pinblock drillpress

[Mark Dierauf]

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Eliot & Rob -

  I use a 36" solid core door for the "deck plank" and find that it =
doesn't seem to bow at all. For the press, I bought an old Rockwell =
floor unit (heavy), removed the base and replaced the column with a =
shorter one of the same diameter that I bought at a local scrap metal =
dealer. I made a 3/4" plywood base somewhat bigger than the drill-press =
table, with a 3/4"x3" hardwood frame glued to one side. It's this frame =
that actually rides on top of the solid-core door, and with both the =
frame and door liberally coated with teflon, there's less friction than =
there would be had I used he plywood base alone. I then mounted the =
drill-press table upside-down on my frame, using 4 suitably sized =
carriage bolts that come up through the bottom of the plywood and =
through the existing holes in the press table. The table actually rests =
on nuts (with washers) on these bolts, with another nut and washer on =
each to lock it in place. Because I can alter the height of the nuts, =
the table is adjustable to whatever angle I want. Then I installed the =
short column, and slid the drill head all the way down until it sits on =
the underside of the table. I have to use the slightly longer drill bits =
from Pianotek, or the throw wouldn't quite allow the bit to break =
through the bottom of the new pinblock. To keep the bit cool, I =
constrict the flow of my shop-vac by covering most of the hose-end with =
duct tape. This pulls a fast stream of air past the bit, instead of =
pushing air past like a compressor would, and has the added advantage =
that is sucks up the wood chips at the same time.

Mark=20

Rob Goodale wrote:

>Eliot,
>I recommend a radial drill press made by Delta.  I'm not certain of the =
exact
>model number but it is specialized enough that I doubt that there are =
more than
>a couple models at most, (I'll see if I can get the number).  I just =
purchased
>a new one for the university.  I used the exact same machine when I ran =
the
>rebuilding shop for a dealer.  The advantage is an extra long throat =
which will
>extend out over the block without upsetting the balance of the machine. =
 It
>also give you plenty of room to work.  It must be modified via =
shortening the
>main pillar to the very bottom but this is not a big deal.  You will =
then need
>to set the 7 degree angle.  To do this simply mount the machine on a =
piece of
>3/4" plywood and install wedges under the back end.  You will need to =
construct
>a deck plank, (for lack of a better name), which lays across the piano =
as a
>table for the machine.  Make absolutely certain you reinforce this =
structure
>from below, (angle iron or similar arrangement), so that it does not =
bow under
>the weight of the machine.  You can sand it smooth and wax the surface =
so that
>the machine is easy to slide along as you work.  Do it up pretty and it =
will
>all work fantastic.  Unfortunately this type of drill press is VERY =
expensive,
>(I think the one I just bought was around $300.00), but it is a one =
time
>purchase.  It will easily outlast your career.

>Happy block boring!

>Rob Goodale, RPT
>Las Vegas, NV



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