On 12/1/22 08:52, Les Newell wrote:
I've had best results with abrasives. A Dremel, angle grinder cut-off wheel or CBN wheel should work. I generally use a cut-off wheel and square it up with abrasive paper if needed. No need for internal support if you are gentle. Be very careful of the dust - it does similar things to your lungs to asbestos.

 Is this tube pultruded or laid up? If it's a uniform black it's probably pultruded. If you can see the weave it's laid up. Pultruded tube is very directional. The majority of the fibres are aligned along it's length so it's strong in bending, tension and compression along it's length. Sideways crush loads however will break it easily. If you bolt it down you must use a solid plug to support the walls. Laid up tube is much more expensive but it is stronger and generally more resistant to side crush loads.

Les

That is what this is, laid up. Pretty stuff. If I can control the chop saw slow enough. Straight down chop probably better. I sure wish you could buy a carbide blade that was actually sharp. CBN I have but its too small for anything but a teeny router to spin. Its also gawdawful $$$, That is why my original idea was the chuck it up in a 4 jaw, put the CBN wheel in that die grinder and let the lathe cut it off. I can feed X as slow as .0002" per dial click. And that disk is only .030" thick. I have a teeny router, and when the Saphire-5 printer gets here, I can make a mount to hold it in a QCTH holder. Slow but perfect. Or I could use the die grinder as I already have a mount for it, used it to fix the bent spindles mt5 bore years ago. I can also cobble up a vacuum fitting to collect the dust, which hopefully the best HEPA grade of shop-vac filter will stop.

The chop saws dust bag isn't that effective a collector so I'll skip that test.

Take care & stay well, Les.

Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>



_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Reply via email to