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Please don’t soak your grinder in water, or wash it in the dishwasher - it isn’t dishwasher safe. This could damage the wooden veneer and the ball-bearing cartridges in the long term.

BODY

• Your C40 grinder is a robust piece of kit, but of course it’s good to take care of it too. If you own a Nitro Blade® grinder with a wooden veneer, then we recommend avoiding scratches and keeping it dry. If it gets dirty, then a damp cotton cloth is enough, and we would recommend drying it immediately.
• You can care for the wood with a good, natural beeswax polish, like the one in our Wood Care Balm Set.
  
  

BURR

• We recommend simply brushing your burr and grinder interior clean. Our Comandante Brushes can help you with that, and it’s also easier if you disassemble your grinder first (see General Use, below).
• You can also blow coffee dust out of hard-to-reach areas using compressed air, a camera lens blower or good old lung-power!
• Important for Ironheart® owners: 
  please don’t use water to clean your burrs, the carbon steel isn’t stainless and should be looked after carefully.

• The easiest way is to disassemble your grinder (see General Use, below) and brush all parts clear of coffee dust using one of our Comandante Brushes. 
• You can also blow coffee dust out of hard-to-reach areas using compressed air, a camera lens blower or good old lung-power!
• X25 TRAILMASTER® is not dishwasher safe, because over time this could damage the ball-bearing cartridges. You can, however, rinse it with water and even use gentle, natural detergents if you would like to. If you do, we strongly recommend disassembling the grinder to allow the moving parts to dry. (This avoids an unnecessary build up of coffee dust).

• Thanks to Nitro Blade®’s highly inert surface, you can afford to relax. There’s no need to clean your burrs between uses! Once a week (heavy use) or month (light use) is more than enough. We recommend simply using a clean bean jar each time to keep your dose of ground coffee as fresh as possible.
• We nevertheless recommend regular cleaning of the burrs and interior to keep your grinder running smoothly and your coffee tasting fresh! You should find the right balance for you. After all, if you’re too busy stressing about the cleanliness of your equipment you might not be able to enjoy your coffee at all!
• Important for C40 Ironheart® owners: it’s important to keep your burrs dry and we would recommend cleaning your burrs with our Burr Care Set on a weekly basis if you’re using your grinder on a daily basis.
• It only takes a couple of minutes - see how in our Cleaning Video.

KNOB

• Your wooden knob has a simple push button closure in it. You can simply pull it off the crank, and push it back on - when it clicks it is correctly attached.

CRANK

• The crank attaches to the axle thanks to a small magnet. Simply pull the crank away from the body. It helps if you hold the crank near the lid.

BURR

• Important for the C40 grinder: please don’t unscrew the three mounting screws around the burr. These have been carefully and precisely tightened by hand during production to ensure the correct calibration of your grinder. Undoing them can damage your grinder and void warranty.
• You can watch our Disassembly and Reassembly Video, or read the instructions below …
• Disassembly: To remove the conical burr, simply unscrew the 3-pointed grind setting dial all the way.
  - Be careful to hold onto the dial and the burr, so that you don’t lose anything!
  - We recommend disassembling your grinder above a table or similar flat surface.
• You can remove the cone, spring, washers and axle - for cleaning, for example.
• Reassembly: it is important to reassemble the axle and washers correctly.
  - The top washer should be inserted before the axle, with the raised edge towards the bearing.
  - Attach the crank to help hold everything in place.
  - Insert the bottom washer onto the axle, with the raised edge facing towards the bearing.
  - With the spring reinserted into the cone, slide the cone back onto the axle.
  - Whilst pushing the cone into the body of the grinder, screw the grind setting dial back onto the axle.

• The red O-ring is a non-essential feature, designed to hold the lower washer in place during disassembly.
• Note: the red o-ring is no longer installed in any of the latest production models. We found that the grinders worked better without it. If your grinder didn’t come with one, there’s nothing to worry about!
• If you would prefer to keep your O-ring, then see the drawing below - it belongs between the washer and the spring.

The ‘right’ grind setting depends on your personal preference and recipe, and of course it also varies from coffee to coffee. With all other variables fixed, grind finer to increase extraction or coarser to decrease it. Here are some goodstarting pointsfor you, butplease trust your tastebuds and dial in to suit your grinder, your coffee and your preference:

• 3-8 Clicks for Ibrik
• 7-13 Clicks for Espresso
• 14-20 Clicks for a Bialetti or stovetop coffee pot
• 18-35 Clicks for a pour over filter coffee (depending on dose and brewer)
• 25-35 Clicks for Cupping and French Press
• Aeropress? Well, that depends on your recipe ;)!

Hold your grinder horizontally. When the burrs are open, the handle will turn and fall down to the 6 o’clock position. Whilst gradually closing the burrs / tightening the grind, click zero is the first available setting where the handle no longer falls (from 9 o’clock, for example). The burrs hold the handle still. (If you tighten the burrs even further than this, you are going to click -1, -2, etc., so to speak., so from zero you only need to open the burrs). As you open the burr from point zero, you can count the number of clicks to track your grind setting.

Yes!

We have developed a range of care products and also optional extras to help you customise your grinder for you. Contact your local Comandante dealer to find out more:

BRUSHES

Our range of Barista Brushes are made of 100% natural wood and hair. We have a range of different brushes to help you keep your coffee bar and equipment clean. There’s even a beard brush ;)

KNOBS

It’s now possible to customise your grinder with our expanded range of different knobs in our standard size (44mm diameter) or ‘Big Joe’ size (55mm). They are all made of 100% natural wood, and you can simply swap them over whenever you want to! (See General Use; Disassembly)

BAGS

Want to take your grinder with you? No problem, we have some bags for that! See the ‘Products’ section of our site for more information.

BEAN JARS

Every C40 grinder comes with two Bean Jars (one glass and one polymer for the best of both worlds), but having some extras can be a great help! You can get extra glass jars individually or in 4-packs, and extra Polymer Bean Jars individually. The Polymer Bean Jars are uniform in weight, making them ideal for pre-portioning your doses of beans at home, for on the road, for on bar, or for competitions.

The C40 Ironheart was first produced in 2017 in a limited quantity. Our Ironheart burr set uses a super hard Carbon Steel. Its performance is exceptional, but it requires care because it isn’t stainless. We therefore decided to focus our energy on producing our renowned NITRO BLADE®burrs, which provide world class grind performance in a very low-maintenance format.

We design and build our grinders to last. That means that we don’t expect the grinder just to break through normal use. If something goes wrong, contact your local dealer or contact us directly. Comandante will take care of you!

BURR

Your NITRO BLADE® burr is extremely hard. We developed our own very special high-nitrogen alloy to ensure that your burr will last a lifetime.

Yes, of course! If anything gets lost or goes wrong, please contact your local dealer or contact us directly.We produce long lasting and repairable grinders with the goal of reducing their environmental impact over time. Our planet doesn’t deserve product obsolescence, which is why we also offer our Comandante Repair Service in case of accidents. Please contact our Customer Support Team for more information.

We produce long lasting and repairable grinders with the goal of reducing their environmental impact over time. Our planet doesn’t deserve product obsolescence, which is why we also offer our Comandante Repair Service in case of accidents. Please contact our Customer Support Team for more information.

This can happen because we use 100% natural wood for our handles / knobs. Sometimes the wood can squeak in contact with the crank, but this is easy to fix! Simply remove the knob from the crank, then lubricate the crank or the inside of the oak knob. You can use a natural mineral oil like the one in our Burr Care Set or simply olive oil. Then reattach the knob to the crank (push until it clicks), and your problem should be solved!

The connection between crank and the wooden knob is a simple push-click button. When reassembling the knob, push until it clicks.

If this doesn’t fix your problem, we are here to help! Contact us.

Coffee beans have an organic structure, and roasted coffee is brittle. This means that coffee always breaks and shatters unevenly during the grinding process, creating both a super fine dust or ‘fines’, and - at medium or coarser grind sizes - irregular larger shapes or ‘boulders’. Both are inevitable. The question is how well a grinder can reduce them to levels that contribute positively to the extraction and flavour, rather than negatively.

We design, develop and test our burr sets in our Laboratory at Comandante HQ. By looking at the particle distribution of ground coffee we can purposefully analyse and make sure that the grind performance of our burrs is optimised for brewing high quality coffees.

Don’t be scared if you see some fines or boulders in your coffee grounds. This is normal, and you can be certain that your Comandante burr set produces a fantastic particle distribution to help you get the best out of your coffee. All you need to do is check that your grinder is correctly assembled, clean, and then find the grind setting and recipe that tastes best to you!

It is normal for your Nitro Blade burrs to have some contact at finer settings. The cone burr in the middle has been built as a “floating cone”. This is a deliberate design with performance advantages. Unlike some other grinders, the cone has flexibility on the axle. Without load (when the grinder is empty) you are able to move the cone on the axle, and it may sit ever so slightly off-centre due to the spring. But don’t worry: as soon as you grind coffee, the cone follows the centricity of the axle and the burr ring. We have tested this very carefully in our laboratory!

It is normal for your Nitro Blade burrs to have some contact at finer settings. The cone burr in the middle has been built as a “floating cone”. This is a deliberate design with performance advantages. Unlike some other grinders, the cone has flexibility on the axle. Without load (when the grinder is empty) you are able to move the cone on the axle. But don’t worry: as soon as you grind coffee, the cone follows the centricity of the axle and the burr ring. Rest assured that we have carefully aligned and calibrated the outer burr ring with the axle of the grinder at Comandante HQ with the aid of the three custom mounting screws on the bottom of the grinder. (Please do not adjust or remove these!)

Your burrs won’t damage each other. This can depend on how the burr cone is sitting on the spring, and also how clean your grinder is. (If your grinder has collected a load of coffee dust over time, it’s probably worth cleaning your grinder! See the cleaning section above).

We have tested this very carefully in our laboratory, and the grind performance of this design and with our burrs will help you brew many delicious coffees!

Yes, the loose connection between the crank and the axle is actually a deliberate and very important design feature, so you have nothing to worry about :).

The loose connection is necessary to ensure that it is easy to remove and reattach the crank and lid. If it was tighter, then this would be more difficult. (We tested this during the design process to find the perfect fit!)

The ‘loose’ connection has absolutely no effect on the axle and the burr mechanism. And certainly no effect on grind performance. There is only a positive effect on how easy it is to use the grinder!

Check our video guide. If you’re still having problems after this please contact our Support Team!