So here's a new one. My sister is a jeweler and apparently one of the
machines she uses does some sort of pressing and requires 3" x 3" x
1/4" squares of Kevlar.
Anyway, I told her I would try to cut some with a very expendable saw
blade. Kevlar does not have any metal in it, but does anyone out
1. Is cutting this stuff going to kill my machinery. I used the mitre
saw in the test, but if possible, would cut it on the tablesaw.
2. What kind of blade should I use? I cut it with a 32 tooth carbide
in the mitre saw, but it was a very old blade. There were some sparks
flying, which I assume was from the blade. Would an abrasive blade be
a better idea?
I did a rec search and couldn't find anything. If I am able to cut
this stuff, it would be great for things like a router table insert,
because this stuff won't bend.
Well it is actually fiber woven into strands that is then woven into a
cloth, but like fiberglass matt it can be made into solid very hard sheets.
Thats what I am thinking. Several layers impregnated with a type of resin
then compressed. But it shoudl be able to be cut without difficulty I have a
good bit of Kevlar thread which I can easily cut with scissors but when
woven into cloth and layered it is very strong. A bullet can and will pass
through Kevlar. I know first hand I have a small cal. bullet lodged in the
very last kevlar panel in one of my vests.
as rich said it is used in conjunction with other materials to make it
As I understand it it is the weave that has alot to do with it.
I worked with a guy who helped build some of the first Kevlar Boats for the
Coast Guard. I guess fiberglass boats are built backwards in this case the
paint/epoxy is put in the mold and the Kevlar Fibers are then sprayed on or
something, then the fiberglass.
Kevlar isn't so much bullet proof as bullet resistant. It takes a
tremendous amount of energy to pierce it so that if it does the bullet has
worn down and can no longer continue on its path. That is why you have
varying degrees of vests for different powers of bullets.
"GTO69RA4" < email@example.com> wrote in message
> So here's a new one. My sister is a jeweler and apparently one of
> machines she uses does some sort of pressing and requires 3" x 3" x
> 1/4" squares of Kevlar.
What form is the Kevlar in ? Fabric, or laminated up as a rigid
I sew, and I often sew Kevlar (or aramid, to use the non-brandname).
It's not magic.
If it's fabric, then any large sewing shears will cut it (in single
layers). It's not good for them, so either don't use your best pair,
or get a pair of Kevlar shears (harder edges, PTFE coating). You
don't need ceramic edged shears, they're hugely expensive and yet also
For 1/4" sheet, that's a few layers of Kevlar fabric quilted together.
It sews easily, as it's usually loosely woven.
If it's rigid sheet, then use a hacksaw and a HSS blade (or bimetal
blades are generally better). Wear on the teeth will be rather high,
but it will hacksaw easily enough.
Wow, thanks for the quick responses. Just to clarify, this Kevlar come in
6" x 6" tiles that are 1/4" thick and its very hard. I found a Freud blade
designed to cut Corian type laminates, but that's as close as I got. I'll
try contacting the manufacturer and let everyone know what I find out.
Is the Kevlar by any chance steel mesh reinforced? I have this in a bullet
resistant vest. But the some of the panels in one of my vests are not and
can be seperated then cut with scissors. How compressed is the Kevlar?
Sounds like it is solid too me and I would think that would make it easier
to cut with something high speed. Maybe a dremel tool?
Would think an abrasive wheel/blade would be best, as Kevlar is very
CUT resistant and could jam a toothed blade.
Have you contact the MAKER of the kevlar and asked about what they
On 25 Feb 2004 06:11:51 -0800, firstname.lastname@example.org (WoodChuck34)
My advice - don't use a blade you like
I Just cut holes in some carbon fiber, a 1/8" thick woven mat with
PEEK matrix using a HSS flycutter.
Had to sharpen it about 5 times. Aramid (Kevlar) is also very
abrasive and is likely to put some serious hurt even on carbide.
I've worked with Kevlar rope a little, but that experience won't help
you with the cutting question. The many questions I did have were
quickly answered by Dupont, whose techies are pretty sharp.
email@example.com (WoodChuck34) wrote in message
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