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Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Building a Coffee Roaster

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inexpensive food-safe wire mesh?
bvwelch	#1 Posted on 02/08/2010 1:31 PM
1 1/2 Pounder Posts: 1064 Joined: December 27, 2007	Greetings, I'm doing a mod to my popper, and I want to add a 'false bottom' in the heat chamber, made of wire mesh. The idea, borrowed from someone at Home-Barista, is to raise the level of the beans up, away from the bottom of the heat chamber. Beneath the false bottom, is a nice place to insert a probe for the incoming hot air temperature, only. My wife donated a grease splatter guard, which works, but is way too fine, and I think it is restricting the air flow more than necessary. Thanks for any suggestions, Bill Edited by bvwelch on 02/08/2010 1:32 PM


seedlings	#2 Posted on 02/08/2010 2:07 PM
1 1/2 Pounder Posts: 4226 Joined: June 27, 2007	You should be able to "form" some 1/4" hardware cloth into the proper bowl shape. CHAD Roaster: CoffeeAir II 2# DIY air roaster Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover


nufsaid	#3 Posted on 02/08/2010 3:46 PM
Newbie Posts: 21 Joined: November 16, 2009	if you live in the boonies your local hardware/farm co-op will have 1/4" mesh chicken wire, I use it to make rotissery drums.


bvwelch	#4 Posted on 02/08/2010 4:35 PM
1 1/2 Pounder Posts: 1064 Joined: December 27, 2007	Thanks Gerry, I wonder if a peaberry would fall thru? Also, would that be galvanized wire? thanks


bvwelch	#5 Posted on 02/08/2010 4:38 PM
1 1/2 Pounder Posts: 1064 Joined: December 27, 2007	Quote seedlings wrote: You should be able to "form" some 1/4" hardware cloth into the proper bowl shape. CHAD You've piqued my interest: 1) bowl shape? I was just thinking a flat surface, but bowl-shape sounds interesting, tell me more. 2) hardware cloth - not sure what to ask for, or where? Stainless steel I guess? thanks!


John Despres	#6 Posted on 02/08/2010 4:51 PM
Administrator Posts: 2221 Joined: January 09, 2008	I think most hardware cloth is galvanized. Be careful. John Respect the bean. John Despres Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
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bvwelch	#7 Posted on 02/08/2010 5:21 PM
1 1/2 Pounder Posts: 1064 Joined: December 27, 2007	That's why I've been cruising the kitchen-gadget aisles in stores :-)


Unta	#8 Posted on 02/08/2010 5:58 PM
1 1/2 Pounder Posts: 788 Joined: January 26, 2010	stainless steel colander.. pricey but already a bowl shape. there is also ornamental aluminum fireplace grate that comes in sheet form at any home depot, popcorn kernals wont fall through the holes, so it is small enough for most any beans.. Sean Harrington educate.
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endlesscycles	#9 Posted on 02/08/2010 6:05 PM
Pounder Posts: 420 Joined: April 11, 2009	At what temperature does galvanization become nasty? -Marshall Hance Asheville, NC


John Despres	#10 Posted on 02/08/2010 7:10 PM
Administrator Posts: 2221 Joined: January 09, 2008	Since zinc and lead are part of it and considered a heavy metals, I'm not sure there's a safe temperature. Everywhere I look online says NO! to galvanized use with food prep John Respect the bean. John Despres Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
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Koffee Kosmo	#11 Posted on 02/08/2010 9:35 PM
Administrator Posts: 1620 Joined: December 31, 2008	If you lived close I would give you some carbon steel perforated plate If you are going to cut a kitchen steamer insert it would be prudent to search at a yard sale or second hand shop KK I home roast and I like it. Designer of the KKTO Roaster Build information https://homeroast...ad_id=1142 https://docs.goog...lide=id.i0 Blog - http://koffeekosm...gspot.com/ Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex, (KKTO) Turbo Oven Home Roaster.
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seedlings	#12 Posted on 02/09/2010 7:51 AM
1 1/2 Pounder Posts: 4226 Joined: June 27, 2007	Quote John Despres wrote: I think most hardware cloth is galvanized. Be careful. John Perhaps I misunderstood, but isn't this for the cold air inlet? If so, there won't be any issue at room temperatures... Do we need to put warning signs on chain-link fences? CHAD Edited by seedlings on 02/09/2010 7:54 AM Roaster: CoffeeAir II 2# DIY air roaster Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover


bvwelch	#13 Posted on 02/09/2010 8:00 AM
1 1/2 Pounder Posts: 1064 Joined: December 27, 2007	Thanks for all of the great ideas, and I'm sorry I didn't make myself more clear. This mesh goes directly inside the roasting chamber of the popper. I'll try and do a drawing later. But if you had a side view, and loaded the greens into this new modified popper, but did not turn on the power yet, you would see the beans resting on this 'false bottom' of mesh, with an inch or two below the mesh, where you could mount a TC probe, in order to measure the hot air 'environment'. I'm actually gonna give up on this mod for now, and come back to it later I think. -bill


Ringo	#14 Posted on 02/09/2010 3:56 PM
Pounder Posts: 474 Joined: January 14, 2010	You can remove galvanize with a spray of muratic acid. Get muratic acid at a pool supply store. Be carefull with it, it will really burn.


