How to drill A Big Hole
How to enlarge a hole saw or core drill hole
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the may come a time when you cotton all
through a wall or to a piece of material
and they stay in correct size if it's
too big you have to fill the oil in if
the old that you have made is too small
and you need to enlarge it this can be a
problem it's often difficult enlarging
and all that's made by an old sort by a
quadrille but I'm going to show you a
quick way of how to get around it so
demonstrate this technique of cutting
oil to that piece of wood and I've
realized that the oil is too small so I
need to walk with the next size also
obviously you cannot start that in there
because the IVA has nothing to grip so
it's impossible to start that drill on
there it'll just skid it all over the
place if therefore I've cut a piece out
using a piece of scrap material that
will fit in there and I've done that
using the same old saw that I use to
actually make this all and now we're
going to form that in there using a form
gun once it's got off we can then use
the center of that to get our also
started again so I'm not going to push
that into position and then I'm going to
old it in position using some expanding
foam
we're now just going to leave that to QE
for ten or fifteen minutes and then
we'll go through there with the larger
also the form is now cured so it can
just remove that piece on the end there
you can see there was no about a piece
of wood that's firmly fixed in there
that will enable us to get the old soil
started so I can now put that in there
and go through with the larger sized
also
so it's always useful to know how to do
that just in case you ever do make and
all that is slightly too small you can
always enlarge it that way this
technique also works with quadrilles so
what you can do is you can call to the
piece from a sacrificial block and you
can form that in position and that will
enable you to get you all started and
you can then cut out the larger core
drill all using the larger bit
