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

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Another electric 1kg roaster
danst	#26 Posted on 07/10/2020 2:59 AM
1/4 Pounder Posts: 65 Joined: April 18, 2013	After some time I had a minor problem. The bearings were fast seized. The loud creaking tones were very unpleasant. I found, the problem is on the inner envelope on balls (there are 2 shields on every side) - a black layer on inner metal shield that crumbles with heat and causes the problem. I removed the shields with this layer and leaved only 1 metal shield towards the roaster?s body , the exterior site leaved open, for better cooling and greasing. 1000g Ugly roaster, QM Alexia EVO, Bezzera BZ09, Niche Zero, Fiorenzato Doge 63, Mazzer Jolly(Mestre), Handground, T. Moccamaster, Aeropress.


AlexMunt	#27 Posted on 07/19/2020 4:49 AM
Newbie Posts: 9 Joined: February 01, 2019	Very impresive work Danst, the first roaster and the second! And all the improvements you have made. I`m working on a similar project, building my own roaster, allmost the same size:220 x 220 mm drum, stainless steel 4mm not perforated, electric heat, 2,5KW, controled by TC+ Arduino kit and Artizan. Thanks to Homeroasters.org for all, information, forum, comments, etc. I used a lot of information from here. I have a question about a detail on how do you managed the thermal insulation. The silicone used to seal the walls on your roaster, is thermal resistent? Can you tell me some brand you have used, or name ? Thanks. Edited by AlexMunt on 07/19/2020 12:12 PM


renatoa	#28 Posted on 07/19/2020 6:00 AM
Administrator Posts: 3005 Joined: September 30, 2016	120x120 CM ? Maybe machine footprint... If related to drum size, and was an units typo, you meant "mm", then it's too small, means 1.357 litres, good for maximum 250 grams. The closest figure good for 1 kg drum is 12x12 inches.


AlexMunt	#29 Posted on 07/19/2020 12:10 PM
Newbie Posts: 9 Joined: February 01, 2019	Sory, it was my error in writing. I have made the correction in my post. 220x 220mm the correct dimention. The footprint, like you have mentioned, is 120x40 cm more closer than the drum. :) Thanks for the Note renatoa!


allenb	#30 Posted on 07/19/2020 5:21 PM
Administrator Posts: 3858 Joined: February 23, 2010	Hi Alex, In the interest of keeping individual build threads devoted to the original poster's project, it's best to PM the OP with any questions related to ones own build otherwise, a longer than desired set of back and forth's typically happen sidetracking the OP's thread off course. But, please start a thread on your build so we can lend a hand and many will want to see it's progress. And, post lots of photos! 1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana


danst	#31 Posted on 07/22/2020 7:00 AM
1/4 Pounder Posts: 65 Joined: April 18, 2013	The right answer is : with this 8.6x7.4 inch drum I have made some 1200g roasts, with no problems. But I feel, it is the maximum, on the rear perforated plate start some smallest / broken grains to fall out. I believe with 2.5kW power it is possible to make 1kg roasts only very slow or with higher preheating temps and with more risk of scorching and ashy flavours. The electric roaster with solid drum has the same needs on power as gas roasters. On the next change, when the heating is gone (I don?t know when), I make surely 4.5 - 5 kW heating. Depending on power square load on tubular elements. 1000g Ugly roaster, QM Alexia EVO, Bezzera BZ09, Niche Zero, Fiorenzato Doge 63, Mazzer Jolly(Mestre), Handground, T. Moccamaster, Aeropress.

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