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Meet the AERGRIND(tm), a new travel coffee grinder by Knock. Aeropress & V60 compatible, unparalleled grind consistency, speed & value.
Meet the AERGRIND(tm), a new travel coffee grinder by Knock. Aeropress & V60 compatible, unparalleled grind consistency, speed & value.
Meet the AERGRIND(tm), a new travel coffee grinder by Knock. Aeropress & V60 compatible, unparalleled grind consistency, speed & value.
533 backers pledged £48,624 to help bring this project to life.

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Aergrind: the new Compact Coffee Grinder made by Knock

£48,624

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What is a prototype?

A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:

Proof of Concept

Explorations that test ideas and functionality.

Functional Prototype

Demonstrates the functionality of the final product, but looks different.

Appearance Prototype

Looks like the final product, but is not functional.

Design Prototype

Appearance and function match the final product, but is made with different manufacturing methods.

Production Prototype

Appearance, function, and manufacturing methods match the final product.

Ada140249921db277c5cb9e400cd7912 original

Prototype Gallery

These photos and videos provide a detailed look at this project’s development.

The Aergrind is our new compact coffee grinder - it aims to bring the technology and grind quality that we at Knock have honed through our previous designs to a wider audience by being the first of our grinders that are truly scalable for volume production.

At an expected RRP of £85 inc taxes, the Aergrind brings cafe quality taste with you anywhere you can brew your own coffee. The quality of your coffee's grind is directly linked to the flavour in your cup. Put simply...

a better grind means better coffee.

So, what's special about the Aergrind compared to other grinders?

A son-of-Feldgrind design, the Aergrind will bring 3rd Wave, cafe-quality grinding to wherever you and your imagination can take you. And all that at a price which will re-set market expectations.

A compact grinder that is slim enough to fit inside an Aeropress(tm), the Aergrind will be the go-to grinder for an entire generation of coffee enthusiasts. Our specially hardened black steel burrs (not blunt and breakable cheap ceramic) running on food-grade bearings means a durable grinder that is good for hundreds of kilograms of coffee - years of trouble free consistent grinding. And it's that consistency that makes for better tasting coffee.

How do we achieve that?

The aim of this project is to raise enough funds for us to start the first Aergrind production run at  a scale that makes it possible to pass on savings to the customer and meet the growing worldwide demand for our products.

And this is where the Aergrind is really  different -  our current designs limit volume production, the Aergrind's encourages it!

Our Kickstarter investors will benefit by receiving a grinder at up to a 50% discount on the expected retail price. We're even giving one away for the princely sum of £1!

You will also know that you are enabling Knock to grow our team, develop our retail network and enable us to realise the benefit of our innovation and intellectual property.

By simplifying the design, minimising the number of parts and introducing  a clever twist to the dial adjustment, the Aergrind delivers the same grinding principles that made the Feldgrind a worldwide success to those in the know, but at an easier entry price.

A successful project will allow us to bring all our 4 years and 3000+ grinders worth of experience to higher volume production.

The funds raised will immediately enable us to hit higher volume orders that significantly reduce machining costs. They will also allow us to pay for the custom dial lid mould - we have costed for a single cavity as a minimum but achieving our higher aims will yield enough to pay for multiple cavity mould that again reduce overall costs which itself has benefits post Kickstarter by putting us in a great position to keep the eventual retail costs down.

Importantly your investment will also bring in staff to match the challenges that an addtional project of this scale will bring - initially it will allow us to hire a dedicated customer service person to deal with the project processing. It will then also allow us to bring in and train more assembly and packing employees. It is expected that these roles will then be developed into long term positions in support of the growing retail and wholesale business that the Aergrind will generate. Real jobs in a growing industry.

We are limiting the total amount of Aergrinds available through Kickstarter to 841 units. In combination with ordering enough parts in our first order run to accommodate same again in the post Kickstarter delivery period, this will ensure we can achieve the delivery time-frame targets - an open-ended offering would cause delays while specialist suppliers find production time for previously unspecified volumes (the number of burrs sets for example is already well within our partner's capacity and our own ordering schedule).

The scale of the additional parts order will be used to ensure availability to those who come too late to be part of this Aergrind release but nevertheless will want to order what we are confident will be the best compact grinder around.

Risks and challenges

Having made 2 of the most successful hand grinders of the last 5 years, the Hausgrind and the Feldgrind, we know how to design a grinder!

