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How to create epoxy threads

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Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Fri Dec 05, 2008 2:08 am Post subject: How to create epoxy threads

Hi,

I am using a composite cover inside of the doors to cover the lock and door handles mechanics.

I now face the issue that I need to have threads in between the door shelfs to screw the cover to the door.



Nutplates won't work since I do not have access. I read about rivnuts but I'd like to use epoxy and make the thread myself.

Any ideas? How did you do it?

Michael

_________________
RV-10 builder (flying)
#511

dlm46007(at)cox.net
Guest

Posted: Fri Dec 05, 2008 3:43 am Post subject: How to create epoxy threads

Create a hard point. Use a small diameter stub of pipe. PVC? Fill with putty

(epoxy,fibers and cabosil). Lastly drill and tap. 



--

dlm46007(at)cox.net
Guest

Posted: Fri Dec 05, 2008 3:44 am Post subject: How to create epoxy threads

If dopr is thick enough already just drill and tap. 



--

bhughes(at)qnsi.net
Guest

Posted: Fri Dec 05, 2008 5:00 am Post subject: How to create epoxy threads

I am using aluminum rivnuts in several places to attach the Flightline

Interior panels. Easy to install, lightweight and non-locking so you can

continue to use the same screw after removal. 



Bobby

40116  



--

indigoonlatigo(at)msn.com
Guest

Posted: Fri Dec 05, 2008 7:12 am Post subject: How to create epoxy threads

Hardwood dowels would work will too. Drill out a hole C cut dowel to length C glue in.



Not likely you will be removing the screws enough that the threads will wear with the screws.





[quote] From: dlm46007(at)cox.net

 To: rv10-list(at)matronics.com

 Subject: RE: How to create epoxy threads

 Date: Fri C 5 Dec 2008 04:40:21 -0700

partner14

Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas

Posted: Fri Dec 05, 2008 8:38 am Post subject: How to create epoxy threads

Can't understand why noone has suggested just floxing or micro-ballooning in an odd shaped piece of aluminum.  The odd shape will keep it from spinning, and drilling and tapping is simple.

 Don



--- On Fri, 12/5/08, John Gonzalez <indigoonlatigo(at)msn.com> wrote:



 [quote]From: John Gonzalez <indigoonlatigo(at)msn.com>

Subject: RE: How to create epoxy threads

To: "RV 10 group" <rv10-list(at)matronics.com>

Date: Friday, December 5, 2008, 7:10 AM



   #yiv1920014348 .hmmessage P { margin:0px;padding:0px;} #yiv1920014348 { font-size:10pt;font-family:Verdana;}  Hardwood dowels would work will too. Drill out a hole, cut dowel to length, glue in. 



 Not likely you will be removing the screws enough that the threads will wear with the screws.

 



 



[quote] From: dlm46007(at)cox.net

 To: rv10-list(at)matronics.com

 Subject: RE: How to create epoxy threads

 Date: Fri, 5 Dec 2008 04:40:21 -0700

 

 --> RV10-List message posted by: "David McNeill" <dlm46007(at)cox.net>

 

 Create a hard point. Use a small diameter stub of pipe. PVC? Fill with putty

 (epoxy,fibers and cabosil). Lastly drill and tap. 

 

 --

_________________
Don A. McDonald
40636

ricksked(at)embarqmail.co
Guest

Posted: Fri Dec 05, 2008 10:33 am Post subject: How to create epoxy threads

It's really just as easy to make up the flox, no need for any metal. The epoxy/flox mixture drills and taps very nicely. I did embed a 1" dowel into my doors for a pull down strap though. 

Rick S. 

40185

---

LarryRosen

Joined: 16 Jan 2006
Posts: 415
Location: Medford, NJ

Posted: Wed Dec 31, 2008 9:09 am Post subject: Re: How to create epoxy threads

You could use a click bond bushing with a threaded center.



See them at <http>



Larry Rosen

#356

_________________
Larry Rosen
#40356
N205EN (reserved)
<http>

nukeflyboy

Joined: 05 Jan 2008
Posts: 162
Location: Granbury, TX

Posted: Sat Jan 03, 2009 5:29 am Post subject: Re: How to create epoxy threads

Depending on how much depth you have to work with you could use threaded inserts.  Available at Lowe's Aviation Supply in the misc hardware drawers you can find 2 types of inserts.  One presses in and is held with barbs (for use in wood) and the other screws in.  This would give a little stronger hard point if you don't want to tap an epoxy wad (though that may be the easiest solution).

_________________
Dave Moore
RV-6 built and sold
RV-10 built and flying

pascal(at)rv10builder.net
Guest

Posted: Sat Jan 03, 2009 6:38 am Post subject: How to create epoxy threads

Being my cover for the door handle and lock is rather light I simply drilled 

7/64 into doors and used the screws to make the tap. 5x 6R6 screws and the 

panel is held fine and appears secure. I think the door has enough depth 

around the handle to be strong enough to hold a few screws. If it fails 

later in life I'll do more at that point.

