Fixing stripped nylon threading
Fixing stripped nylon threading
Is there any recommendation for repairing parts where the nylon threading has been stripped?
For example, some the threading in my stealth transmission case where it connects to the chassis brace are stripped. The screws hold in ok but if I tighten them too much they loosen up again.
For example, some the threading in my stealth transmission case where it connects to the chassis brace are stripped. The screws hold in ok but if I tighten them too much they loosen up again.
- GoMachV
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Re: Fixing stripped nylon threading
To repair the hole, I have heard of people melting a plastic/nylon of the same type with a chemical- laquer thinner maybe? And using it as a putty to fill the hole. It should "bond" itself well enough to drill out the holes once it hardens. I have not tried this but it sounds like a jb weld type fix and those have always worked for me
Personally I move to a 5-40 or 3mm screw and all is fine
Personally I move to a 5-40 or 3mm screw and all is fine
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- jwscab
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Re: Fixing stripped nylon threading
this also sometimes works:
put oil on the screw threads. apply a dab of medium CA to the damaged hole. apply oiled threads with the intention of leaving the threads in place(ie, don't try this temporarily, do this at the final install of what you are working on.) The glue will form threads, but will also probably stick somewhat to the metal screw threads, hence the oil. the oil gives you a chance of the bond happening to the plastic, more than the metal, for dis-assembly later. this will give you a nice strong threaded joint, but will usually have to be redone again if you take it apart. not something for high strength areas, or something that gets adjusted, like tie rods.
put oil on the screw threads. apply a dab of medium CA to the damaged hole. apply oiled threads with the intention of leaving the threads in place(ie, don't try this temporarily, do this at the final install of what you are working on.) The glue will form threads, but will also probably stick somewhat to the metal screw threads, hence the oil. the oil gives you a chance of the bond happening to the plastic, more than the metal, for dis-assembly later. this will give you a nice strong threaded joint, but will usually have to be redone again if you take it apart. not something for high strength areas, or something that gets adjusted, like tie rods.
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Re: Fixing stripped nylon threading
Dang...that's one tiny helicoil!
It's time to stand up to the bully. Support the companies that support the industry, not the ones that tear it down. Say no to Traxxas
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Re: Fixing stripped nylon threading
I have the same question but for cast metal. I have a gear case with a stripped screw hole. There should be some cement that I could use to fix that I guess?
Re: Fixing stripped nylon threading
For metal the are a few resources on the web I found before asking here. Like here they mention filing the hole with welding then re drilling or using helicoils.AYKBOBCAT wrote:I have the same question but for cast metal.
http://diy.stackexchange.com/questions/16815/how-can-i-fix-a-stripped-hole-in-an-aluminum-piece
For nylon I wasn't sure what to fill with.
Re: Fixing stripped nylon threading
Yeah I was thinking that but not to sure where to get the right kind of plastic or what thinner would work best.gomachv wrote:To repair the hole, I have heard of people melting a plastic/nylon of the same type with a chemical- laquer thinner maybe?
I was thinking job weld might be to hard to properly mesh with the threads. Is that not the case?
So I was thinking maybe filling with some kind of paint and drilling would work.
I was thinking of doing that too. But I am a bit of a purist so using original spec screws would be preferred.Personally I move to a 5-40 or 3mm screw and all is fine
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Re: Fixing stripped nylon threading
a purist would replace the damaged threaded part .shorne wrote: But I am a bit of a purist so using original spec screws would be preferred.
Todd
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Re: Fixing stripped nylon threading
Really? I would rather keep the original part. Maybe I'm not a purist? Maybe just cheapklavy69 wrote:a purist would replace the damaged threaded part .shorne wrote: But I am a bit of a purist so using original spec screws would be preferred.
- THE H.P FREAK
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Re: Fixing stripped nylon threading
HI!... I use these on stripped out RC plastic/nylon parts. They work great.
http://www.tonysscrews.com/category.sc?categoryId=12
http://www.tonysscrews.com/category.sc?categoryId=12
102 RC vehicles and counting...
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Re: Fixing stripped nylon threading
an original replacement part is an original part to most purists. A re-re part will spark an explosion to most purists.shorne wrote:Really? I would rather keep the original part. Maybe I'm not a purist? Maybe just cheap
I can absorb what you are asking/meaning though...I am by far cheap . Many a time to buy a complete car for a part I'm after just to try to revamp my paypal by getting rid of what I don't need after the fact. Getting too lazy as of late though so running outta room
I've done alot of what jwscab mentioned above but without the oil. Just ca'd the screw in. If you have decent tools the steel screws will come back outta the nylon...just have to glue it in again like he mentioned.
Todd
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Re: Fixing stripped nylon threading
If anyone is watching just tell them it's thread locker. Yeah, that's the ticket!klavy69 wrote: I've done alot of what jwscab mentioned above but without the oil. Just ca'd the screw in. If you have decent tools the steel screws will come back outta the nylon...just have to glue it in again like he mentioned.
Todd
It's time to stand up to the bully. Support the companies that support the industry, not the ones that tear it down. Say no to Traxxas
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- klavy69
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Re: Fixing stripped nylon threading
funny you say that, reason for doing it the first time was my threadlocker was dry and didn't want to buy anymore (insert 'cheap' here) so I ca'd my gt's rear bulkhead screw in one side . You might've noticed I said steel screws in my last post...aluminum doesn't let go so nicelygomachv wrote:If anyone is watching just tell them it's thread locker. Yeah, that's the ticket!
Todd
Peace and professionlism.....Kabunga signing off!!!
- DennisM
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Re: Fixing stripped nylon threading
Good luck on welding a 3mm hole shut in old cast aluminumshorne wrote:For metal the are a few resources on the web I found before asking here. Like here they mention filing the hole with welding then re drilling or using helicoils.AYKBOBCAT wrote:I have the same question but for cast metal.
http://diy.stackexchange.com/questions/16815/how-can-i-fix-a-stripped-hole-in-an-aluminum-piece
For nylon I wasn't sure what to fill with.
In Denmark we´ve got something called chemical metal, from PLASTIC PADDING. I.E I´ve used it to repair a broken mount on a clutch housing for 1/1 car.
If proper preparred (cleaned) it will hold.
Gone fishing
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