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Cutting a Carbon Steerer(11 posts)

Cutting a Carbon SteererColorado Ron
Aug 1, 2002 12:45 PM
What tool did you use?
A credit card -nmSnowBlind
Aug 1, 2002 12:58 PM
You use a special "blade" for your hacksaw thatbill
Aug 1, 2002 1:10 PM
is designed to cut composite materials as well as metal, plastic, and whatever. Carbide blade, I think it's called. It's basically a cable covered with chips of, I guess, carbide, whatever that is, and it goes through composites like a hot blade through warm butter.
Some folks measure everything and then cut (removing the steerer from the bike), but then you are risking having calculated the dimensions incorrectly. Some advocate just setting the headset, stem, and spacers up, removing about 2.5 mm of spacer and hacking away. I tried this, and the inevitable slip will scratch up whatever it is you're leaning on.
What I decided to do the last time I did it was to follow yet another tip. I set up the headset, the stem, the spacers as I wanted and drew a line around the steerer. Then I removed a couple of cm of stuff, put a little protection around the stuff left (carboard or a rag -- I forget what I used), and wrapped a hose clamp (any hardware store, about $.50) around the steerer as a guide. Worked great. Then just use a fine grain sandpaper to take off any burrs.
Thanks for the excellent info Bill (NM)Colorado Ron
Aug 1, 2002 1:21 PM
re: Cutting a Carbon SteererEric_H
Aug 1, 2002 3:55 PM
I have had a success using a high quality 32 tpi (teeth per inch) hacksaw blade on the carbon steerers I have cut. Despite a moderate amount of searching, I could never find a composite-specific blade.

I wrap the steerer with masking tape at the cutting zone and I use a fork cutting guide (Park). The masking tape theoretically will help prevent any fibres from being "peeled away".
re: $2 cutting guideThirtyFive
Aug 1, 2002 5:16 PM
use a 1 cm headtube shim (or larger if you can find one as you will want to hold it while cutting). the masking tape mentioned above will help hold it in place. good luck
Nice Idea!!grzy
Aug 3, 2002 8:08 PM
I like your inginuity. didn't really want to buy the special guide and had been contemplating this one for a while. Was thinking of using my miter saw on it.....ah, the brutality!
I thought that I might have trouble finding a carbide blade, butbill
Aug 1, 2002 6:51 PM
I found one in the first neighborhood hardware store that I looked. Was about $5, if I remember correctly.
I could not find a special Wire blade long enough...Colorado Ron
Aug 2, 2002 11:40 AM
to fit my hacksaw, so I just used the fine tooth blade. No problems with this and it turned out great. Nice Idea Thirty Five, using the headtube shim.
Thanks all for your ideas.
re: Cutting a Carbon SteererAkirasho
Aug 2, 2002 5:37 PM
... this is a saw I purchased at Lowes. It was advertised as being suitable for several composite materials including acrylics and carbon fiber tubing.

I use it with a Park saw guide and have had no problems (Reynolds forks) with tearout. A quick rub with 600 grit wet/dry sandpaper used dry smooths up the cut.

We abide.

Remain In Light.
re: Cutting a Carbon SteererSim
Aug 3, 2002 6:38 AM
after cutting the carbon fiber tube I apply a bit of epoxy resin , and wait a few hours to apply 1000 or 1200 sand paper. this way the tube ending seems ok, and smooth and it won't tear out.