--===============2926678078335690867==
--001a1147ce382d321705331de3ca
Not sure about materials, but you don't need to shape your cutting tool, IF
you are patient and careful. You can use a thin cutting tool and remove a
very small amount of material from the center of where you want your
groove. Then widen the groove until it is the diameter of the tubing
stock. Then remove a small amount of material from the center of the
groove and then widen the groove until is the width of your stock MINUS the
change in radius for the depth of the groove. You can find the change in
radius buy subtracting the dept of the groove from the width of the stock
and multiplying by 2. Keep doing this and you get a successive
approximation of a half circle groove. The less material you remove in
each pass, the more accurate your radius will be. You can then clean up
with a sanding tool if needed to remove any residual ridges.
____ ____
|_ _|
|_ _|
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On Wed, May 18, 2016 at 7:00 AM, Brad Kahler <bkahler1@gmail.com> wrote:
> I was given one of these tubing benders from Harbor Freight. By
> design it bends flat stock rather well.
>
> http://www.harborfreight.com/compact-bender-38470.html
>
> I now have a need to bend some 5/8" diameter OD 1/16" wall tubing.
> I've been shopping around for dies but the prices I'm finding are
> fairly high for a one time need to make a couple of bends.
>
> I've got a nice 13" South Bend lathe so I'm thinking I should be able
> to fabricate the dies myself. Would a material like Delrin would be
> suitable for the dies?
>
> Assuming I do decide to try and turn the dies myself I would also need
> to figure out how to grind the cutting tool to shape the curve.
>
> I'm looking for suggestions on how to accomplish this task.
>
> Thanks!
>
> Brad
> _______________________________________________
>
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
> Archive: http://www.team.net/archive
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> http://autox.team.net/mailman/options/shop-talk/jdinnis@gmail.com
>
>
--
=================================
= Never offend people with style when you =
= can offend with substance --- Sam Brown =
=================================
--001a1147ce382d321705331de3ca
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">Not sure about materials, but you don't need to shape =
your cutting tool, IF you are patient and careful.=C2=A0 You can use a thin=
cutting tool and remove a very small amount of material from the center of=
where you want your groove.=C2=A0 Then widen the groove until it is the di=
ameter of the tubing stock.=C2=A0 Then remove a small amount of material fr=
om the center of the groove and then widen the groove until is the width of=
your stock MINUS the change in radius for the depth of the groove.=C2=A0 Y=
ou can find the change in radius buy subtracting the dept of the groove fro=
m the width of the stock and multiplying by 2.=C2=A0 Keep doing this and yo=
u get a successive approximation of a half circle groove.=C2=A0 The less ma=
terial you remove in each pass, the more accurate your radius will be.=C2=
=A0 You can then clean up with a sanding tool if needed to remove any resid=
ual ridges.<br><br><br><span style=3D"font-family:monospace,monospace">____=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 ____<br>=C2=A0=C2=A0=C2=A0 |_=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 _|<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 |=
_=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 _|<br>=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 |_ =C2=A0=C2=A0 _|<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 |__|</span><br></div><div class=3D"gmail_extra"><br><=
div class=3D"gmail_quote">On Wed, May 18, 2016 at 7:00 AM, Brad Kahler <spa=
n dir=3D"ltr"><<a href=3D"mailto:bkahler1@gmail.com"; target=3D"_blank">b=
kahler1@gmail.com</a>></span> wrote:<br><blockquote class=3D"gmail_quote=
" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I=
was given one of these tubing benders from Harbor Freight.=C2=A0 By<br>
design it bends flat stock rather well.<br>
<br>
<a href=3D"http://www.harborfreight.com/compact-bender-38470.html"; rel=3D"n=
oreferrer" target=3D"_blank">http://www.harborfreight.com/compact-bender-38=
470.html</a><br>
<br>
I now have a need to bend some 5/8" diameter OD 1/16" wall tubing=
.<br>
I've been shopping around for dies but the prices I'm finding are<b=
r>
fairly high for a one time need to make a couple of bends.<br>
<br>
I've got a nice 13" South Bend lathe so I'm thinking I should =
be able<br>
to fabricate the dies myself.=C2=A0 Would a material like Delrin would be<b=
r>
suitable for the dies?<br>
<br>
Assuming I do decide to try and turn the dies myself I would also need<br>
to figure out how to grind the cutting tool to shape the curve.<br>
<br>
I'm looking for suggestions on how to accomplish this task.<br>
<br>
Thanks!<br>
<br>
Brad<br>
_______________________________________________<br>
<br>
<a href=3D"mailto:Shop-talk@autox.team.net";>Shop-talk@autox.team.net</a><br=
>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=
=3D"_blank">http://www.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums"; rel=3D"noreferrer" target=3D=
"_blank">http://www.team.net/forums</a><br>
alk/jdinnis@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.te=
am.net/mailman/options/shop-talk/jdinnis@gmail.com</a><br>
<br>
</blockquote></div><br><br clear=3D"all"><br>-- <br><div class=3D"gmail_sig=
nature">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=3D Never offend people with style whe=
n you=C2=A0=C2=A0 =3D<br>=3D can offend with substance --- Sam Brown=C2=A0 =
=3D<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
</div>
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_______________________________________________
Shop-talk@autox.team.net
Archive: http://www.team.net/archive
--===============2926678078335690867==--
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