My Stainless Steel Bonsai sieve arrived from ebay, and gosh, it looks
Well, it's a place to start :)
The measurements are what were claimed on ebay, it is just that the
screen is not mounted on the bottom. It is about 3/4 inch up, and the
larger screen is mounted permanently.
I chose to also use the medium screen.
The fan I used came out of an air purifier. The air purifier was about
the size of a hassock, a floor model. The fan is about 13 inches in
diameter, and it is a two speed :)
It blows so much air that I decided to have the air draw down through
Because I have a garage full of stuff for coffee roaster design etc, I
had some galvanized flashing two feet wide.
I cut a piece of this long enough to wrap the fan, tightened it to the
shroud with a screw clamp, and then did the same on the 'top' part with
The result is sort of a truncated cone with the fan on the bottom and
the sieve sitting in the top.
I Covered the top edge with duct tape to help guard against scratches
and to seal it a bit better.
The fan is on the bottom, so it would sit on the ground except that it
is large enough to sit on top of a plastic milk crate :)
The crate sits on some scraps of 2x4 to hold it off the ground.
Nice holey stand to let chaff escape.
All in all about a half hour work.
You all know that part of my coffee roasting criteria is that I must not
have to wear gloves.
So I had been using a hair drier to cool the batch and that worked
pretty good; that also removed all the chaff.
To get the beans in my cooling tower I thought I would do it in two
stages.. dump them into a SS bowl as if they were cool (the outside of
the PGR stays cool!),
put that in the sieve, and go back for the rest.
Scooping the rest out with a wooden spoon into the bowl.
By the time I got the second part of the batch into the sieve, the first
part was cool!!!
This thing WORKS WELL!
Maybe the fact that the temp outside is only 65F helps too ;)
Next batch I just tipped my PGR into the sieve and all the beans went in.
When I put the roaster back down on the table, turned things off etc.
and went back to the sieve, that pound of beans was cool to the touch
This is probably not as good a set up as Ray's blower, but it is much
faster than a hair drier ever was.
Not only that I can just dump the beans and start another batch right away.
No more waiting for them to cool before I can dump them.
The only thing is that a pound and a half of beans fills it more than
half full, so you have to be careful stirring lest they run up over the
I usually roast 700 Gr for our weekly consumption.
I will work with this setup for a while, and may cut the bottom out of a
SS Wok to nest the sieve in, to allow more beans to be stirred, or just
go for a larger sieve.
Right now I am very impressed with how well it cools and how quickly.
Stirring the beans removes ALL the chaff, as good as a hair drier did :)
Now I have to let the Green Stripe rest to see if I can taste any Blueberry.
Cooling thoroughly and quickly may help.