Pascal

--------------------------------------------------

From: "nukeflyboy" <flymoore(at)charter.net>

Sent: Saturday, January 03, 2009 5:29 AM

To: <rv10-list(at)matronics.com>

Subject: Re: How to create epoxy threads



 	  Quote: 	
		   



 Depending on how much depth you have to work with you could use threaded 

 inserts.  Available at Lowe's Aviation Supply in the misc hardware drawers 

 you can find 2 types of inserts.  One presses in and is held with barbs 

 (for use in wood) and the other screws in.  This would give a little 

 stronger hard point if you don't want to tap an epoxy wad (though that may 

 be the easiest solution).



 --------

 Dave Moore

 RV-6 flying

 RV-10 QB - cabin top/fiberglass hell





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 22530#222530

Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Mon Jan 05, 2009 7:40 am Post subject: Re: How to create epoxy threads

Thank you for all your answers!



One questions remains open though, if I just have lets say a 3/16 hole how will I get epoxy/flox through it to make a nice base in the inside of the door. Just pressing it through the hole won't do the job.



Michael

_________________
RV-10 builder (flying)
#511

greghale

Joined: 10 Jan 2007
Posts: 91
Location: Tulsa, Oklahoma

Posted: Mon Jan 05, 2009 7:55 am Post subject: Re: How to create epoxy threads

My armrest are larger than normal armrests.  I need a solid attachment of the armrest to the door.  I thought about rivnuts and epoxing aluminum inserts in the door.  I came up with a simple attachment that is very solid for my armrest.  I used a scrap piece of aluminum and attached three nutplates on the back side.  Dremeled clearance holes in the door for the nutplates.  I then expoxied and flush riveted the aluminum piece to the door.  I plan on adding a strap in the middle of my door below my armrest for pulling the door down and shut when latching the door.  This attachment provided me with a very solid attachment point.



Greg...

door_armbrace.jpg

Description:

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23.89 KB

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_________________
Greg Hale rv10 -- N210KH
www.nwacaptain.com

pascal(at)rv10builder.net
Guest

Posted: Mon Jan 05, 2009 8:14 am Post subject: How to create epoxy threads

Michael;

I built a lock on one door and built a cover for the handle and lock. All 

that is holding the fiberglass piece is 6R6 screws. I noticed that when I 

applied flox (just slightly thinner than peanut butter) it was enough to 

fill the hole and slightly drip (without breaking off) down. When I drill 

the 7/64 hole and use the screws to tap the hole the flox is giving it a 

little more space to grip onto. it is strong enough that I am unable to move 

the cover nor the screws. I really don't think anything stronger is needed 

for my application, which is simply a light cover that really should not 

need to be removed often.

With the 3/16 hole I think filling it with flox might give you the same 

effect, just make sure it is more like peanut butter, another option if your 

looking for filling the area around it is flip the door upside down; use a 

syringe to squeeze the flox into the hole, cover the hole/flox with plastic; 

let it set. the gravity will cause the flox to spread around the area 

depending on how thin the flox is  will determine how much is spreads, of 

course.

Pascal



--------------------------------------------------

From: "Michael Wellenzohn" <rv-10(at)wellenzohn.net>

Sent: Monday, January 05, 2009 7:40 AM

To: <rv10-list(at)matronics.com>

Subject: Re: How to create epoxy threads



 	  Quote: 	
		   

 <rv-10(at)wellenzohn.net>



 Thank you for all your answers!



 One questions remains open though, if I just have lets say a 3/16 hole how 

 will I get epoxy/flox through it to make a nice base in the inside of the 

 door. Just pressing it through the hole won't do the job.



 Michael



 --------

 RV-10 builder (engine, prop, finishing)

 #511





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 22957#222957

partner14

Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas

Posted: Mon Jan 05, 2009 9:48 am Post subject: How to create epoxy threads

Pascal, I've also created covers for the inner door hardware.  I made up some wing spacers that I will JB weld onto the flat portion of the door hardware.... then drill and tap the wing points to hold the cover plates.  I'll snap some pics today.  Also put a lock on the pilot side door.

 Don McDonald



--- On Mon, 1/5/09, pascal <pascal(at)rv10builder.net> wrote:



  	  Quote: 	
		  From: pascal <pascal(at)rv10builder.net>

Subject: Re: Re: How to create epoxy threads

To: rv10-list(at)matronics.com

Date: Monday, January 5, 2009, 8:13 AM



 	  Quote: 	
		  --> RV10-List message posted by: "pascal"

<pascal(at)rv10builder.net>



Michael;

I built a lock on one door and built a cover for the handle and lock. All that

is holding the fiberglass piece is 6R6 screws. I noticed that when I applied

flox (just slightly thinner than peanut butter) it was enough to fill the hole

and slightly drip (without breaking off) down. When I drill the 7/64 hole and

use the screws to tap the hole the flox is giving it a little more space to grip

onto. it is strong enough that I am unable to move the cover nor the screws. I

really don't think anything stronger is needed for my application, which is

simply a light cover that really should not need to be removed often.

