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Old Apr 14, 2010, 10:17 AM
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Pacifica, CA USA
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Cutting Carbon Rods

What's a good way of cutting carbon rods without shattering or splitting it?
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Old Apr 14, 2010, 10:27 AM
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Canada, ON, Hamilton
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i use a dremel with a cutting disk. No shattering or splitting.
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Old Apr 14, 2010, 11:01 AM
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tape the segment you want to cut with masking tape to help prevent splitting. if using a dremel, cut slowly, don't force through or the cutting disk might shatter.
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Old Apr 14, 2010, 11:24 AM
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Carbon shard and carbon dust is like micro fish hook barbs and extremely dangerous because it may never exit the human body.

If you must cut carbon
first tape the segment
then use a hand saw and cut under running water.

Hacksaw blades with 24 or more teeth per inch works best for me.

John
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Old Apr 14, 2010, 11:48 AM
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For rods up to 2 mm I lay the rod on a cutting mat and roll it with a sharp knife. Roll and roll and roll, back and forth You'll get through eventually! The problem with it is that when the cut gets deep the knife is trying to push the rod apart as much as it is cutting down.

I usually keep it wet as well, to avoid the dust, although I doubt these small exposures are dangerous.
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Old Apr 14, 2010, 07:50 PM
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It is extremely unhealthy to use a dremel. CF dust is one of the most dangerous hazards of this hobby. I had to throw my clothes away once until I learned how to do it safely.

Underwater is a little extreme though.

Now I use a fine tooth dollar store hobby saw or coping saw with paper towel to catch the dust. Rotate as you cut and no splinters. Outside is best but indoors ok if you cut slowly.
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Old Apr 14, 2010, 07:54 PM
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the carbon rod i used was 1mm in diameter and i cut it outside. Maybe i got lucky it was like 9 months ago and i feel fine
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Old Apr 14, 2010, 08:03 PM
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My experience with Dremel was not so good... I passed away 2 months ago after a long illness caused by the CF dust.
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Old Apr 14, 2010, 11:03 PM
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That's good to know. Darn it! I just sanded a carbon fiber rod.
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Old Apr 14, 2010, 11:21 PM
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St. Louis MO
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Use a Dremel and their little diamond cutting wheel. Cut in a manner that the dust and tiny (itchy) shards are thrown away from you, wear a dust mask if you want/need to based on the number & duration of your cuts.
This stuff cuts quick, and unless your doing a large batch a few cuts here and there wont make much difference so long as your not down there with you work huffing it.
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Last edited by dashunde; Apr 19, 2010 at 05:48 PM.
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Old Apr 15, 2010, 05:50 AM
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Hacksaw works fine for me. Dremel is OK but dusty so not a method I tend to use.
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Old Apr 15, 2010, 07:51 AM
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Northeastern Illinois
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Guys, I hope some of the humorous remarks in this thread don't lessen the seriousness of lung diseases that can be caused by some of the materials we use. CF, epoxy, foam dust and certain resins used with fiberglass can all have disaterous consequenses if not treated with respect and caution.

All those folks who breathed asbestos felt fine for years until the cancer set in. By then it was too late for anything but suffering.

I left the fiberglass industry 20 years ago. I took reasonable precautions, but have developed sensetivity to certain dusts and chemicals that I hope don't develop into anything else.

IMHO, when you sand or cut anything, at least wear a simple dust mask and eye protection. And what's worse, going "too far" or getting sick? We don't want to be missing any buddies at the next fly-in. Take care.
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Old Apr 15, 2010, 08:56 AM
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In Teh Garage (Rossville, GA. USA)
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This little jewel with a carbon arrow cut off disk works fantastic!
Click On Pic

use a dust mask when cutting CF anything, the dust really is dangerous even more so than asbestos.
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Old Apr 15, 2010, 10:26 AM
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Quote:
Originally Posted by dashunde View Post
Use a Dremel and their little diamond cutting wheel. Cut in a manner that the dust is thrown away from you, wear a dust mask if you want/need to. Otherwise, breath through your nose only.
This stuff cuts quick, and unless your doing a large batch a few cuts here and there wont make much difference so long as your not down there with you work huffing it.
Yeah... right. The dust goes exactly where you tell it to.

I have a medical background and can assure you Potshot is correct when he says CF is more harmful than asbestos. Maybe you will be one of the lucky ones and die years instead of months later.
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Old Apr 15, 2010, 11:22 AM
Usual suspect.
St. Louis MO
Joined Feb 2007
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^Enough with the drama... We're not running cf CNC machine shops here, just the occasional quick cut of cf rod to length for reinforcing something.
While I agree that the stuff is not healthy I'm not inclined to get all spooked by working with it for a few seconds here and there.
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