Hamilton	#15 Posted on 02/09/2010 5:03 PM
1/4 Pounder Posts: 76 Joined: November 09, 2009	Quote endlesscycles wrote: At what temperature does galvanization become nasty? I did some reading about this because my first chamber was galvanized. From what I can tell there are issues welding galvanized (~1000F or more) but the issues are not long term or toxic, they can just make you sick. I don't think our temperatures are high enough to create noxious fumes, but I went to aluminum just to be safe. If you're actually selling coffee/food items, the gov't seems to want stainless for everything anyhow. This is a tiny blurb about zinc oxide gas: http://en.wikiped...ide#Safety


John Despres	#16 Posted on 02/09/2010 8:12 PM
Administrator Posts: 2221 Joined: January 09, 2008	Pretty much everything I've looked at suggests it's a bad idea to heat galvanized metal while in contact with food regardless of temperature. I did not find one site anywhere indicating cooking food on a galvanized surface is OK. Cold prep is OK, it seems. Not cooking... Let's just stay safe, shall we? John Respect the bean. John Despres Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
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seedlings	#17 Posted on 02/09/2010 9:50 PM
1 1/2 Pounder Posts: 4226 Joined: June 27, 2007	Quote bvwelch wrote: Thanks for all of the great ideas, and I'm sorry I didn't make myself more clear. This mesh goes directly inside the roasting chamber of the popper. I'll try and do a drawing later. But if you had a side view, and loaded the greens into this new modified popper, but did not turn on the power yet, you would see the beans resting on this 'false bottom' of mesh, with an inch or two below the mesh, where you could mount a TC probe, in order to measure the hot air 'environment'. I'm actually gonna give up on this mod for now, and come back to it later I think. -bill Aaaaahh. I understand. In this case don't use galvanized. CHAD Roaster: CoffeeAir II 2# DIY air roaster Grinder: Vintage Grindmaster 500 Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover


nufsaid	#18 Posted on 02/09/2010 10:11 PM
Newbie Posts: 21 Joined: November 16, 2009	peaberry definitely can go thru. I double layer it with one layer offset by 1/8" Costs a whole buck.


Dan	#19 Posted on 02/12/2010 12:12 PM
1 1/2 Pounder Posts: 1662 Joined: October 24, 2005	This topic comes up on a regular basis. The temperatures we roast at are not enough to create zinc fumes, as in welding, so that's not an issue. Zinc is not allowed in commericial food process equipment, but then it IS allowed in plumbing for drinking water. When roasting we don't have much moisture or acids to speak of, so reactivity isn't an issue. Frankly, I don't see a problem. I use galvanized hardware cloth for my cooling tray. Still, its easy enough to go food-safe. Just buy a coarse kitchen sieve (strainer/sifter). It is cheap, SS and already in a bowl shape. Dan
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Ringo	#20 Posted on 02/15/2010 7:53 PM
Pounder Posts: 474 Joined: January 14, 2010	Are you still looking for food safe mesh, I bought these disk from this I have them now. I will be using mine in my bean cooler. Nice and thick carbon steel, but will not bend. mhttp://cgi.ebay.com/Perforated-Metal-steel-discs-LIVE-STEAM_W0QQitemZ170446930531QQcmdZViewItemQQptZModel_RR_Trains?hash=item27af6dc263an,


bvwelch	#21 Posted on 02/15/2010 9:59 PM
1 1/2 Pounder Posts: 1064 Joined: December 27, 2007	Ringo, those look neat, but I've decided against that modification for now. thanks!


jimcro55	#22 Posted on 05/19/2010 11:00 AM
Newbie Posts: 5 Joined: April 29, 2010	If you need a full stock list of wire mesh or some samples, go here... http://www.bwire.com/ They have the best prices and can provide you with the best service. I used them to make my own BBQ 2 years back, and they were real helpful.


dazarooney	#23 Posted on 12/23/2010 4:11 PM
Newbie Posts: 1 Joined: December 23, 2010	If you need some wire mesh you can try here: wire mesh


danw2002	#24 Posted on 06/15/2011 10:44 PM
1/4 Pounder Posts: 73 Joined: June 12, 2011	i know i am a bit late to the party, but you got to jump in sometime. why not just get a food wire strainer, and cut what you need from it, very cheep to do and safe. you could even just make it shaped like a cup and invert it, so you can just use it as you need to and take it out any time. not sure why you want to do this, i can do up to 5.5oz in my popper and get perfect results. moving to a BM/HG set up, as i have all the parts already and am good with electrical...more on that later.


ginny	#25 Posted on 06/16/2011 7:19 AM
Founder Posts: 3476 Joined: October 24, 2005	Tons of kitchen steamer trays are available. They type that fit into the bottom of a pan and it has little legs, cut one the size you want, weld a little ring around it the height you want and bingo! g

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