Go Back   RCCrawler Forums > RCCrawler General Tech > Tools, and Procedures
Loading

Notices

Thread: Stripped out plastic *Help*

Reply
 
LinkBack Thread Tools Display Modes
Old 05-25-2016, 08:52 PM   #1
Newbie
 
Join Date: Mar 2016
Location: Vancouver
Posts: 5
Question Stripped out plastic *Help*

Not sure if this is me being a total noob, but I've got a problem, see multiple options to fix it, and don't know what is best. I'm also sure that there are more options out there that I'm not thinking of, and I'd love to hear them as well.

I have a few screws that will not tight down on my rig. Obviously this is a problem when bashing around. All of the screws, screw into plastic (otherwise they'd be loctited). So the question as I see it is, what is the best way to over come the plastic stripping so the screws will get snug?

Like I said, I see a few options; these are all listed below.
1) Use loctite on these screws even though they are not going into metal.
--I have the standard blue loctite and have been told to NOT use it on plastic.
2) Use a then CA glue like I would a loctite.
3) Use longer screws.
--I don't think this would work on my rear axle or on the dif housing.

Is there something I'm missing? Is there a better way that I can't think of?

Please help me out here, I can't justify a new axle only because 2 screws will not lighten down.

THANK!
PDX-BC is offline   Reply With Quote
Sponsored Links
Old 05-25-2016, 09:14 PM   #2
I wanna be Dave
 
Join Date: Feb 2013
Location: NW Indiana
Posts: 3,196
Default Re: Stripped out plastic *Help*

Beef tubes...... Use the search function and you will find the vendor on here that sells them.
allanon1965 is offline   Reply With Quote
Old 05-25-2016, 10:14 PM   #3
Newbie
 
Join Date: Mar 2016
Location: Vancouver
Posts: 5
Default Re: Stripped out plastic *Help*

Thanks for the reply, looked into Beef tubes but that doesn't solve the problem.

The axle (AX31044) is just fine except for these two screws won't tighten. The actual axle housing is striped it's original thread.

My goal is not need to purchase a new housing just because of these two screws.
PDX-BC is offline   Reply With Quote
Old 05-26-2016, 08:24 AM   #4
No idea what I'm doing
 
Join Date: Oct 2008
Location: Underground, CO
Posts: 4,529
Default Re: Stripped out plastic *Help*

Where do the screws go and which screws are you using? I see M3 screws being used all the time in plastic, but they really are not meant for this. Is that what you are trying to do?

Pics are always good.
C*H*U*D is offline   Reply With Quote
Old 05-26-2016, 08:48 AM   #5
RCC Addict
 
Join Date: Jan 2016
Location: Kelowna, BC
Posts: 1,274
Default Re: Stripped out plastic *Help*

Option #2, CA as loctite when screws go into plastic.

And/or a larger diameter screw.

Make sure you're using coarse thread and not fine thread in plastic.

I've heard some people have had good results by inserting small pieces of plastic to shim the hole before reinserting the screw with CA but I've never needed to do that.
QuesoDelDiablo is offline   Reply With Quote
Old 05-26-2016, 10:12 AM   #6
I wanna be Dave
 
CODYBOY's Avatar
 
Join Date: Apr 2010
Location: Oakridge
Posts: 3,305
Default Re: Stripped out plastic *Help*

I use these ; McMaster-Carr.

Last edited by CODYBOY; 05-26-2016 at 10:14 AM.
CODYBOY is offline   Reply With Quote
Old 05-26-2016, 11:13 AM   #7
Rock Crawler
 
Join Date: May 2009
Location: Welderville just south of benchviseland
Posts: 634
Default Re: Stripped out plastic *Help*

Sounds like you may be using fine thread metric screws where coarse thread is required...


If you are in fact using coarse thread screws - What I've done before to get me out of a pickle, was poke the end of a toothpick in the hole and clip it off. Then your little coarse thread screw will have something to bite on. Is it a permanent fix? No... But it will get you out of a bind.
Reflektr is offline   Reply With Quote
Old 05-26-2016, 12:42 PM   #8
Custom Carbon Fiber
 
Robbob's Avatar
 
Join Date: Oct 2007
Location: Connecticut :(
Posts: 4,501
Default Re: Stripped out plastic *Help*

Loctite doesn't usually like plastic.
Robbob is offline   Reply With Quote
Old 05-26-2016, 04:09 PM   #9
Pebble Pounder
 
Join Date: Mar 2008
Location: Wallingford, CT.
Posts: 142
Default Re: Stripped out plastic *Help*

Use a two part plastic epoxy, (made for plastic) put some in the threaded hole, (don't fill it to the top unless you want some to run out). Then put the screw and or part back together. Then allow to cure. 24 hours most of the time.
Understand this will never come back apart without breaking it apart.

