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Old 01-03-2015, 09:01   #16
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Re: Best Practice for Repairing Worn Threads in Wood?

used both toothpick and dowel trick, they both work well
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Old 01-03-2015, 11:57   #17
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Re: Best Practice for Repairing Worn Threads in Wood?

Back the screw out and place a toothpick in the screw hole and retighten the screw by hand, works everytime
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Old 01-03-2015, 12:53   #18
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Re: Best Practice for Repairing Worn Threads in Wood?

Wrap removed screw with 'small stuff'.
Apply white glue to small stuff and reinsert
into hinge screw hole.

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Old 01-03-2015, 13:08   #19
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Re: Best Practice for Repairing Worn Threads in Wood?

I just drill it out the existing hole one size larger, inject with epoxy with a syringe, let it cure then drill out the proper size for the screw which is the root diameter. Stronger than the original screw-in-wood in my experience thus far.

I've done the toothpick thing in a pinch but always go back and redo it with epoxy.
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Old 01-03-2015, 13:27   #20
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Re: Best Practice for Repairing Worn Threads in Wood?

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Originally Posted by Suijin View Post
I just drill it out the existing hole one size larger, inject with epoxy with a syringe, let it cure then drill out the proper size for the screw which is the root diameter. Stronger than the original screw-in-wood in my experience thus far.

I've done the toothpick thing in a pinch but always go back and redo it with epoxy.
The syringes don't last long, as the epoxy cures fast

But I was using epoxy with syringes, just without drilling out the existing holes . . .
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Old 01-03-2015, 13:49   #21
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Re: Best Practice for Repairing Worn Threads in Wood?

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The syringes don't last long, as the epoxy cures fast

But I was using epoxy with syringes, just without drilling out the existing holes . . .
If you have a doctor friend, syringes are very cheap. I treat them as one-use disposable, and usually use longer setting epoxy instead of the 5 minute stuff. I think the longer setting epoxy also bonds with the wood a bit better but that might be wishful thinking.

I think in theory NOT drilling out the existing hole probably gives the epoxy more to hold onto (the old threads in the wood) but I err on the side of making sure the hole is completely filled, which is easier if you drill it out a bit.
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Old 01-03-2015, 14:07   #22
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Re: Best Practice for Repairing Worn Threads in Wood?

Use longer screws


and toothpicks, matches, epoxy, dowel etc if that suits better

But for best practice , grave (sp?) in a new piece of timber of the same type as original and start again - I know not many (none?) of us do this but I do think it is considered best practice.
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Old 01-03-2015, 14:24   #23
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Re: Best Practice for Repairing Worn Threads in Wood?

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The syringes don't last long, as the epoxy cures fast

But I was using epoxy with syringes, just without drilling out the existing holes . . .
I use the syringes from West System and they are reusable because the cured epoxy comes out easily. Here's a couple pictures; the white one is epoxy with white pigment to function as a temporary gelcoat:





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Old 01-03-2015, 17:24   #24
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Re: Best Practice for Repairing Worn Threads in Wood?

Gulfstar, A64pilot, and RWidman,

Thanks -- that never occurred to me. Makes sense though.

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Old 01-03-2015, 17:39   #25
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Re: Best Practice for Repairing Worn Threads in Wood?

screw stripped out? You need a bigger boat.
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Old 01-03-2015, 19:07   #26
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Re: Best Practice for Repairing Worn Threads in Wood?

No toothpicks or match sticks, they are very very soft wood. The pro method is known as a "sweetnail", as opposed to a treenail (trunnel). Just take a block of timber which matches the finish, ie teak or what have you, about 3" x 3" x 4" is good, and kerf it on a band saw in a closely spaced grid pattern with a taper to it. Then chop the blunt end off in a chop saw. This gives you a few dozen sweetnails, which are about 3" long and taper from about match thickness to about triple that. They are also square, not round, which is key. Dip them in 5 min epoxy (I like G5), and then gently hammer them in to the screw holes which need retapping. You are hammering a square peg into a round hole-the hole will conform, locking the sweetnail in place. This is the same reason treenails are not made round, but octagonal. For larger diameter holes, you just trim some of the front off of the sweetnail, matching the diameter of the taper to the diameter of the hole. This leaves less nail proud to trim off after the glue cures. This is done same as you would trim a bung, but is trickier as you are trimming end grain. A japanese flush trim saw is excellent here. Sweetnails done properly will dissapear much better in a finish too, as they leave a very small diamond shaped joint, as opposed to a circle, which draws the eye. Super fast and easy to do once you've got the method down.
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Old 02-03-2015, 09:15   #27
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Re: Best Practice for Repairing Worn Threads in Wood?

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screw stripped out? You need a bigger boat.

I think Canibul is 100% right!
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Old 02-03-2015, 10:12   #28
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Re: Best Practice for Repairing Worn Threads in Wood?

Doweling is the best way, epoxy is very hard for screw threads, glue in the dowels and re drill, as good as new.


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Old 02-03-2015, 11:49   #29
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Re: Best Practice for Repairing Worn Threads in Wood?

As always I find it hard to argue with Minaret, but I would suggest using wood glue instead of epoxy for this. G5 helps solve the problem because it has a little flex to it, but epoxy is brittle and cracks, while wood glue is much softer and takes screws better. Certainly stay away from WestSystems ect.
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Old 03-03-2015, 01:11   #30
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Re: Best Practice for Repairing Worn Threads in Wood?

I've had good sucess with saving the sawdust from some teak (or similar) wood I have cut. I keep a little bag of this around in my box of assorted fix-it things. Then I mix the sawdust with wood glue and fill the screw hole with it and let it dry.

Now you just drill a pilot hole and reinsert the screw - this is better than a dowel and will hold virtually forever.
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