Gluing phenolic

Waht is the best way to glue two piece of phenolic together?

Dan, U.S. Air Force, retired

Earlier, (B2431) wrote:

Waht is the best way to glue two piece of phenolic together?

I've never had to glue chunks of phenolic together. But I have glued
phenolic to fiberglass (both epoxy and polyester resin) to form
reinforcing pads where composite structure meets steel structure. For
that I always scarf the edges of the phenolic to an included angle of
about 30 degrees, and I always sand or grind the phenolic to take the
shiny finish off of it.

There are some pictures on this Web page of me bonding in the phenolic
reinforcements for a test control stick installation:

http://www.hpaircraft.com/center_sti...e_26_march.htm

And here's some pictures of a composite wing spar with Garolite
reinforcements where the main pin bores will be:

http://www.hpaircraft.com/hp-24/update_4_dec_02.htm
http://www.hpaircraft.com/hp-24/update_21_march_04.htm

As far as what's the best way to join phenolic parts together, I guess
it depends on what specific kind of phenolic you're using (These days
I mostly use Garolite G10, which I'm not sure you'd really call
"phenolic"). And also what kinds of loads you're trying to transfer
through the glue joint. I can't give you much general advice there -
the only things I know that work are the things I've tested.

I hope that helps some.

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com/hp-24

(B2431) wrote in message ...
Waht is the best way to glue two piece of phenolic together?

Dan, U.S. Air Force, retired


In my experience the best way to glue phenolic together is with AN3-X.
Most if not all of the epoxy resins we homebuilders use bonds poorly
to phenolic. Drilling holes in the phenolic fitting and using cotton
flox in the resin as a kind of composite rivet makes for a useable
structure. Think encapsulation rather than bonding.
=====================
Leon McAtee
Q builder

(Leon McAtee)
Date: 6/9/2004 7:14 PM Central Daylight Time
Message-id:

(B2431) wrote in message
...
Waht is the best way to glue two piece of phenolic together?

Dan, U.S. Air Force, retired


In my experience the best way to glue phenolic together is with AN3-X.
Most if not all of the epoxy resins we homebuilders use bonds poorly
to phenolic. Drilling holes in the phenolic fitting and using cotton
flox in the resin as a kind of composite rivet makes for a useable
structure. Think encapsulation rather than bonding.
=====================
Leon McAtee
Q builder

I am building and LED indicator lamp holder. I have a 3/8" and a 1/8" phenolic.
I want to glue/epoxy them together to make 1/2" thick. Using your idea of
encapsulation how would I do this?

Dan, U.S. Air Force, retired

Think encapsulation rather than bonding.
=====================
Leon McAtee
Q builder

Thought you were thinking about structural things like rudder
hinges.....

For what your considering - I think - just sand well with something
like 120 grit sandpaper and use any good epoxy. Whack it with a
hammer and it will probably break at the epoxy/phenolic surface but
for holding LEDS it should be just fine.


I am building and LED indicator lamp holder. I have a 3/8" and a 1/8" phenolic.
I want to glue/epoxy them together to make 1/2" thick. Using your idea of
encapsulation how would I do this?

Dan, U.S. Air Force, retired