Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
You must login to post a message.

05/28/2023 6:19 PM
Laurierejoice Welcome

05/22/2023 1:38 AM
Icebreak, coffee drink ?

05/18/2023 8:23 AM
gvayll and TheGipsyRoaster Welcome

05/18/2023 1:23 AM
Gavin and L_To welcome to forum

05/16/2023 11:49 AM
Wsunate, glad you found us! Post often and have fun! woohoo

In Memory Of Ginny

Latest Donations
dmccallum - 10.00
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00
Users Online
Guests Online: 2

Members Online: 0

Total Members: 7,868
Newest Member: Laurierejoice

View Thread

Who is here? 1 guest(s)
 Print Thread
SCTO Max capacity
Can anyone recommend a max roast capacity for greens in an SCTO setup? Can more than 1/2 lb be roasted and controlled with an SCTO?


Kevin in NY
burnin' coffee
Hi Kevin,
Welcome to and thanks for posting.

Short answer: yes

Long answer:

The TO itself can handle well over a pound of coffee, perhaps even two.

It's the SC motor that is the limiting factor. It is quite weak and tends to stall and reverse directions when the going gets tough. This leads to the notorious "angel wings" formation with the beans just lying there while the stirring arm bats up against them first on one side and then the other. The beans stop moving and roast very unevenly.
Even so, some SC fans have reported batch sizes up to 12 and even 16 ounces, after modifications to the stirring arms, power shaft and plastic retaining nut.

There may be some replacement motors for the SC out there somewhere.
I have looked for them on the Net, but I didn't pursue it very far. They are only about 4 watts, should you want to go hunting.

FWIW, the blue Salton "UFO" has a stronger motor and is a good alternative.
Mine will do over a pound with only an occasional reversal. The newest model is black and is called the "Salton? Stirring Popcorn Popper & Nut Roaster"

I have not used one myself, but I know of folks that have roasted more than a pound with their SC/TO setup regularly. I believe Ed (a.k.a. farmroast) uses the TO as a top to his 1 kg roaster, although that is quite a bit more complex than the SC/TO.


Adding a band between the SC and the TO (with a port for chaff ejection) can increase the capacity ...


Hope this helps ...
Edited by seedlings on 06/19/2008 12:45 PM

Eddie Dove

The South Coast Coffee Roaster
vita non est vivere sed valere vita est
Home Coffee Roasting Blog and Reference
I just built one of these setups earlier this week. I used the springform cake pan to increase the height and capacity. However, the Stir Crazy motor is a weakling. I suppose you could try modifying the stirring blades, but I found with a one pound load, the motor really struggled, especially during the first part of the roast.

My roast was very uneven. Perhaps due to my in-experience controlling the TO temp, but I also think it may have been the whimpy stirrer motor.

I'm not sure what I'll do next-- perhaps move the TO to a bread machine platform.

There are several nice projects here you can reference-- with Stir Crazy, UFO, woks, etc.

Have fun!

Howdy, Kevin in NY!

Innovate! There's no limit to possibilities with the SC and TO. You can even attach the TO to something else... a breadmaker motor, perhaps? Have you experimented with your particular setup yet to see what it can do successfully? OR, are you still researching to see what devices tickle your fancy..? Keep us in the loop!

Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
Than you to everyone for the replies! I am going to build a modified SCTO. My primary goals is to affordably increase capacity over my faithful Gene Cafe. My wife and I consume more coffee than the 0.5# capacity of the GC.

I'll see if I can somehow swap the motor out for one with more torque. :(

Thanks again!
burnin' coffee
Just keep us all informed as to your burnin' coffee roaster experiments. Woo-hoo!

Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
The TO tops, especially the higher wattage (1440, 1470watts) Galloping Gourmet TOs are an excellent heat source for roasting coffee. The convection fan pushes the air down the sides and sucks it back up the middle. Much better heat application compared to a heat gun. It can easily roast 1.5 lbs. The Stir Crazy motors are too wimpy the reason I never tried one and went custom from the start. I first used a bread machine and a cut down stock pot that worked well while I built my DreamRoast with a conduction heater added below the pot and a commercial quality speed control drive motor. A TO with a custom stir drive are super roasters with a nice batch size but are a bit of work to build. Below is a pic of my original dumping BM/TO with cooler, chaff collector and bean mass temp.(Now I find an ideal pot height to be about 4-5 inches)
farmroast attached the following image:

Edited by farmroast on 06/22/2008 1:10 PM
Ed B.
DreamRoast 1kg roaster, Levers, Hand Mills
I regularly roast 1lb. of greens on mine. I do have the oven raised with the popular chaff release modification (metal strip). I get great results...usually get into 2nd crack around 16-17 minutes.
I have roasted in a Stir Crazy Convection Oven rig for years.
Only problem was the shaft did the deep six thing, build a new shaft out of aluminum and stainless steel, filed the other under drawer #13 and never looked back.

So if there's anyone out there thats using the Stir Crazy and needs a shaft that won't melt.

I have done up to 1.5 Lbs in mine only thing modified besides the shaft was I packed the bottom with high temp insulation wire the SC heating element to a toggle switch, throw the plate over the heating element in the Top way works much better to my thinking. split the fan and heater in it so I could control the element with a variac.

one thing for sure, the SC needs a faster motor, I use hand aggitation (pick the thing up and shake it like a dog on a bone) every now and then during th eroast.

I still works and is on top of th efridge, gotta get all the kinks out of the monster I created.

I pour Iron and roast Coffee BeansThumbsUp
If life seems normal your not going fast enough Mario Andrette
I roast close up to 1.5lbs in my ufo to. I modified the stirring rod so that it has two hoops, ie square loops or arches that beans can pass through in the center of each arm.

The aim is to mix and turn the beans thoroughly, not to set the whole mass in circular motion. I also hook the ends so that the outer most beans are swept towards the centre.

Even so, i agree the main thing preventing larger loads is motor strength, Although my mod increases capacity i plan to move to a bread machine motor and maybe a kk style stirrer or design of my own to mix beans.

Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Increasing Batch Capacity Fluidbed Roaster 16 04/18/2020 11:45 AM
I like my popper but need more capacity Fluidbed Roaster 3 10/06/2019 9:28 PM
more Capacity out of SR 500 Fresh Roast 8 and NEW SR 500 6 03/13/2019 3:00 PM
Upgrading to Larger Capacity FB Build Fluidbed Roaster 2 12/30/2018 9:39 PM
5400 Watt Air Roaster capacity? Fluidbed Roaster 12 01/29/2018 3:03 PM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2023 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX
Hosted by skpacman