Designing My Own Cocoa Grinder

I have been searching for suitable cocoa nib grinder for years but never found any. What I mean suitable is it should pass food hygiene standards and should be affordable too. Many have passed the first criteria but not the second. All of them are so expensive maybe because of high quality construction, design patents and the cost of shipping which is almost half of the item price. Not to mention  the added tax and profit by all handlers.

The most affordable electric mill in market is the Baesa Corn Mill attached to a 0.5 HP capacitor start monitor.  Having the auger and grinding plate turned by a motor is great. It made operation faster and better. However, it has many limitations. It is not made for a motorized operation. It creates so much noise when running  and have a short expected service life. It is a cast iron construction so prone to rust build up in moist environment. And, it is not easy to clean.

There are locally available electric grinders. Take a walk along Raon, Binondo and Divisoria and you’ll sure find few. The types made for motorized operation. They are made of iron casting with hardened steel burrs. They are good for grinding corn, rice, coffee and other dry commodities but for for wet cacao milling, also not for peanut butter manufacture. The desired fineness could not be achieved with rough toothed burrs.

If fine grind is of concern then mill equipped with grinding stone maybe a better choice. However, stones absorb liquid materials. Can you imagine how hard it is to remove cocoa oil and solids from the rough stone surfaces. How about those that sank in. The stones may wear out rapidly depending on gap setting. All the worn particles are gonna end up mixed with the food.

For hygienic purposes, all the surfaces that comes in contact with food should be made of stainless steel, preferably high grade stainless steel. The material looks clean, relatively easy to clean and looks very neat even with minimal maintenance. The material is expensive but likely to last very long. Grinders made of this material are way more expensive and I am looking for ways to made one locally. I created a crude 3d design after few days of learning CAD. I hope the cost of local fabrication is within reach.

partial view of cocoa mill cad drawing



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  • Dear Marvin,
    Can you send me the cad data? I’m an engineering student from germany and i need them for a project (we have to design a conical burr grinder). Thanks in advance.

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