I bought the kids the cheap cast iron grinders, for emergency use, my one DD uses it all the time, for there grain grinding, I borrowed the other back from my other DD, and used it to test grind some things before building a farm sized burr mill for grinding grain for my goats and chickens, it was a 500 model I see them on Ebay at times for about $30 to $40,
http://cgi.ebay.com/Cast-Iron-Corn-G...item563f9ec64e
first it will give you a work out, but I was playing with wheat the other day since I was planting wheat and it was easy to get to, (wife has an electric grinder we bought 25 years ago that make very fine flour,
NOTE: I am not recommending this unit or endorsing it, but give my experiences with it,
first I would run a few cups through the grinder just cracking the wheat, and then would re grind it and after about 5 times, of closing the unit up I had some fairly fine flour, and a sifting would have taken out any thing heaver,
no I would not want to grind flour to bake for a family of 6, with it, but it will work but will take some time if one wants to close it down tight and really crank it one can do it with fewer passes, but i had it set on the 4 or 5 passes so my grand son of 6 could turn it with effort,
I was considering get a few and put them in the drum of wheat, (30 gallon steel trash can) just so if an emergency would occurs one would have a tool to grind it with,
I bought a used grinder off of Ebay that was US made (looked similar) but the burs were cut instead of cast, and gave it to my DD for trade, it grinds with a lot less effort, and the auger is different and I do not think it pushes as much grain in to the burrs so there is not as much load on the handle to grind with,
the cheap units will work but there crude and cheap, ( had to rework s few of the pieces to get the burs to run with out wobbling and making them run true, but they will grind what in to flour if there trued up and can run multiplet passes,
my other DD grinds the first pass, and then sifts out the large and then regrinds, (i have never worked on hers, we just sent it to her),
Note: I bought the grinders from a place Pre Ebay, a good number of years ago,
I personaly would want some thing better if I could afford it, but it will work and will grind usablely fine (IMO), and it is low cost.
EDIT: I agree with the above poster, "If we got one, it would either be a Diamant or a Grainmaker". I really like the look of the grain maker my self, nearly ordered one instead of building my own for the goats and chickens, (note: the one I built will not grind flour, but cracks grain very nice for the animals).