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Topic:
Hole saw that uses a hole saw for a pilot
This thread has 18 replies. Displaying posts 1 through 15.
Post 1 made on Wednesday October 11, 2017 at 09:28
Fins
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One time, long ago, someone posted a link to a hole saw bit that was for making a hole bigger. Instead of using a drill bit for the pilot, it used the original sized hole saw for the pilot. So it was a hole saw inside a hole saw.

Anyone know where to find one of these?
Civil War reenactment is LARPing for people with no imagination.

Post 2 made on Wednesday October 11, 2017 at 09:34
77W
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[Link: amazon.com]
Post 3 made on Wednesday October 11, 2017 at 10:10
SB Smarthomes
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If your just drilling through framing (not finish work), you can drill the larger size hole through a scrap piece of lumber and then screw or clamp this piece over your existing hole to use as a guide.

1/2" or 5/8" plywood is ideal because you can easily screw through it to secure to  the lumber that has the hole that needs to be enlarged.
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Santa Barbara Smarthomes
Post 4 made on Wednesday October 11, 2017 at 11:20
edizzle
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On October 11, 2017 at 10:10, SB Smarthomes said...
If your just drilling through framing (not finish work), you can drill the larger size hole through a scrap piece of lumber and then screw or clamp this piece over your existing hole to use as a guide.

1/2" or 5/8" plywood is ideal because you can easily screw through it to secure to  the lumber that has the hole that needs to be enlarged.

This^
I love supporting product that supports me!
Post 5 made on Wednesday October 11, 2017 at 11:33
fcwilt
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Hi,

My DeWalt and Lennox hole saw sets allow nesting a smaller cutter inside a larger one on the same arbor.

Frederick
Regards, Frederick C. Wilt
Post 6 made on Wednesday October 11, 2017 at 11:45
thecapnredfish
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Fcwilt. Sounds like something great for making onion rings. Smartphones method is the one I use.
Post 7 made on Wednesday October 11, 2017 at 12:12
3PedalMINI
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On October 11, 2017 at 10:10, SB Smarthomes said...
If your just drilling through framing (not finish work), you can drill the larger size hole through a scrap piece of lumber and then screw or clamp this piece over your existing hole to use as a guide.

1/2" or 5/8" plywood is ideal because you can easily screw through it to secure to  the lumber that has the hole that needs to be enlarged.

+1

Less of a chance of ripping your arm off too
The Bitterness of Poor Quality is Remembered Long after the Sweetness of Price is Forgotten! - Benjamin Franklin
Post 8 made on Wednesday October 11, 2017 at 12:25
fcwilt
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On October 11, 2017 at 11:45, thecapnredfish said...
Fcwilt. Sounds like something great for making onion rings. Smartphones method is the one I use.

The larger cutter goes on first, then the smaller one.

As a result the smaller one sticks out a bit from the larger one and allows using that bit to engage the existing hole.

It works fine.

Frederick
Regards, Frederick C. Wilt
OP | Post 9 made on Wednesday October 11, 2017 at 12:58
Fins
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Except y’all missed SB’s own part about finish work. The reason this came up this morning is because of a new customs cabinet. And I don’t see why the size of the pilot would make the holesaw any worse grab.
Civil War reenactment is LARPing for people with no imagination.

Post 10 made on Wednesday October 11, 2017 at 15:12
Ernie Gilman
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The size of the "pilot" would matter because the person wielding the drill might not have the skill to drive the smaller hole saw in without binding.

On October 11, 2017 at 12:12, 3PedalMINI said...
+1

Less of a chance of ripping your arm off too

Well, this has its advantages!
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 11 made on Wednesday October 11, 2017 at 18:21
3PedalMINI
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On October 11, 2017 at 15:12, Ernie Gilman said...
The size of the "pilot" would matter because the person wielding the drill might not have the skill to drive the smaller hole saw in without binding.

Well, this has its advantages!

that made me chuckle lol
The Bitterness of Poor Quality is Remembered Long after the Sweetness of Price is Forgotten! - Benjamin Franklin
Post 12 made on Wednesday October 11, 2017 at 20:25
Ranger Home
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Im not understsanding this thread.
Post 13 made on Wednesday October 11, 2017 at 20:39
tweeterguy
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My take: he has a cabinet with a wire pass through hole from the factory or previous installer; it’s too small of a hole, he wants it bigger to get more cables through.

My idea: have some monkey hold a board on the opposite side than you are drilling. This will give your pilot drill bit something to bite into while the hole saw starts to do its thing.
Post 14 made on Wednesday October 11, 2017 at 21:32
Ernie Gilman
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On October 11, 2017 at 20:39, tweeterguy said...
My take: he has a cabinet with a wire pass through hole from the factory or previous installer; it’s too small of a hole, he wants it bigger to get more cables through.

Always cut 2" holes for wires. Straight three-prong plugs require a 1 1/8" hole (IIRC), but if you cut a 1 1/8" hole and then someone runs a couple of cables through the hole, you'll have to unwire the entire system to remove that power cord. So cut 2" holes.

Then if those holes need to be enlarged, I push the pilot bit against the side of the hole and take a bit more wood out of one side of the hole.
My idea: have some monkey hold a board on the opposite side than you are drilling. This will give your pilot drill bit something to bite into while the hole saw starts to do its thing.

You'll need an especially long pilot bit for that, but sure. The other approaches don't require anything special.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 15 made on Wednesday October 11, 2017 at 22:16
rguy1
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77W!!! Thank you!!! I am buying one of those Bosch units now just so next time this comes up I am prepared!!!
I learned how to use bimetal hole saws back in '82 cutting 5" holes in late 70's Camaros/Firebirds doors through triple steel, spot welds and all! Using a Black and Decker 1/2 hp drill with a big T handle at 700 rpms!  I was taught to lock in using your legs and dont f'n let go.  Dont force it, just let the saw cut as you ease it through...  Slow and steady!!!
I actually snapped off the threaded end of the chuck in the armature shaft after years of use.
You either got hurt or learned real fast how to use hole saws.
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