I need to widen a hole I made through 3 2x4's with 2 spade bits. I made a hole with a 1" bit, then used a 3/4" bit next to it, so that it overlapped just a bit. Unfortunately I started the second hole at an angle, and by the time I got down into the last 2x4 the center was almost into the original 1" hole, and the bit slipped over and through. Now I have a V shaped hole that tapers too much to be of use, and I don't know how to widen the hole so that the sides are parallel.
It's to run a DVI cable through the wall (wide and skinny). I switched from the 1" because it was larger than I needed, and more importantly, it was incredibly dull. Took about 3 minutes to make the hole with the 1", 20 seconds w/ the 3/4". I'm not sure how a hole saw would help, unless I just made a huge hole around the two smaller holes. I'll look into a forstner bit i spose.
I don't have a sawzall, and as much as I love reasons to get new tools, I don't think I can justify it for a couple inches of wood. My jigsaw just is too bulky to fit down in this space and the blade isn't long enough to cover the 4.5".
I guess I was hoping for some sort of electric file or something.
It's to run a DVI cable through the wall (wide and skinny). I switched from the 1" because it was larger than I needed, and more importantly, it was incredibly dull. Took about 3 minutes to make the hole with the 1", 20 seconds w/ the 3/4". I'm not sure how a hole saw would help, unless I just made a huge hole around the two smaller holes. I'll look into a forstner bit i spose.
I don't have a sawzall, and as much as I love reasons to get new tools, I don't think I can justify it for a couple inches of wood. My jigsaw just is too bulky to fit down in this space and the blade isn't long enough to cover the 4.5".
I guess I was hoping for some sort of electric file or something.
Look at wood rasps in your local hardware. See which one fits in your space. There are attachments for your drill that will work- but a good rasp will take off a lot of wood in short order.
Everyone has advice. ;) A hole saw drilling through a tacked on piece of plywood (acts as a guide to get the hole saw started in the right place) would do the trick nicely. Reposition and reuse the plywood guide if you need two holes side by side.
The hole saw will work...either with Rico's more elegant solution (the drill guide} or mine ...which is to use a decent drill motor (Milwaukee right angle or Hole Hawg or equals).
Use a 1" hole saw to dig into the failed 3/4" hole. The key is (was) to cut overlapping holes......partial holes, don't drill through any of them until they;re all close to done)
With a decent drill motor & some muscle you can get hole saw cuts to overlap ......you need to leave meat for the pilot drill to engage at first but once the hole saw is cutting it becomes self guiding. Now that you have no "hole center wood" you might need the plywood guide.
I'd use 1" MDF (if you've got some) & drill the over lapping holes you want to wind up with...screw that guide in place & go for it.
If you don't want to use the guide just use the 1" hole saw as an end cutting milling cutter & chew out the hole.
BTW it is very difficlt (close to impossible) to get spade bits to cut over lapping holes. Aletnativley (too late now, but next time) cut two non-overlapping holes witht the paddle bits about 1/2" apart & cut between the holes with any hand saw blade that will fit.
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