Re: Machining G10, machinist opinion

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Original poster: "Chip Ford" <chipford@xxxxxxxxxxxx>

dont make the press over a thou or two. the g10 will split. a .001 press
will be ok i think. g10 will tap pretty good. might want to go at the holes
at an angle instead of directly over the top of it. might also consider
grinding a small flat or even a ring aroung the tungsten althought that
ain't gonna be easy. as for making it round, i would say rough it out on a
band saw and drill your hole pattern in the middle you intend to use. make
up something that matches that pattern that will chuck in a lathe and go to
town a little at a time. Where i work I would rough it on the cnc mill and
then true it up on the lathe. g10 is not fun to machine. it is messy and it
stinks. i would leave as much as I could on the edge. I would think at the
very min. 1/2". that might be pushing it. lotta mass there.. I sure would
like to have some of that tungsten you are talking about...Chip..


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, November 27, 2006 7:44 PM
Subject: Machining G10, machinist opinion


> Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
>
> Hello All,
>
> I have a 18"x 18" x 5/8" of G10 I took to my machinist who can make
> about anything.  I could use some feed back on machining techniques to
pass on.
> My first one was (12" x1/2") I made myself.  Cutting this is the
> first. This one is much more massive and will have 1/2 " tungsten x
> 2.3 (12) pressed in. The feedback I got earlier was to make the holes
> .001 smaller and press the tapered tungsten in. How far from the edge
> would be wise? The set screw method directly into the G10 will hold
> them in place (I hope).
>
> This will be on a variable asrg gap maybe up to 400 bps or > than or so.
>
> Thanks,
> Jim Mora
>
>
>
>