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View Thread » BUILDING A ROASTER » Bread Machine Roasters
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Built a Breadmachine Roaster
My husband and I built a bread machine roaster, using an old Breadman brand from Goodwill, and a heat gun. He does the electrical and design, and I do the grunt-work and give advice as I do much of the reading/research for this project.

These are the modifications so far:

Disconnected the electronics and connected a simple on-off switch
Took out the BM heating element
Replaced the Teflon-aluminum pot with a stainless steel restaurant canister and lid (cheaper than what could be had at Goodwill, BTW)
Sandblasted the Teflon off of the mixing paddle
Cut 2 holes in the lid, added a stainless steel tube to bring the hot air down to the bean level
Added an adjustable connecting collar to support the heat gun on the tube at an angle

So far, this is working out pretty good. Roasts of 8 oz. finish to Full City in about 15 minutes, although I could turn up the heat and do it faster, but I think I have been reading that that isn't necessarily a good idea.

We will be adding a thermometer/thermocouple here soon, to get a better idea of what is going on in there. Right now I shine a light into the exhaust hole and check the roast every minute, or even half minute, as the roast is browning. Since the addition of the support for the heat gun, now I can write my notes, use the flashlight, using both hands.

The beans fly around inside so much, I wonder if these bread machines are more like air roasters, but slower, more controllable.

An idea which failed: protecting the air intake holes on the heat gun with window screen so the chaff couldn't get sucked into the gun. It slowed the air down to the point where I had a 40 minute bean-bake. Probably didn't do the heat gun any good, either. The beans smelled awful in a few days, huge difference.

I will post pictures soon.

Looking forward to the pics. Did you do the sandblasting yourself?
Hi Tom, my husband has access to a sandblaster at work. Otherwise I would have used sandpaper. Hopefully this picture will post ok, we are having a lot of trouble making pictures small enough to post.

do send John Despres a picture of your roaster so he can make a banner. we roate the member roasters, mods on the forum top.


Please visit the Homeroasters Forum How To section here:
Finally I have found out how to make my pictures small enough to post. Thanks to Ginny and John for their help!

Attached should be the bread machine in its current configuration, with heat gun being supported mostly by the metal tube. Also that keeps the heat gun plastic out of the hot pot.
MarthaG attached the following image:
Hi Martha, nice looking rig! Sounds like you've got the majority of the modding accomplished and are in control of this baby. Great work! Let us know how the coffee's tasting and shoot us any questions that come to mind.

1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
John Despres
Nice!! Thanks for posting.

Looking forward to the roast reports!

Edited by John Despres on 11/24/2012 19:28
Respect the bean.
John Despres
Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
Thanks Allen and John,
Well the roasting is going along pretty well, but I look forward to adding the thermocouple gizmo. My husband says it is all ready for me to drill the hole in the lid, but with Thanksgiving and house guests all that got put off. Maybe this week we will put it in, then I suspect husband will want to hook it up to a laptop so we can watch a graph in progress. He loves all technology.

My roasts have been ok lately, always too many variables changing to really know what is going on. I have about 10 types of single origin beans I use. Some beans go from 1st crack rapidly to second, some never start is so hard to hear second crack with the heat gun and the bread machine going. But at least the roasts are far better than what I got out of the wok on the beer-making burner. I figure now if I can get the beans to Full City then out of there before Vienna, it is a success!

I'll post a picture of the roaster actually in use on the patio.
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04/23/2014 06:44
markyoung welcome2 and thanks fro joining us Mark...

04/22/2014 19:07
m@@ Howdy! coffee drink

04/22/2014 14:28
welcome cup albertalvarez2222 Thanks for joining!

John Despres
04/21/2014 17:50

04/21/2014 16:06
Big Welcome to our parade of new members! welcome to forum

04/21/2014 16:02
Welcome reedje777 thanks for joining!

04/21/2014 16:00
Welcome to Homeroasters polaris_ua enjoy the forums! pouring

04/21/2014 15:58
welcome2 BenKeith to Homeroasters!

04/21/2014 08:07
Noctorous Welcome thanks for joining us...

04/21/2014 08:06
Avyossii Welcome enjoy...

04/20/2014 19:47
JasonMck Welcome! BBQ grill

04/20/2014 16:20
Hey Jack, Yep, 25a double SSR as seen here: http://img829.ima.

04/20/2014 16:13
@Lylabrown Was it the 25A SSR?

04/20/2014 14:31
Nice banner for Spring/Easter Ginny ^

04/20/2014 13:34
Hey Allen, the brand is "111ager" sold by Auberins. It is well pasted+screwed to metal chassy, which never got beyond warm. Roaster was fused with 20a buss + 20a thermofuse, neither blew.