2 and 3,
hardwood being preferable for this purpose. Fig. 2 shows an end
view of the assembled bed, and Fig. 3 shows how the ends are cut
out to receive the side pieces.
The headstock, Fig. 6, is fastened to the bed by means of carriage
bolts, A, which pass through a piece of wood, B, on the under side
of the bed. The shaft is made of 3/4-in. steel tubing about 1/8
in. thick, and runs in babbitt bearings, one of which is shown in
Fig. 5.
To make these bearings, cut a square hole in the wood as shown,
making half of the square in each half of the bearing. Separate
the two halves of the bearing slightly by placing a piece of
cardboard on each side, just touching the shaft. The edges which
touch the shaft should be notched like the teeth of a saw, so as
to allow the babbitt to run into the lower half of the bearing.
The notches for this purpose may be about 1/8 in. pitch and 1/8
in. deep. Place pieces of wood against the ends of the bearing as
shown at A and B, Fig. 4, and drill a hole in the top of the
bearing as shown in Fig. 4.
The bearing is then ready to be poured. Heat the babbitt well, but
not hot enough to burn it, and it is well to have the shaft hot,
too, so that the babbitt will not be chilled when it strikes the
shaft.
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