We also have deep, real world experience of what can go wrong in translating grinder design from CAD to actual production not only from our grinder manufacture experience, but also from our other goods which have used multiple methods of production (e.g. rubber and plastic injection moulding).

Primary problems in high quality grinder manufacture arise around fit and alignment of burrs to grinder body - we are using the same burrs, both in production and processing companies, from our current grinders to ensure that this critical part is not a variable (we have had 1000s of these pass through our hands in the last few years and have data and experience to match).

Our machining companies have been selected from our experience in other areas of high value industrial engineering production. Our final production contracts include speedy provision of 100 beta units which will be delivered and built up for field testing prior to the full production run being green lit - these will be distributed to coffee industry testers across the UK and world-wide, and a randomly selected % of the Kickstarter community (yep, these lucky folk will end up with 2 Aergrinds!).

In simplifying our design for the Aergrind we have deliberately minimised the number of moulded parts, preferring to rely on machined body and mechanism. Aside from the benefits in strength and finish quality this will bring to the Aergrind, this also benefits the Kickstarter process by removing extremely time consuming and expensive issues that arise from part-to-part fit, which have to be dealt with sequentially. Basically the lead time for accurately machining finished metal items is shorter than the lead time for plastics - no mould design/manufacture/material & shrinkage compensation and subsequent fit tolerancing issues to bedevil production times.

Furthermore, we have sequenced the production to ensure that where there is a moulded to machined part fit, the latter's machine run is started pending the actual arrival of the production moulded piece. This allows any for micro variations in fit to be accommodated in the machined part. The additional cost of fast-tracking the moulded parts to achieve this has been factored into costs.

We are limiting our maximum offer of this grinder for Kickstarter rather than leaving it open to ensure that we don't exceed numbers of grinders that we can realistically build in the delivery time frame.

However we have modelled this project to allow us to order considerably more parts than are required to make this limited run.

These additional parts are our guarantee on covering any damaged or substandard parts that are delivered - the scale of this "over" order is such that the it will further form the initial stock for subsequent full price availability via our webstore and our current wholesale network.
Cosmetic problems such inconsistent colour finish are being avoided by specifying identical material source, tolerancing and even tool type and speed used to produce the 2 main body parts - this will mean that both body parts then receive the same treatment regardless of their function, both in machining and anodising.

We have been preparing for additional staff to take on roles withing the company for the period of the Kickstarter campaign and the production process. Over the course of the last few months (including the pre-Christmas build period) several of these potential new team member have worked with us and we are confident that they have the skills in place to hit the ground running. In addition, the Aergrind has been deliberately designed so that the build process frees our most experienced team members to focus on the fit and alignment of the grinder's burr mechanism - the most important part of getting the best value grinder to the Kickstarter community.

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Support

  1. Reward no longer available

    Pledge £1 or more About $1.25

    Aergrind Snowballer

    Yep - £1 for the first Aergrind sold and you get to start the Snowball rolling.
    We'll shove an Aerdisc(tm) and some goodies in there too depending on how far along the extension goals get!
    Save £84 on estimated rrp inc taxes

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  2. Select this reward

    Pledge £3 or more About $4

    Aerdisc Aergrind Supporter

    Aerdisc(tm) Aergrind Supporter edition
    Specially engraved Aerdisc(tm), the all steel filter disc for everyone's favourite compact brewer, the Aeropress (tm).
    No need to dive in for the Aergrind, you can suport the Aergrind project and Knock's plans for world domination just by buying yourself (and every coffee nut in your life!) a robust, reusable stainless steel filter disc.
    save £3 on estimated Aerdisc rrp

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    £
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  3. Reward no longer available

    Pledge £45 or more About $56

    Aergrind A-team

    Aergrind A-teamers get the full set:
    Black Aergrind* plus Aerdisc,T-shirt, mug, and coffee from one of Knock's partner roasters.
    Save £40 on estimated Aergrind rrp inc taxes
    extras valued at £30 retail
    *colour of choice if extension goals are met

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    Reward no longer available 20 backers
    £
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  4. Reward no longer available

    Pledge £45 or more About $56

    Aergrind Speedy Saver

    Get in quick! Black Aergrind plus Aerdisc & Mug
    Save £40 on estimated Aergrind rrp inc taxes
    extras valued at £12 retail

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    Ships to Anywhere in the world
    Reward no longer available 30 backers
    £
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  5. Reward no longer available

