how do i cut sonotube and keep the cut straight ? - diyAudio
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Old 8th July 2006, 07:20 PM   #1
zuki is offline zuki  United States
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Default how do i cut sonotube and keep the cut straight ?

what is the secret magic trick to this ?

thank you
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Old 8th July 2006, 07:33 PM   #2
poobah is offline poobah  United States
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Get a long piece of paper at least 1 foot wide. Wrap this around the sonotube until the edges are aligned exactly and ther are no wrinkles. Take a pencil and scribe along the paper. Cut by wahtever means and follow the line.

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Old 8th July 2006, 07:43 PM   #3
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just send it here - i'll cut anything up to 6" with my chop saw...
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Old 8th July 2006, 07:47 PM   #4
zuki is offline zuki  United States
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the tube is 12" dia
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Old 8th July 2006, 07:49 PM   #5
poobah is offline poobah  United States
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Your paper should be about 4 - 5 feet long then. What tool are using to cut with?

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Old 8th July 2006, 07:55 PM   #6
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A piece of masking tape works wonders as a guide. A steady hand and a box cutter should do the trick. You could always cut it a little long and file or even sand it down, too. I just got a dremel I'm going to try next but again, steady hand. Also, a few of my saws come with edge guides one could place on the other side.
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Old 8th July 2006, 07:58 PM   #7
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go with poobahs advice - masking tape is not easy for a nice straight egde.
I would cut using a fairly fine tooth sandvik saw, about 16" minimum.
Boxcutters on sonotube...naahhh, broken blades, cut fingers come to mind.

Also - I cut a lot of ABS by hand - cut to below the thickness of the material, then turn the tube, and cut following the previous cut channel and the pencil mark, continue that way. It is easier to follw the line thean trying to cut through the whole tube from the start position.
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Old 8th July 2006, 07:59 PM   #8
zuki is offline zuki  United States
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it needs to be cut down from 12' to 36"

i have plenty of saws. just want to know how to do it.

thank you
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Old 8th July 2006, 08:03 PM   #9
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Quote:
Originally posted by audio-kraut
Boxcutters on sonotube...naahhh, brolen blades, cut fingers come to mind.

They don't call me Ghetto for nuthin'!

seriously, I actually used duct tape but it can pull off the outer layer upon removal. it seemed like the box cutter really "used" the guide if I went slow. Definitely ate the blade though.
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Old 8th July 2006, 08:09 PM   #10
poobah is offline poobah  United States
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Masking tape or duck tape won't establish a line that is truely perpendicular to the tube. The long piece of paper will... if you don't have paper, a piece of kitchen foil will work too.

Following the line with a saw is problem #2. Getting a good line to follow is problem #1.



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