Our last post told about our
wonderful oat roller. As that purchase worked out so well, the next experiment
on our grain processing journey was to purchase a wheat grinder. Once again we
did some research, but our purchase this time was not as smooth running.
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Retsel Hand Powered Wheat Mill |
We wanted to keep things as simple as
possible and decided on a hand cranked wheat grinder called Little Ark,
purchased from Retsel in Dandenong, as a 60th birthday present for
Heather. One reason we chose this model
was because we were told it could be attached to an electric motor if we wanted
to go down that path in the future. The package, which included the handmill, steel
grinders, stone grinders, 2 pulleys and a v-belt was fairly pricey, but the
machine was a simple well-engineered design.
When we got home we eagerly unpacked
the unit and put it together. In our minds we could already smell the beautiful
aroma of bread baked from our very own freshly milled grain. We soon found out
that it took far too long to mill enough flour for a cake by hand (and was very
tiring as well).
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The motorisation kit |
So we set about converting the Little Ark to a motorised unit.
We had all the gear necessary except for the motor (A very important
component). We had been told that the cheapest source of a motor was to extract
one from an old washing machine. Often people throw out machines with good motors
when they start leaking, when the electronics that control the washing cycles
fail or perhaps the gears seize up. I confidently told Heather that we would
pick one up from the side of the road within the next few weeks.
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Our second hand washing machine motor |
In Victoria, we have a wonderful
system of recycling called roadside collections. Each Shire has their own
system, but generally it involves residents putting unwanted household goods on
the roadside for collection by contractors (who hopefully recycle them).
Although it is frowned upon by some, these collections are a goldmine for
people like us, who have an obsession for re-using things. We spent the next
month scouring roadsides on every trip we made. We came across every
conceivable type of household product but no washing machines. Suddenly old
machines were as rare as hen’s teeth!
We kept looking over the next few
months and eventually came across one. We took it apart, attached the motor and
turned on the power. To our relief the motor happily turned the grinder.
However when we placed grains into the hopper, the motor didn’t have enough
torque to turn the stones that ground the wheat. It just stopped. It was
time to begin our search again, but this time for a stronger motor.
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Our grain processing bench with storage shelves |
Over the next twelve months we came
across several more machines. In each case we ran into problems. Usually it
took around half an hour to get the motor out before we found out what the
problem was. Some didn’t work, others were not strong enough, whilst others had
shafts that were too big for our pulley wheel. It was important for the motor to
have a small pulley on it which then drives a larger one on the grinder to gear
the process down so that grinding stones are not turning too fast. If the
grinding surfaces turn too fast, the stones and the wheat become too hot and the
flour quality is severely reduced.
In an act of desperation we called
into a shop that sold second-hand washing machines, thinking they might be able
to help us source the perfect motor for our job. This idea came to an abrupt
halt when they told us that for many years washing machine technology has advanced
beyond the sort of motors we were looking at. Our only hope was to pick up an
old machine with a suitable motor.
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The grain mill in action -how easy is that! |
By now we had almost given up on the
project and the grinder was packed away. However, by chance we mentioned our
dilemma to Heather’s brother Graham and he said he might be able to help. He
took us down to his shed and pointed out a shelf at the back. There, underneath
a few other things were two electric motors. Suddenly our grain grinder dreams
were reawakened.
These motors were larger than the
ones we had tried before so everything looked promising. We found some brackets
to hold the motor in place, and rigged them up so we could slide the motor
along to tension the drive belt. We flicked the switch and tipped
some grain into the hopper. It worked well at first- a bit too well. The stones
were turning too fast, and then they stopped. The big pulley on the grinder was
slipping on its axle.
This was a whole new problem. To solve it we had to get the pulley off the drive shaft. No matter how hard we banged it, it wouldn’t budge. So once again we lost our enthusiasm.
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Freshly milled flour |
By now Heather’s 61st birthday had passed but she still
dreamed of a day when we would be grinding our own flour. Then one wet day when
we didn’t have anything else to do, she suggested we have another go at getting
it working. This time after a few well placed whacks the pulley came off. The
slipping problem was a result of the small worm screw in the hub of the pulley
not aligning with the flat spot on the shaft. Out came a file and a new flat
spot was created and the whole lot put together. We added an old light switch
to the circuitry to allow us to turn it on safely and away it went. To slow it
down we placed an intermediary pulley in between the other two. This brought
the rate down to about 100 turns per minute which is just right.
For a very professional finish, all the gear was mounted onto a solid bench (discarded by a member of the family) that also holds our oat roller. We turned the drawer space underneath into a convenient storage area for grains and equipment. The final modification needed was a cover to fit over the grinding stones to direct the falling flour downwards (instead of flying sideways). Heather made one out of an old ice cream contatiner and it works a treat.
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Time for coffee and cake (made out of fresh flour of course) |
Wonder of wonders now a cup of flour
takes only a couple of minutes to grind and this is far less tiring than doing
it by hand. It is all 18 months late, but at last Heather has got her birthday
present. Perhaps we should start working on her 62nd birthday
present now- she might just get it by the time her birthday, comes around in 2
months time!
PS. We purchased our Survival Ark Mill from Retsel in Dandenong. Their web address is www.retsel.com.au