I use one of these for aluminum tubing, but can you use it on carbon tubes?
Not the best, I’ve used that to score the carbon tube as a guide, then cut with a abrasive hacksaw blade freehand.
Definitely not… Even if you managed to cut it, you could be doing damage the carbon (whether visible or not, eg. delamination). You can use a hacksaw if you’re careful, but the easiest method I’ve found is to use a diamond cutting wheel on a Dremel.
My experience has always been that the standard pipe cutters flair the ends when they are cutting and can splinter the carbon. Better to just use a proper guide and good hacksaw. What also works in a pinch is a dremel with proper cut-off wheel, but is difficult to keep the cut even all around.
My experience has always been that the standard pipe cutters flair the ends when they are cutting and can splinter the carbon. Better to just use a proper guide and good hacksaw. What also works in a pinch is a dremel with proper cut-off wheel, but is difficult to keep the cut even all around.
If you use a dremel type tool be careful not to breath the dust created by the grinding process. It’s extremely bad for your lungs.
At the very least wear a dust mask if not a better respirator. If you use a fine toothed hack saw this won’t be necessary.
Hugh
Second this manner. A hacksaw works quite well and to avoid splintering the carbon fibre tape the cut with masking tape prior to making the cut. If you have a dremel and a good quality mask (something that will stop 3-5 micron particles) then this is also a good method. The only real concern with the dremel method is you are putting fine particles in the air which is a little dangerous and not good at all for the lungs.
Negative ghost rider, those cutters work on pressure to press the blade, pressure will crush the carbon. Hacksaw my friend, hacksaw. Be sure to put a ring of tape around where you are cutting so you avoid the carbon splintering as you cut.
Not the best, I’ve used that to score the carbon tube as a guide, then cut with a abrasive hacksaw blade freehand.
Ditto
32 TPI blade works best
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I cut my carbon cervelo seatpost with a wet tile saw…worked fine and no dust
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Thanks everyone! I am getting the idea that I shouldn’t use the tube cutter. 
I really appreciate the advice.
Might be over kill. But I purchased the Park Tools http://www.amazon.com/Park-Tool-Threadless-Carbon-Composite/dp/B004269BQC/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1321805282&sr=1-1
Use it with a hacksaw several times and works like a charm.
No, it’s not recommended to use it on a carbon tube. You may cause a damage on it. The most appropriate tool that you must use is a hacksaw combined with a guide.
plumbing
Again not recommended, a hacksaw and a guide will do a much better and safer job. The park tools guide can be had for around $30 or a shop should be willing to cut it for you for a little less than that.
Carbon should always be cut with a high speed cut off tool to prevent splintering of the carbon you can ruin a piece by cutting it with a hack saw or pipe cutter
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I use a 4’’ grinder with a .045 cutoff wheel. It cuts like butter.
Hacksaw and park tool guide. brand new never used blade.
taping helps prevent splinters.
if do not recomend using power tools unless you use those sorts of tools regularly.
as for the dust created… sure its bad for you, if you breathed it all day everyday for a long period of time it may be problematic.