Print Thread
My project drum roaster
seehad
First off, I have already received a great deal of help in my brief history on this forum. Thanks

On to my project
I'm still working on a drawing I can share but in the mean time I am still in the process of securing the parts necessary. The basic idea is to construct a 5.5" x 12" stainless steel drum for use in a PC case. Using craigslist I found a local fabricator willing to bend a sheet of perforated stainless steel into a cylinder for $30. I could just pop rivet it on the seam and on the end caps. The case will be lined with ceramic tiles to hold the heat in. I will salvage a gas burner from a gas grill and lay perforated ceramic tiles above the flame to evenly distribute the heat. Thanks to Dan and Seedlings I found a 62RPM motor with more than enough torque for $12.95

First question: Does anybody have a secret supplier of perforated stainless steel? I'm waiting to hear back from a supplier in So Cal who thought they might have the size I'm looking for (20 gauge) at a mere $15. Onlinemetals has the same sheet for 60$. A local supplier had a 12x36" sheet for $150! Is 20 gauge a good size to make a drum?

2nd Question: Should I get a steel case computer case? Would the type of steel used in computer cases be bad getting hot? Should i go with an aluminum case instead?

I'm aiming to finalize my parts list this weekend
 
Dan
20 ga is probably what I use and it is OK. 5/32" holes seem to be optimal, imo.

Try:
http://www.mcmast...
http://www.mcnich...
Edited by seedlings on 02/05/2009 9:59 PM
 
qajariaq
Using a PC case is an interesting concept! I don't think the steel used is a problem (the old towers I have out in the garage are bare steel inside) but any plastic or painted parts will need to be removed as the exterior will likely get hot enough to melt/burn those. Doing this seems to leave a lot of holes, but I suppose you can orient it so that your fire bricks cover up the majority of them. I don't think aluminum is necessary, but an all-aluminum case would likely be anodized (and a lot more expensive if not second-hand/salvaged/etc) if you are concerned with appearances and the bare steel case isn't your style.

I'm interested to hear about these secret perf'ed stainless suppliers :P 20 gauge will be plenty heavy enough, you could probably go down to 24 or even 26 gauge in stainless. $15 for a 12 x 12 sheet of stainless is a steal.

I'll be interested to see how your build goes - I've got a couple of gutted micro towers in the garage that could easily be re-purposed as drum roasted housings. ThumbsUp
 
dja
try www.smallparts.com I think thats what the place is called.
they have stainless steel screen that you will not have to have rolled but can form by hand around a peice of pvc pipe that you will probably be able to find laying around some construction site.
Edited by seedlings on 02/05/2009 10:00 PM
I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
 
seehad
Woot! Just scored a 12" x 17" 20 gauge sheet of stainless steel for $32 shipped. My first piece is officially ordered
Edited by seehad on 02/05/2009 6:09 PM
 
Koffee Kosmo
I have a photo? the inside of a roaster drum
May help you out in your design with the vanes
KK
Koffee Kosmo attached the following image:
img_roastdruminner.jpg

Edited by Koffee Kosmo on 02/06/2009 8:45 PM
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
 
Koffee Kosmo
This the outside view of the drum showing the shaft

KK
Koffee Kosmo attached the following image:
img_roastdrum1.jpg

I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
 
seedlings
Why the solid drum, KK, instead of perf? Looks real nice, though!

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Koffee Kosmo
I found those images on the net Chad
I like the screw vanes
They will keep the beans on the front and push them out when a gate is opened


KK
Here is a similar drum but perforated and straight vanes
Koffee Kosmo attached the following image:
img_drumvein.jpg

I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
 
seehad
So this is a rough mock-up done in illustrator

redrockexposure.com/images/caseroastervector.jpg
 
Dan
A roaster in a computer? That brings a whole new meaning to Internet cafe! :)
 
seedlings
Awesome concept, seehad! Plus, it can work!

Did you decide on stainless or aluminum case? I don't think it matters which. Looks like ceramic tiles under the drum, and all that above the propane burner. This will be an excellent, compact roaster to be sure!

Oh, if you can fit one in a laptop case, I'll call Guiness Book of World Records myself!

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Koffee Kosmo
I am worried that you will be patching up many holes on the PC case to keep the heat from escaping
The inherent design is to let built up heat to escape


KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
 
seehad

Quote

Koffee Kosmo wrote:
I am worried that you will be patching up many holes on the PC case to keep the heat from escaping
The inherent design is to let built up heat to escape


This is true.
To address that issue, I will be covering holes with pieces of steel and the majority of the case will be lined with ceramic tiles.
 
Koffee Kosmo

Quote

seehad wrote:

Quote

Koffee Kosmo wrote:
I am worried that you will be patching up many holes on the PC case to keep the heat from escaping
The inherent design is to let built up heat to escape


This is true.
To address that issue, I will be covering holes with pieces of steel and the majority of the case will be lined with ceramic tiles.


Seehad
May I suggest a kiln repair medium
I remember using a product when repairing kilns at a steel plant
It was supplied in chunky powder form added water and basically used a trowel to apply

The reason I say this is that the glue you use to adhere the tiles may fail
also cement based grout will also fail from heat stress

KK
Edited by Koffee Kosmo on 02/10/2009 6:40 PM
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...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.
 
Jump to Forum: