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.
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.
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.
The easy way to draw a line on any size tubing is to use something that slips over the tube and trace around. Of course you wont be able to find any fittings so cut 6-12in off one end (slit it full length) and use the uncut end of this piece as a "straight edge", tape it on and draw the line. Then measure the thickness of the blade and the distance from blade to edge of jigsaw base(if your using a jigsaw) place the good edge of the sonotube this combined distance from the cut line and you have the worlds first circular fence.
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