Inboard Hardware: Making the Shaft Hole
Page 4...
In use, the strut is located first and bolted in
position. The boring bar, which is the same diameter as the shaft to be used,
is inserted in the strut bearing to serve as a guide in drilling the hole.
Usually, in starting the hole in the bottom of the boat, the hole saw will tend
to creep forward. Holding a block with downward pressure on the hole saw will
tend to cut a cleft similar to that shown in Fig. 12-1 in order to give the
drill a chance to start to bite. The boring bar is powered by an electric drill
and will do a quick job (see Figs. 12-6 thru 12-9).
FIG. 12-6: The strut is bolted into position in the
manner described in Chapter 8. The shaft of the boring tool is then slipped
through the strut.
FIG. 12-7: The boring bit is threaded to the shaft. Note
that this shaft is the same size as the propeller shaft in order to fit firmly
into the strut.
FIG. 12-8: An electric drill is used to drive the boring
tool. When starting to drill, a helper should apply downward pressure with a
block of wood to prevent the drill from creeping out of position. Alternately,
a block of wood, pre-drilled at the required angle, as shown in PLATE 39, could
be used.
FIG. 12-9: The shaft hole can be drilled in a matter of
minutes using this tool.
Return
|