I'm making a cutting and assembly bench, using a solid core door with
a sheet of 3/4" MDF as disposable surface. Any suggestions on how to
drill dog holes? The holes will have to be about 2-1/2" (1-3/4" door
+ 3/4" MDF)
The drill press isn't going to work (the door weighs about 80#,
alone). I thought about a forstner bit but perpendicular is a
problem. I also thought about a router and template but it sounds
like a lot of work.
But dad wouldn't have had to moose it onto the Bridgeports. The
machinists would have cut the holes for him. ;-) I don't think he
was technically their boss but he looked out for them (he was a prof
at the university).
On Sunday, August 16, 2015 at 1:07:27 PM UTC-7, krw wrote:
I'd start the process with a plunge router and a jig (carefully space pilot holes).
Then, proceed with a (Portalign or similar) drill guide, and
do step-and-repeat enlarging of the holes. Use a hole saw, with
a pilot pin instead of the usual pilot drill. You'll have to work
at clearing the sawdust, of course, and the little donuts
of wood will take a while to work out of the saw. That's
why the drill won't overheat. :-)
The step and repeat process sounds like it'll be difficult to get
aligned properly. I looked at a drill guide quite similar to that at
Woodcraft on Saturday. It looked too fragile, though I was thinking
about a single pass with a 3/4" Forstner at the time.
I used a plunge router.
you just mount a piece of hardboard to it, put a fence on it.
Drill a hole however far you want the spacing.
Then drill them with the router.
Got an Onsrud HS 3/4 upcut bit.
As far as solid core door and mdf, they are not very good for dog holes.
But you'll find out. Solid core means particle board usually.
I just drilled dog holes using an up spiral plunge router bit
I cut 2 holes in a template the size of the router base as a guide. Clamped the guide squarely to the edge off the bench.
A center line of the guide was lined up with a line on the table.
Also, I got the bit from MLCS.
Good luck, Kirk
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