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Old 2001.12.18, 06:38 PM   #1
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Join Date: Dec 2001
Location: Bristol, England
Posts: 3,610
Exclamation Thread about threads

Lo guys,

Altho' this forum is focussed on hop-ups, it's the most read one of all. Are all Mini-Z owners performace junkies? Yes we are

Anyway, I read about one of the fellow Mini-Z'ers having worn threads somewhere on the main chassis, I think was the ESC cover screw holes or something. He mentioned using longer screws. This is a bit drastic, there is a simple cure.

These worn or stripped threads can be repaired, eliminating the need for longer screws.

What you need is CYANOACRYLATE glue, not all SuperGlue or CrazyGlue is Cyanoacrylate based. Ensure you use a Cyanoacrylate based glue for this repair!!!
I found a product called EVO-STIK and it's sold as "Hard Plastic Adhesive" A Cyanoacrylate based glue is what you need to look for.

Now, I've fixed countless worn chassis threads with this stuff and here's how you apply it:

Pour a little Cyanoacrylate glue on to a piece of paper, take a pin, small precision screwdriver or thin metal object and dip it in the glue you've placed on the paper.
Now place the pin in the hole where the screw went in and coat the outline of the screw-hole. Do this quick, but with the metal pin/object being used to coat the outside of the screw-hole, it wont form that instant bond! (Remove the pin after coating the outside! ) Allow it to dry for a few minutes and repeat the process another 2 to 3 times and allow to dry between each application. When replacing your screws, remember that they only have to be finger tight, if you want to apply torque-wrench logic to any screw on the Mini-Z chassis, then obviously it's gonna strip or wear again.

This should fix most worn screw placement holes on the Mini-Z chassis.

Hope this can help!

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Old 2001.12.18, 07:11 PM   #2
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Re: Thread about threads

Mondo; excellent repair idea. However, to avoid having to repair the threads in the first place, this is how to properly "rescrew" a self-tapping screw:

Once you have screwed a self tapping screw into plastic, it has cut its first threads. After repeated unscrewings and rescrewings, the screw keeps cutting new threads. To avoid this, put the screw on the head of the screwdriver as usual, then place it in the hole, then turn the screwdriver COUNTERclockwise about 1/2 turn to put the screw into the origional threads. You may notice that when you do that, the screw will rise up on the thread, then it will drop down to the established thread. If you pay close attention, you should feel a little "bump", then just screw it down like normal.

Essentially what I do is this: Place the screw into the screwdriver, put the screw on the hole, "unscrew" one turn and then drive the screw down. Takes a tiny bit more time, but it saves time in the long run.

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