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04-24-2013, 03:33 PM | #1 |
Pebble Pounder Join Date: Apr 2013 Location: Charlotte, Mi
Posts: 149
| Stripped threads in plastic fix
I like everyone have stripped some plastic threads in a brand new axel housing (one holding the diff cover on) and I was wondering how to go about fixing this? I was thinking about filling the hole with jb weld and letting it dry overnight and then drilling it out and then threading the screw back in. Thoughts?
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04-24-2013, 03:48 PM | #2 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: Stripped threads in plastic fix
You could do JB Weld (it "cures", not "dries" since it's basically a 2 part epoxy), just make sure you get it to the bottom of the hole & fill it up. You could also do brass inserts, something like this.... Products - OverkillRC |
04-24-2013, 03:50 PM | #3 |
Quarry Creeper Join Date: Nov 2012 Location: Wapella
Posts: 306
| Re: Stripped threads in plastic fix
I thought there was something on here about using superglue also.
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04-24-2013, 05:05 PM | #4 |
RCC Addict Join Date: Aug 2011 Location: Elkhart
Posts: 922
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Id go with the brass inserts myself first, then maybe jb weld if u didn't do that... The brass inserts look similar to a helicoil and I think that would work great!
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04-24-2013, 05:30 PM | #5 |
Hoof Hearted? Join Date: Nov 2009 Location: Chattanooga
Posts: 655
| Re: Stripped threads in plastic fix
Try using a machine screw instead of the coarse thread screws. A lot of times the fine threads of the machine screw will get a better bite in the plastic.
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04-24-2013, 05:37 PM | #6 |
Rock Crawler Join Date: Aug 2011 Location: Kingsland, GA.
Posts: 544
| Re: Stripped threads in plastic fix
Back when stadium trucks were real popular we always used superglue mixed with sawdust.
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04-24-2013, 05:39 PM | #7 |
Pebble Pounder Join Date: Apr 2013 Location: Charlotte, Mi
Posts: 149
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Since it's been approved and I already have some I'll try jb weld, if it fails I'll try inserts from Mcmaster carr. Btw, it's a 2.5mm machine screw and I'd like to keep it if possible. Last edited by Wehan; 04-24-2013 at 05:46 PM. |
04-24-2013, 05:55 PM | #8 |
RCC Addict Join Date: Nov 2010 Location: England
Posts: 1,603
| Re: Stripped threads in plastic fix
I had similar happen and repaired it with a helicoil kit. They can be bad quite cheap these days.
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04-24-2013, 05:59 PM | #9 |
RCC Addict Join Date: Aug 2011 Location: Elkhart
Posts: 922
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I use heli coils almost everyday at work, we machine alot of parts for VW here in Chattanooga and use the heli coils in the Delrin parts, they work great. I'd try the jb weld since u have it, then if that doesn't work, if check into the bushings or heli coils. Good luck Last edited by 1r3land; 04-24-2013 at 06:36 PM. |
04-29-2013, 11:43 AM | #10 |
Pebble Pounder Join Date: Apr 2013 Location: Charlotte, Mi
Posts: 149
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Finally got this fixed, jb weld did not work AT ALL. "I'm going to fix this dang thing or destroy it trying" price check... $11.00....yup it's a go . I contemplated melting some parts tree plastic and letting it drip into the hole untill it was full but that stuff doesn't melt and drip, it balls up and bursts into flames lol. So I put the screw in the stripped hole, put my Weller 40w on the head and heated untill the head sank about a hairs thickness and pulled the heat , waited about 20 seconds and then backed out the screw and then back in and viola it torqued rite down just like the rest of them! So far so good, if it fails I will update here and let you guys know. |
04-29-2013, 03:18 PM | #11 |
MODERATOR™ Join Date: Jul 2004 Location: Ohio
Posts: 18,928
| Re: Stripped threads in plastic fix
Just put a drop or two of CA (superglue) in the hole first then the screw and let it dry. The glue is melting the plastic and filling the voids.
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