With the 3/16 hole I think filling it with flox might give you the same effect,

just make sure it is more like peanut butter, another option if your looking for

filling the area around it is flip the door upside down; use a syringe to

squeeze the flox into the hole, cover the hole/flox with plastic; let it set.

the gravity will cause the flox to spread around the area depending on how thin

the flox is  will determine how much is spreads, of course.

Pascal



--------------------------------------------------

From: "Michael Wellenzohn" <rv-10(at)wellenzohn.net>

Sent: Monday, January 05, 2009 7:40 AM

To: <rv10-list(at)matronics.com>

Subject: Re: How to create epoxy threads



 	  Quote: 	
		   --> RV10-List message posted by: "Michael Wellenzohn"

<rv-10(at)wellenzohn.net>
	


 	  Quote: 	
		   

 Thank you for all your answers!

 

 One questions remains open though, if I just have lets say a 3/16 hole how

will I get epoxy/flox through it to make a nice base in the inside of the door.
	


Just pressing it through the hole won't do the job.

 	  Quote: 	
		   

 Michael

 

 --------

 RV-10 builder (engine, prop, finishing)

 #511

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p 22957#222957

 

 

 

 

 

 

 

 

 

 

 


	




	
	


         [quote][b]

_________________
Don A. McDonald
40636

glastar(at)gmx.net
Guest

Posted: Mon Jan 05, 2009 10:45 pm Post subject: How to create epoxy threads

Hello Michael,



depending on where it is and what load you want to spread onto the shell 

you can do following approach to create another hard point. Lay the 

shell onto the back, drill your 3/26 hole, use a L shaped hard wire, 

where the shorter leg is around 1/2 inch long, use your drill fix the 

longer leg in the chuck. Enter through the 3/16 inch hole and start your 

drill, the short leg will remove the foam between the inner and outer 

shell, move it up and down to get all of it removed and blow it out with 

dry air. You know created a 1" hole between the shells which you can 

fill with the peanut butter (flox-epoxy) push it in there and let it 

cure. This large hard point can  hold up quite a bit of load.



Let me know if you need a hands on, was close to your shop December 30th 

and missed you there ;o)



Werner



Michael Wellenzohn wrote:

 	  Quote: 	
		   



 Thank you for all your answers!



 One questions remains open though, if I just have lets say a 3/16 hole how will I get epoxy/flox through it to make a nice base in the inside of the door. Just pressing it through the hole won't do the job.



 Michael



 --------

 RV-10 builder (engine, prop, finishing)

 #511





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 22957#222957

pitts_pilot(at)bellsouth.
Guest

Posted: Tue Jan 06, 2009 5:24 am Post subject: How to create epoxy threads

I use an allen wrench in place of the bent wire ...... If I can bend the 

'L' in the wire without it cracking, it doesn't seem to stand up to the 

torque.

Linn

Werner Schneider wrote:

 	  Quote: 	
		   



 Hello Michael,



 depending on where it is and what load you want to spread onto the 

 shell you can do following approach to create another hard point. Lay 

 the shell onto the back, drill your 3/26 hole, use a L shaped hard 

 wire, where the shorter leg is around 1/2 inch long, use your drill 

 fix the longer leg in the chuck. Enter through the 3/16 inch hole and 

 start your drill, the short leg will remove the foam between the inner 

 and outer shell, move it up and down to get all of it removed and blow 

 it out with dry air. You know created a 1" hole between the shells 

 which you can fill with the peanut butter (flox-epoxy) push it in 

 there and let it cure. This large hard point can  hold up quite a bit 

 of load.



 Let me know if you need a hands on, was close to your shop December 

 30th and missed you there ;o)



 Werner



 Michael Wellenzohn wrote:

> 

> <rv-10(at)wellenzohn.net>

>

> Thank you for all your answers!

>

> One questions remains open though, if I just have lets say a 3/16 

> hole how will I get epoxy/flox through it to make a nice base in the 

> inside of the door. Just pressing it through the hole won't do the job.

>

> Michael

>

> --------

> RV-10 builder (engine, prop, finishing)

> #511

>

>

> Read this topic online here:

>

> http://forums.matronics.com/viewtopic.php?p 22957#222957

>

>

Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Tue Jan 06, 2009 11:47 am Post subject: Re: How to create epoxy threads

Thanks guys! I understand now what to do.



Werner, I am back now from Austria and finalize the panel.



Cheers

Michael

_________________
RV-10 builder (flying)
#511

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