Enlarging existing through hull holes

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03-22-2008, 07:39 PM

#11

Audiofn

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Quote:

Originally Posted by insptech

The deep one slides right in way before the outside one touches, centers up perfectly.

Youi dirty old man!!!

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03-22-2008, 07:49 PM

#12

Westcoast

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Quote:

Originally Posted by Audiofn

You can stack hole saws on one bit if you have the good ones. Use the one for the size that you need and put that on first. Then put the smaller one on the inside of that one.

Jon

That is the methed I used to enlarge my exhaust holes from 3" to 4"

03-23-2008, 08:58 AM

#13

bouyhunter

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Quote:

Originally Posted by Audiofn

You can stack hole saws on one bit if you have the good ones. Use the one for the size that you need and put that on first. Then put the smaller one on the inside of that one.

Jon

Used to use this trick all the time - works very slick!

03-23-2008, 09:00 PM

#14

stageharbor

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I have an arbor made specifically for this purpose of using a hole saw as a pilot bit. I think it is made by lennox. not sure where i got it but is definatly a great tool.