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The Country Living Grain Mill 
Motorizing Your Country Living Grain Mill

 
         

For the putterers among us, you can motorize your Country Living Mill in several different ways, some of which are shown below...

Caution: 

Full Liability And Responsibility For Complying To All Federal, State and Local Safety Standards Is Assumed By Any Person Or Persons Who Modify Or Motorize The Country Living Mill In Any Way.

Motorized mills should be operated by adults only. The below schematics are merely suggestions that may help you achieve a lower R.P.M. for cooler grinding if you choose not to grind by hand.

Note: All belts and pulleys not driven by hand should be enclosed.

Motorizing your Country Living Mill invalidates the warranty. However, correctly done, a motorized Country Living Mill should still last for many years under normal use before the bearings or burrs wear out. (And both are replaceable.)

Purchasing a Motorization Kit is the easiest way to motorize your Country Living Mill. It has a gear reduction motor attached to a birch base. It also comes with a safety guard (omitted from photo below for illustration) to hide the pulley wheels and belt. All you have to do is bolt your Country Living Mill to the mount, attach the belt and belt guard and it's ready to go. Just like the Country Living Mill, the motorization kit is built to last for many years. With this kit, your mill turns at about 60 rpm to insure a cool grind for all your flours. 

As long as you have electricity this is a wonderful way to grind your flour.  It's very quiet (you can actually have a conversation standing next to it), and the grind is very cool.  We've had our motorization kit on the Country Living Grain Mill for over four years, and ground flour for friends, neighbors, and a large extended family.  There has been minimal wear on the grinding plates, and the motor has performed flawlessly.  In short, we love it. 



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Below: Schematics for motors which require an intermediate pulley
Vertical Installation

A. Always remove handle when motorizing your mill.
B. Country Living Grain Mill
C. Note: Belts and pulleys should be enclosed for safety reasons.
D. Size A or 4L V-belt 1/2" wide X 5/16" thick.
E. 5/8" keyed shaft.
F. 6" pulley
G. 4 or 5" pulley
H. Pivot
I. 2 ea. 5/8" pillow block bearings
J. 2" pulley
K. Pivot
L. 1750 RPM washer or drier motor
M. Weight of motor will keep belts tight.

Note: All motorized belts and pulleys must be enclosed to prevent serious injury.


Horizontal Installation
A. Country Living Mill
B. 4 or 5" Pulley
C. Size A or 4L V-belt 1/2" wide X 5/16" thick
D. 5/8" pillow block bearings
E. 6" Pulley
F. 5/8" Keyed Shaft
G. 2" Pulley
H. 1750 RPM washer or dryer motor

Note: All motorized belts and pulleys must be enclosed to prevent serious injury.

The following formula will allow you to compute the pulley size needed to achieve a specific RPM: Driven Pulley size X Speed of Driven Pulley Divided by Speed of Driving Pulley = Size of Driving Pulley

120 is the absolute maximum RPM for the Country Living Grain Mill.  Through long experience, we have discovered that our mill performs optimally at revolutions of not more than 60 per minute.

Note: All motorized belts and pulleys must be enclosed to prevent serious injury.



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Schematic For Slow Turning Motor The Easiest Method:
 The 1150 RPM Motor with no intermediate gear reduction.
If you are not mechanically inclined, and want to go a simpler route, some people use the 1150 RPM motor because they are readily available.  We at Country Living feel that this is still too fast because it heats up and creates wear on your plates.  However, many people have done this because it is the simplest and quickest way to motorize your mill.  

We personally recommend that you grind the flour slower and cooler, and have shown you, with the schematics and formula above, how to do this.

Motorizing with a 1150 RPM motor

A. Always remove handle when motorizing your mill.

B. The Country Living Mill

C. Size A or 4L V-belt 1/2" wide X 5/16" thick. Belts and pulleys should be enclosed for safety reasons.

D. The Motor. Must be a 1150 RPM slow turning motor. If you get slots in the motor mounts, this will make it a lot easier to get the correct tension on the belt during installation.

E. Motor Pulley: 1-1/2" diameter.

F. Slidable mounting block for setting the belt tension. You can skip this if you got a motor with slots in the mounts.


Note: All motorized belts and pulleys must be enclosed to prevent serious injury.


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Robert Dee's Mill Motorization GuideLines:

One Country Living Mill owner, Robert Dee, put together a motorized mill and kindly shared his photos and technical specifications with us.

He purchased the motor from a surplus center.  The 2 Horse Power motor was originally used for a tread mill, and has a soft start- which means it takes about five-seconds time for the motor to build up to full speed. 

 

 

 

This motor is rated at 1,800 rpm (Revolutions per Minute), which would turn the Country Living Mill far faster than we recommend- in fact, it just might send your grain mill into orbit.

Robert solved this problem by gearing the speed down with an intermediate 6" pulley linked with a 1 3/4" pulley that ties to the 12" flywheel of the grain mill.

Not satisfied with off the shelf parts, Robert re-machined one pulley he purchased so that it was very concentric, within .002 inches, and then made his own pulleys for the motor and idler shaft! The total drive ratio is about 27-1/2 to 1.

Though the mill has a variable speed adjustment, Robert runs the mill at about 60 rpm, which he feels is the highest speed he can use without overheating the grain.

There's a reason Robert has put together one of the most impressive home-built motorization kits ever -- Robert is no amateur.  For years he has designed  embedded microcontroller circuits and has several medical instrument patents to his name.

Note: All motorized belts and pulleys must be enclosed to prevent serious injury.

 

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