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Old 11-27-2012, 07:13 PM   #1
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Default Technique for sofit/mast holes

Whats some of you all's technigues for lining up and drilling nice clean, straight riser holes through soffits ?? Laser beam, level, straight up, straght down, one movement, etc
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Old 11-27-2012, 07:15 PM   #2
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Whats some of you all's technigues for lining up and drilling nice clean, straight riser holes through soffits ?? Laser beam, level, straight up, straght down, one movement, etc



Cue 480's tool. Be warned, it's patented.
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Old 11-27-2012, 07:17 PM   #3
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I usually drill up with a long 1/4" bellhanger bit after putting a level on it.
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Old 11-27-2012, 07:22 PM   #4
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My trick has always been to have someone else do it.
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Old 11-27-2012, 07:29 PM   #5
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Cue 480's tool. Be warned, it's patented.

The Binford 6300 Mast Hole Saw.





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Old 11-27-2012, 07:32 PM   #6
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I haven't heard the brand Binford in a while.
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Old 11-27-2012, 07:42 PM   #7
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The Binford 6300 Mast Hole Saw.





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Old 11-27-2012, 07:52 PM   #8
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A 30-06 makes a nice pilot hole through both sides.
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Old 11-27-2012, 08:00 PM   #9
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A 30-06 makes a nice pilot hole through both sides.
I've never tried that but years ago I watched an electrician do that with a .22! Can't imagine a HO being impressed with that!!
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Old 11-27-2012, 08:05 PM   #10
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I use a lazer level to project the center point up to the soffit and then run a pilot through with my 1/4" bell hanger bit then use the hole saw on each side. Works well for me.
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Old 11-27-2012, 08:11 PM   #11
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Technique for soft mass holes


methinks it's time to fnd my spectacles for this ......~CS~
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Old 11-28-2012, 09:30 AM   #12
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All you youngsters with your whiz-bang fancy ways! Here's how I do it:

I first figure out exactly where the hub on the panel will sit. That might mean mounting the panel, marking the location, and removing the panel. You need the panel off the wall to continue.

I next mount a full stick of mast to the wall. It's mounted on center with the hub opening I marked, and I use a level to make sure it's plumb. I raise the pipe until it contacts the soffit. Now I mark the soffit, and remove the pipe.

Since I now know where my hole must be, I set my hole saw, backwards and without arbor, within the circle I drew around the pipe. This lets me mark where the pilot drill will go.

Use your hole saw to just make a score in the soffit, to just start to cut. Do not make the big hole yet.

Instead, use the little pilot hole to place a long 3/8" drill. I use a 3/8, because I find 1/4" drills bend too easily when they meet the sloped roof. Making sure I'm plumb, I drill a 3/8" hole through the roof. Now it's time to go topside.

Asphalt shingles are instant death to hole saws. So, I use a knife to cut away the shingles around the 3/8 hole I drilled. Make the cuts simple and well clear of the mast; your 'roof jack' will cover this area.

Holding my hole saw plumb, I use my Sharpie to mark the oval hole. Since I have the Sharpie flat against the saw, the marked area is about 1/4" larger all around than the 'perfect' hole. No matter, you don't need - or even want- a tight fit.

You've got a pilot hole; now cut the roof deck with a Sawsall or saber saw. You're done cutting 'on top.'

Now return to the soffit and finish the hole you started. You won't need the pilot drill to guide you, since the saw kerf you cut before will guide the hole saw.

Push the mast through, and anchor it a bit high. Hang the panel, and drop the mast into the hub. Better yet, have the hub ON the mast, and now boltthe hub to the panel. Finish tightening all your anchors.
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Old 11-28-2012, 01:59 PM   #13
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I've never tried that but years ago I watched an electrician do that with a .22! Can't imagine a HO being impressed with that!!

Remember the redneck idiot who accidentally shot/killed his wife while installing cable TV using this method? It was a great story from a couple years ago.


I only occasionally run into eave soffits out here. When I do, I just drill the soffit hole then eyeball a pilot hole thru the roof.

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Old 11-28-2012, 07:45 PM   #14
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I usually drill up with a long 1/4" bellhanger bit after putting a level on it.
ditto...........or just use a 6 inch hole saw....that way you have some play if miss by a few inches or so, and you are good!
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Old 11-28-2012, 08:26 PM   #15
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bell hanger bit and a good and a junk 2 1/2" hole saw. The junk one i ram through the shingles, and use the good one for the soffit and the wood left up top. For roof too steep for the bell hanger bit, I have a peice of RMC bent into a u, 3' in each direction, with 2 level jb welded to it. Set this contraption around the soffit, line up the bottom centered both ways where the mast will be, then plumb it up. Where the top of the u tool lands on the roof is where you need to drill. I have only had to do this twice. I think each house had a steep pitch and a deep soffit.
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Old 11-28-2012, 09:18 PM   #16
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Around here, people pay us to remove their overhead and install underground. New installations are always underground.
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Old 01-19-2015, 09:31 AM   #17
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Here's the one we used to use. Boy does that bring back memories. We always used a longer pilot bit than shown in the picture.
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Old 01-19-2015, 10:56 AM   #18
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Here's the one we used to use. Boy does that bring back memories. We always used a longer pilot bit than shown in the picture.
The guy I used to work for had something similar to that but it only drilled the pilot hole. It was just a piece of 2 inch rigid with a piece welded in each end to center the bit. The bit slid up and down a long ways. You drilled the bottom hole the stuck this up in it leveled it then drilled the pilot hole in the roof. Then you drilled out the hole up above. Worked great.

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Old 01-19-2015, 04:47 PM   #19
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Dammit.


I hoped that Cletis was back.
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Old 01-19-2015, 05:17 PM   #20
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