    Pledge £50 or more About $63

    Aergrind Smart Saver

    Black Aergrind plus Aerdisc & Mug
    Save £35 on estimated Aergrind rrp inc taxes
    extras valued at £12 retail

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    Ships to Anywhere in the world
    Reward no longer available 40 backers
    £
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  6. Reward no longer available

    Pledge £55 or more About $69

    Aergrind Saver

    Black Aergrind plus Aerdisc,
    Save £30 on estimated Aergrind rrp inc taxes
    extras valued at £6 retail

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    Ships to Anywhere in the world
    Reward no longer available 75 backers
    £
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  7. Reward no longer available

    Pledge £55 or more About $69

    Aergrind Gentleman saver

    Black Aergrind plus Aerdisc, t-shirt & mug
    Save £30 on estimated Aergrind rrp inc taxes
    extras valued at £22 retail

    By choosing this you're letting us know you're not in a rush and that you're happy to hold the door for other, more urgent folk ;-)
    you'll receive your black aergrind in a 2nd wave of despatch but before we go live with retail sales

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    Reward no longer available 153 backers
    £
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  8. Reward no longer available

    Pledge £85 or more About $106

    Aergrind Week One Double Saver:

    for one week only - upgrade your day one purchase or go large from the off.
    2x Black Aergrind + 2x Disc + 2x Mug + 2x t-shirt
    Save £80 on estimated Aergrinds combined rrp inc taxes
    extras valued at 2x £22 retail

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    Reward no longer available 50 backers
    £
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  9. Select this reward

    Pledge £85 or more About $106

    Aergrind Double Saver:

    upgrade your day one purchase or go large from the off.
    2x Black Aergrind + 2x Aerdisc
    Save £80 on estimated Aergrinds combined rrp inc taxes
    extras valued at 2x £6 rrp

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    Limited 103 backers
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  10. Reward no longer available

    Pledge £175 or more About $219

    Aergrind Hausgrind Walnut

    One for home and one for away.
    1x Walnut Hausgrind (turned, solid walnut knob and body with alu liner; 316 stainless steel core, shaft and fittings; enamel dial; black steel burrset).
    1 x black Aergrind, 1 x Aerdisc.
    Save £78 on hausgrind + Aergrind combined rrp inc taxes
    extras valued at £6 rrp

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    Reward no longer available 12 backers
    £
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  11. Reward no longer available

    Pledge £175 or more About $219

    Aergrind Hausgrind Black Aluminium

    One for home and one for away.
    1x Black Aluminium Hausgrind (machined, black anodized aluminium body ; 316 stainless steel core, shaft and fittings; enamel dial; black steel burrset).
    1 x black Aergrind, 1 x Aerdisc.
    Save £68 on hausgrind + Aergrind combined rrp inc taxes
    extras valued at £6 rrp

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    Ships to Anywhere in the world
    Reward no longer available 0 backers
    £
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  12. Select this reward

    Pledge £175 or more About $219

    Aergrind Hausgrind Walnut closeout

    One for home and one for away.
    1x Walnut Hausgrind (turned, solid walnut knob and body with alu liner; 316 stainless steel core, shaft and fittings; enamel dial; black steel burrset).
    1 x black Aergrind, 1 x Aerdisc.
    Save £78 on hausgrind + Aergrind combined rrp inc taxes
    extras valued at £6 rrp

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    Limited 12 backers
    £
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  13. Reward no longer available

    Pledge £225 or more About $282

    Aergrind Cafe 5 pack

    a 5 pack of black Aergrinds for those who have lots of friends or who might want to retail a few Aergrinds in their cafe.
    RRP £425, save £200
    NB standard black only

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    Reward no longer available 11 backers
    £
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  14. Reward no longer available

    Pledge £420 or more About $526

    Aergrind Roaster 10 pack

    10 black aergrinds for roastery or large cafe retail sales.
    or very big families.
    RRP £850, save £430
    NB standard black only

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    Reward no longer available 1 backer
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  15. Reward no longer available

    Pledge £800 or more About $1,002

    Aergrind Mini Chain 20 pack

    the big pack - 20 black Aergrinds for retail through a micro chain, a large roastery etc.
    Or maybe you're just an avid collector. We don't judge.
    RRP £1700, save £900
    NB standard black only

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    Reward no longer available 6 backers
    £
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Funding period

- (28 days)