DIY Cooling / Stirring

Bullet R1 Hacks
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I built this recently, took a lot of iterations, but it works very well. Now, its all 3D printed, but I took a few precautions. Given the heat, for the stirrer, I used a filament that has a heat deflection upwards of 205 celsius (PA6-CF). In addition to that I coated it in three layers of epoxy (FDA Food Safe Grade). Happy to answer any questions, help with a build etc. If you have interest beyond that, drop me a private DM on here please.

A few things I’ve noticed using this, in addition to cooling the beans much faster, it also eliminates A LOT more chaff. I’ve very happy with this addition.

Hopefully I can help some of you out as well. Here are some pics, and a few videos showing it in action.

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13 Likes
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Very nice! Looks 100% professional.
Do you plan to make it for sale, or at least share the plans?

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I’m considering selling for those who don’t have the capability to 3D print, I know I can’t do it on here, so I need to work it out. If you have interest in buying let me know so I can gauge interest to see if it’s worth my time to put a site together.

I would say for now, drop me a DM me if you have the ability to build yourself.

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It looks like it works great and I love that the stirrer stays in the cooling bowl. I would be very interested in building this if you have a sharable material list and the stl files.

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@localrootscoffee

Have a look at this, let me know if you have any questions, or if something seems unclear.

1 Like
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FWIW, Amazon.com: StirMATE Automatic Pot Stirrer GEN 3- Variable Speed, Self-Adjusting, Powerful, Cordless, (Updated 2024): Home & Kitchen plus this Amazon.com: StirMATE OMNI-XL Stainless Steel Stirrer attachment for up to 5-Gallon pots. (Updated Nov 2024) : Industrial & Scientific was suggested to me by @billc and it works really well. Look for his post with a picture of this setup. Might not be as elegant as the design from @dustin.b but it works the same :slight_smile:

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This is outstanding — I am going to get started on printing the 3D files now and report back.

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I will tell you it will cost you a lot less than the StirMate, provided you have the resources to build one.

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provided you have the resources to build one

That the key right? I don’t have the resources to build one :slight_smile:

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Happy to help you out if you’d like to build one. Drop me a DM.

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Thanks for the offer. I’m good with the solution using the Stirmate setup - been using it for a year now with my 1kg batches. However, your design is a nice and sleek :slight_smile:

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if its cheaper than a stirmate I’m interested for sure. looks cool and functional.

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FWIW I quoted a few different prints on Shapeways (I don’t have a printer of my own) and the minimum for the printed parts seems to be about US $54, with 15% ABS as the print material. I’m guessing this doesn’t include shipping costs.

Maybe there are less expensive services? If you had your own printer it seems like this would be pretty economical.

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Printing yourself is significantly less than 3D printing services.

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I’m happy to print stuff for the cost of materials and shipping. I have a couple 3d printers; just shoot me a note.

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I am too, I didn’t mention it as I didn’t want to appear to be selling something. I’ve gotten kicked out of other forums for offering similar services.

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Dustin, This looks very well thought out. Great job.

The only problem that I see is the expense of ordering the hardware from McMaster-Carr. They typically don’t sell just 1 or two screws, you have to order 60 (or more) of them. (I’ve done this before, lol)

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And you have 15 items from McMaster-Carr in your BOM

Have you thought about putting together hardware kits for sale?

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I’m happy to do that! I have so many parts here. I could also modify the file to use plastic cutting screws instead.

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I would be interested in a hardware parts kit. DM me at your convenience with more details and a price.

My printer is currently in storage. I’ll have to dig it out and try printing with some of the PA6-CF. I have an enclosed printer so that should help maintain the temperature for the print process.
I also have the capabilities to modify the files.

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Let me look into this tomorrow and I’ll drop you a message.