now. I have not experienced any drift of setting whilst grinding as others have reported. Maybe that's due to the new aluminum cap. Whatever the reason, I've never had it happen. My only complaint, and it's more on me than on Peter, is that the rubber band used to hold the handle cannot be reused on the grinder once it's been stretched over an Aeropress. I tried it out on the Aeropress, found that I prefer having the handle affixed to the grinder (I know, then I can't slide it into the Aeropress body. But I'm not so chuffed about that.). With it afixed to the grinder, the knob of the handle acts to keep the aluminim cap from falling off. But now that I've stretched it, I can't go back. If only I could buy a replacement band, then I'd want for nothing.

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Verified Reviewer

5/28/2019 11:55:18 PM

4 / 5 stars

An Excellent Bang for your Buck Grinder

I've had a great time with the Knock Aergrind so far, and would recommend anyone that doesn't mind hand grinding and is looking to step up their grinder game a bit. The grind consistency is very good from what I've seen at a range of coarseness. Whether I'm making espresso or french press I get very little to no fines and clumps are non-existent. The small size is a plus as it makes it great for travel and conveniently fits inside of the aeropress. The robust metal construction also helps with it's capabilities for travel. The only problem I've had so far is with the coarseness selector, which doesn't zero in a 1 like it should, but otherwise is stiff enough to ensure that the burrs don't adjust while I'm cranking. Due to it's small size, it can't grind much coffee at once and also not very quickly, but this shouldn't be a problem for the niche it's trying to fill. All in all, I've been very happy with my purchase and would recommend to anyone wanting to start getting into higher-end grinders with an entry level price.

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Verified Reviewer

5/4/2019 2:53:50 AM

4 / 5 stars

Great practicality, potential durability issues (Long-term review)

I bought this almost right after it was released, in December of 2017. This means I have the original design, without the white text (same as shown in the video above). I'm not sure if any other aspects of the design have changed since then, but I imagine it's only the cosmetic changes. The grinder feels high quality, with solid machining and relatively good fit and finish. The plastic cap stopped snapping on (meaning it will easily fall off if turned on its side or upside down) after a couple months of use, but it's not a big deal. The rubber sleeve that holds the handle never fit snug against the grinder, and was pretty difficult to wrap around an aeropress. I hope they've changed the fitment or rubber durometer to help with this, as it seemed like it wasn't designed to meet either of its use cases. The grind quality has been good (noticeable step up from skerton with added shaft stabilizer), and my unit didn't have any burr wobble. With lighter roasts, grind distribution is worse since the beans are harder/denser, but it's still plenty fast and easy to use. After using almost daily it for over a year, the base of the grounds bin (silver metal plate) fell off in Jan/Feb. It's attached a shoulder on the bin with an HAF (heat activated film) which seemed to have embrittled and lost adhesion over time. It's worth noting that I usually knock/tap on the grounds bin to empty it out when I brew, which could have contributed to the failure. Either way, best to be careful with the part (and of course don't try to push it out from the inside). There was a great deal of disappointment when this happened, but maybe I just got a bad unit – I understand it takes some time to lock down adhesive curing parameters, and Knock was definitely having production issues when this was first released. Long story short, it was easily fixed with some epoxy after cleaning down the mating surfaces. Still works the same, and still use it regularly! Also, quick tip on cleaning out the burrs without disassembling – with the grounds bin detached, repeatedly press up on the lower burr to compress the spring and rotate the burrs against each other. This should clear out any coffee stuck in the burrs.

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Verified Reviewer

6/12/2018 4:57:46 AM

4 / 5 stars

good

feld is good

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