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Flip the middle disc over on the ground. Place the two remaining half-drums in position along
the diameter line. (They will be at right angles to the alignment on the other side of the disc.)
Drill holes through the drilled drum brackets in the half-drum edges into the disc, bolting through
some of the holes as you go.
<FIGURE 12>
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Place the top disc flat on the ground with the support bracket facing up (that is, the bottom of the
disc facing up).
Invert the middle disc with the two attached half-drums onto it, so that the free ends of the half-
drums line up along the marked diameter line.
Drill holes through the drilled drum brackets in the half-drum edges into the top disc.
Take apart any discs and half-drums that remain together and set aside for final assembly later.
While handling the half-drums they may change shape slightly, causing bolt holes to move out of
alignment with holes drilled in the discs.
They may be brought into exact Shape when bolting up by exerting hand pressure.
BEARINGS
End pieces of the top and bottom of the rotor shaft each rest in a roller or ball bearing attached to
a horizontal support beam.
This insures smooth and efficient rotation. It is important to select good bearings and install them
properly.
The author recommends using bearings with a minimum inside or shaft diameter of 1". The
bottom bearing must be self-aligning in all directions, and must be capable of taking the dead
weight of the rotor, which depending on its construction should not exceed 200 lb.; that is,
the bottom bearing must withstand both an axial thrust and side loads of 200 lb.