Also they do make a waterproof epoxy if needed.
ROCKCRUISER is offline   Reply With Quote
Old 05-26-2016, 09:22 PM   #10
Newbie
 
Join Date: Mar 2016
Location: Vancouver
Posts: 5
Default Re: Stripped out plastic *Help*

Thank you all for the help here. Very much appreciated.


The truck is a Yeti XL rtr. From the factory it has fine thread screws throughout the whole rig. -I thought this was different than what I knew from years ago when I had a 1/10scale nitro.

I think I'll use the CA glue to resolve the screw problem.
PDX-BC is offline   Reply With Quote
Old 05-26-2016, 09:27 PM   #11
Pebble Pounder
 
Join Date: Dec 2014
Location: Abq
Posts: 146
Default Re: Stripped out plastic *Help*

He's right... Brass inserts are the only way to go. You'll need a 5/32" drill bit to open up the hole to accept the insert..

Quote:
Originally Posted by CODYBOY View Post
I use these ; McMaster-Carr.
JOEY_P is offline   Reply With Quote
Old 05-27-2016, 12:24 PM   #12
I wanna be Dave
 
Join Date: Sep 2006
Location: Anchorage, Alaska
Posts: 3,099
Default Re: Stripped out plastic *Help*

Beef Tubes or AsiaTees/BoomRacing's Kronic tubes
are the best fix and thread bite retaining the C hubs.
They will require using 3mm machine screws.
^ note:
don't use machine screws that are too long
or they will hit the axle shafts, causing axle bind, when seated fully.


Speaking of 3mm machine screws...
if you haven't already replaced the original wood looking screws.
Often you can switch to the 3mm machine screws
and those will thread in tighter then did the originals.

I do not recommend using Locktite...
because it does not work well with many plastics.

Instead...
I would swap out to the 3mm machined thread screws...
and I would use a small drop of CA on those threads
in the same manner that locktite would be used normally.

Now metal threading into metal...
yeah blue locktite always.
TacoCrawler is offline   Reply With Quote
Old 05-27-2016, 01:08 PM   #13
RCC Addict
 
Join Date: Mar 2008
Location: SSF
Posts: 1,614
Default Re: Stripped out plastic *Help*

You can use the same idea for installing new hinges for cabinet doors in wood.
Insert toothpicks in the wood to take up room for a screw.

So in this case, drill into a scrap piece of plastic with a small drill and catch the chips. Insert the chip in the hole or wrap it around the screw to be used. It works well as a bandaid until you buy a new piece to replace.
JeepinDoug is offline   Reply With Quote
Old 05-27-2016, 01:16 PM   #14
Custom Carbon Fiber
 
Robbob's Avatar
 
Join Date: Oct 2007
Location: Connecticut :(
Posts: 4,501
Default Re: Stripped out plastic *Help*

Quote:
Originally Posted by JeepinDoug View Post
You can use the same idea for installing new hinges for cabinet doors in wood.
Insert toothpicks in the wood to take up room for a screw.

So in this case, drill into a scrap piece of plastic with a small drill and catch the chips. Insert the chip in the hole or wrap it around the screw to be used. It works well as a bandaid until you buy a new piece to replace.

Plastiguage from a auto parts store too
Robbob is offline   Reply With Quote
Reply

Tags
help me



Stripped out plastic *Help* - Similar Threads
Thread Thread Starter Forum Replies Last Post
The ONE plastic gear in the servo stripped... MR2Quick Axial Yeti 8 09-25-2015 12:23 PM
Repairing stripped screw holes in plastic? strap624 Newbie General 7 10-05-2014 06:06 PM
Stripped threads in plastic fix Wehan Newbie General 10 04-29-2013 03:18 PM
Finally stripped plastic gears Santa Cruz Jeff Redcat Crawlers 0 12-28-2010 09:58 AM
Stripped out wheel hexes on plastic beadlocks ReklessOffRoad Tires and Wheels 1 03-07-2008 04:22 PM
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 04:07 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com