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Author Topic: Fill holes shallow with bondo? - Threaded Inserts  (Read 183 times)

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nipsmg

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Fill holes shallow with bondo? - Threaded Inserts
« on: May 15, 2019, 01:58:32 pm »
All,

I've got a CP where i Drilled all the way through on accident when tyring to put in threaded inserts.  The inserts are screwed into the bottom of the Panel.  I want to bondo the holes on the top of the board, but am worried about forcing enough bondo down in the holes that it'll make the hole too shallow and have the screw push the bondo back up once dried. 

Any good methods for dealing with this?


Titchgamer

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #1 on: May 15, 2019, 02:20:20 pm »
You could put a small barrier behind the insert so the bondo does not get any further down the hole.

markc74

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #2 on: May 15, 2019, 02:51:14 pm »
Yep. I've done that before too.  ::)

Chuck the screw in the other side as far as it needs to go in and it will act as a barrier. The Bondo wont be able to get past but wont grip the screw enough to stop it from being unscrewed again.

nipsmg

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #3 on: May 15, 2019, 03:05:44 pm »
See I was afraid the bonds would lock the screw in there.  Iíll drop in the screws and go for it.

PL1

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #4 on: May 15, 2019, 03:11:02 pm »
You could put a small barrier behind the insert so the bondo does not get any further down the hole.
+1

Tighten the screw deeper than it will be when the joystick (or bracket?)  is installed.

Use a bit of tape to block the hole.

If you're worried about bondo working past the tape, seal the edge of the tape to the side of the hole with clear nail polish.

If you need clearance above the insert, pack some cotton around the screw to support the tape.  After the bondo dries, you can pull the cotton out through the insert using needlenose tweezers or a hook made of wire.


Scott

jennifer

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #5 on: May 15, 2019, 10:40:46 pm »
I would use a fiberglass reinforced putty such as kitty hair to fill the hole, finish it on the top with regular lite weight, and mill and tap the bottom.

jennifer

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #6 on: May 16, 2019, 11:43:43 am »
Or cover the insert hole with a piece of tape, and fill with epoxy, Something nobody ever talks and out with putty is shrinkage, especially on wood, (due to the moisture content I would guess) and possibly  the humidity in the air when you mix it...Whatever the cause it is a thing, Just last week I filled a hole and every other day (3 times ) it kept  shrinking, and probibally will again 6 months down the road after the paint cures.

Malenko

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #7 on: May 16, 2019, 11:50:36 am »
cover the back of the hole with duct tape. get some bondo in there, let it cure, remove the tape and fill in the rest of the hole. Ive done it that way NUMEROUS times without issue.
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jennifer

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Re: Fill holes shallow with bondo? - Threaded Inserts
« Reply #8 on: May 16, 2019, 11:55:58 am »
 It is a shame that happed at all, and in the future you should try a depth stop gauge, The cheap ones don't really work all that great, only have 1 set screw decresing reliality and might leave marks, But these are truly worth the money, they are quality, (little spendy by comparison however) and  come in different sizes...Worth every penny IMO.  https://www.jamestowndistributors.com/userportal/show_product.do?pid=448
« Last Edit: May 16, 2019, 12:00:48 pm by jennifer »