Motorization of a Glatt Mill

I motorized my Glatt Mill with a 1/12 hp 1750 RPM motor.  At the
suggestion of Greg Glatt, I strove for an RPM of around 300.  The mill
has a pulley of 8" and the motor a 1.5", so that is a reduction factor
of .1875 giving 323 RPM.  The shaft of the mill is 3/8" and the pulley
was 1/2" so I got a bronze 3/8x1/2 bearing and drilled a hole through
it for the set screw and used it as a bushing.  Be careful, bronze
bearings may shatter when drilled as they are quite brittle.  You
could use a steel bushing if you can find one.  A simple V belt
connectes the two pulleys

The stand is a simple box made of 1/2" plywood, glued and screwed
together.  The top and base are 8" square and the height on mine is
12", you may want to vary the height due to your catch receptacle's
height.  The height must be tall enough to put the output shoot above
the catch receptacle, and the internal size of the box must be big
enough for the motor.  The box is open completely on one side (the
side for the pulley, and the opposite side is open 1/3 at the bottom.
That partial side is mainly used as a stiffener and a place to put the
power switch.

The motor must be connected to the mill by means of some sort of
clutch since the possibility of getting a stone stuck in the rollers
and jamming the mill is real.  If it should stick, the clutch should
disengage immediately to prevent damage to the mill's gears.  The
simplest way to do this is to use the weight of motor to put friction
on the belt.  Putting extra load on the mill will cause the pulley on
the motor to slip on the V belt.  Simplest, cheapest clutch money can
buy.

Mount the motor in this fashion.  Orient the box with the wholly open
side facing you.  Cut a 6" x 6" piece of plywood and attach a piano
hinge to one side.  Hold this piece with the hinge on your right, then
screw the other side of the hinge to the right vertical panel on the
inside of the box.  It should be positioned so that motor, when
mounted on the hinged platform is about 2" from the top of the box.
The hinged platform should be free to swing up and down at least a
couple of inches and you may need to file off the edge of the plywood
shelf until you have this travel.

Without changing the orientation of the box, mount the mill on top of
the box with the outflow chute to your left, and the pulley towards
you, the pulley extending over the side of the box so that the V belt
will clear the box by at least 1/2".  Mount the motor on the hinged
shelf so that it's pulley lines up with the motor pulley.  Obtain a V
belt with a length that allows the motor to be in a "neutral" position
when all of its weight is on the belt (i.e. the shelf is close to
horizontal).  If the shelf angles up or down too much, this is not
good.  Slightly below horizontal is OK, but if you go much above
vertical, you will not be able to raise the motor enough to get the V
belt on (i.e. the belt is too short).

Intall a 110V switch on the 2/3 panel and wire it up.  You are all set
to go.