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Home Brew Forums > Home Brewing Beer > DIY Projects > Fermenters > What size cone is needed for conical?
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Old 02-06-2013, 04:52 AM   #1
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Default What size cone is needed for conical?

I'm doing a conceptual design for homemade conical. My plan is to take an old pony keg (the taller/skinnier style) and fashion a stainless steel cone and TIG weld it to the bottom of the keg. Kind of like what yuri did, just with a smaller keg. This should give me ~8 gallons of fermenting space, depending on the cone.

My question is what is the slant height needed for proper yeast drop of a conical? This obviously would determine my perpendicular height. I figure I can plug the numbers in, run it through a 3 piece roller and butt weld the seam. From there I could tack on a dump valve and a drain valve.

As stated this is a concept idea. I got the keg, and a source for some stainless, and means of obtaining the tools. So I might run with it if I can get all the details hammered out.


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Old 02-06-2013, 05:10 AM   #2
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Proper angle is 60* for a conical fermenter.


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Old 02-06-2013, 06:19 AM   #3
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60 is indeed the standard. Theoretically, you could just have a cone if you wanted. It would make for a cool looking fermentor, if not particularly space-conscious.
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Old 02-06-2013, 04:54 PM   #4
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Yeah, a total cone would NOT be beneficial to me, I don't think it'd fit in my ferm chamber. Wow, I'm really going to have to sharpen up on my trig/geometry because I'm drawing a blank for the formula to calculate slant angle. Is 60 the minimal? Anything above 60 will work I'm guessing, within reason?
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Old 02-07-2013, 12:55 AM   #5
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After I roll the cone I plan on welding a nipple to the bottom so I can attach a 1 inch ball valve.
This will allow me to keep my cost down for now with a cheaper ball valve until I can afford a 3 piece sharpie ball valve


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