|Half Gun Drill Jig||Printable Version of the Instructions|
Half Gun Drill Jig directions:
Half Gun Drill Jig.
plans show the location of these parts to some extent, but not definitively
enough for me. So, I cemented two pieces of 5 by 15 MM together, the result being 10 by 15
gave the hull more strength, and me a margin of safety,
in regard to the protrusion of the half guns, that I would have
to control after the planking.
This Jig works in conjunction with the Gun Port Sizing Gauges.
I also had a standard drill bushing that is used in commercial
jigs and fixtures.
We are not talking high production here.
The dimensions are:
piece of Nylon 3/8" thick by 3/4" by 3/4" square.(.750")
must be a press fit. My bushing was #49 (.073") inside diameter, 13/32" (.203" )
assembled Jig is then put into a gunport opening, and the hole drilled,
keeping pressure on the Jig to prevent it from dislodging.
For those who do not have a milling machine,
the Jig can be made from two pieces ,
cut on a saw, and cemented together