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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Drum Roasters

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Is my math right?
kwrcst	#1 Posted on 12/16/2018 11:20 AM
1/4 Pounder Posts: 75 Joined: November 26, 2018	So my inner drum is 8.5? across and 6.5? deep. I?d roast volume in oz =cu.in/10, am I only getting 11.74oz in this thing?


BobbyS	#2 Posted on 12/16/2018 1:22 PM
1/4 Pounder Posts: 179 Joined: July 02, 2011	Mill City 1kg roaster drum is 8.75 x 7.5 in. Also in the specs they show the batch size .2 - 1.5 kg Volume will be dependent too on how your vanes and drum internals are constructed. More stuff inside, less beans. 8.5 dia. X 6.5 length = bean volume should be around 36.88 oz. Which I believe is ~1 kg Edited by BobbyS on 12/16/2018 2:08 PM


renatoa	#3 Posted on 12/16/2018 1:29 PM
Administrator Posts: 2409 Joined: September 30, 2016	Translated to metric system... 21.6 cm dia * 16.5 cm len = 6 liters, that equates to 1 kg according to some sources, and my experience too. Close to 20 cm dia * 20 cm len (8x8"), the drum size of some commercial 1 kg roasters. So your 326 grams math is heavily under-evaluated ...

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