Plastic hole, metal screw, thread stripped: How to remedy?


Status
Not open for further replies.

DeSwitch

Senior Member
Oct 28, 2005
3,202
0
0
51
1.45N 103.83E
www.flickr.com
#6
Drill out and retap at a larger thread size.
On top of that, can insert a coil like thing to get back to the same tread size. I had forgoten what is that thing called. Looks like a spring coil made of Stainless steeel.

Normally this happens when you overtighten so next time when you tighten a metal screw on plastic, please do not use too much force.
 

LittleWolf

New Member
Jan 23, 2005
1,095
0
0
Singapore
#7
On top of that, can insert a coil like thing to get back to the same tread size. I had forgoten what is that thing called. Looks like a spring coil made of Stainless steeel.
Thread inserts?
 

Del_CtrlnoAlt

Senior Member
Feb 15, 2003
16,268
0
0
Outside the Dry Box.
Visit site
#8
On top of that, can insert a coil like thing to get back to the same tread size. I had forgoten what is that thing called. Looks like a spring coil made of Stainless steeel.

Normally this happens when you overtighten so next time when you tighten a metal screw on plastic, please do not use too much force.
screw thread inserts?

tis is plastic leh...

i think best way is to just do rethreading... wonder y never break...
 

synapseman

Senior Member
May 6, 2003
2,196
0
0
State of Confusion
www.pbase.com
#9
Thanks for the replies, everybody.

So far I've heard about filling the hole up with epoxy, re-drilling and re-tapping, but am not sure if I can pull it off. :p

It's for my 1/10th scale r/c model. The screwholes are quite small, as are the screws used (3x12mm). High-impact crashes places a lot of strain on the plastic chassis so the screw threads also tend to break easily.
 

Hobbesyeo

New Member
Feb 16, 2005
990
0
0
Singapore
www.sxc.hu
#10
Thanks for the replies, everybody.

So far I've heard about filling the hole up with epoxy, re-drilling and re-tapping, but am not sure if I can pull it off. :p

It's for my 1/10th scale r/c model. The screwholes are quite small, as are the screws used (3x12mm). High-impact crashes places a lot of strain on the plastic chassis so the screw threads also tend to break easily.
superglue. :thumbsup:
 

patch17

New Member
Jun 30, 2003
728
0
0
here and there
#11
yes, superglue.

place a drop in the hole then put in the screw. the glue should fill the gap between the metal screw threads and the plastic. once it hardens, it should hold quite well.
 

behyx

Senior Member
Jun 15, 2002
2,642
0
0
35
SG
www.danielbeh.com
#12
Oh can I add a question of something quite similar here? hehehe

I have this external harddisk casing with an internal 80GB harddisk in it.

One of the screw of the external casing has been stripped of it's + sign. Now it's smooth round. Any idea how can i take out the screw? I've brought it to hardware shops but they said to drill another hold into the screw, but it's a dedicate harddisk in it! Any other way to go around doing it? Any advices appreciated. :)
 

Mar 13, 2007
2,252
0
0
Atlanta, GA
#13
Oh can I add a question of something quite similar here? hehehe

I have this external harddisk casing with an internal 80GB harddisk in it.

One of the screw of the external casing has been stripped of it's + sign. Now it's smooth round. Any idea how can i take out the screw? I've brought it to hardware shops but they said to drill another hold into the screw, but it's a dedicate harddisk in it! Any other way to go around doing it? Any advices appreciated. :)
use a dremel or rtx cutting disc, at high rpm, cut in a minus groove

abt 20k rpm there abt should be just a single "touch" job without causing unwanted vibrations.
 

behyx

Senior Member
Jun 15, 2002
2,642
0
0
35
SG
www.danielbeh.com
#16
use a dremel or rtx cutting disc, at high rpm, cut in a minus groove

abt 20k rpm there abt should be just a single "touch" job without causing unwanted vibrations.
Oh where can I find anyone doing such a precision job? Wish to know... or else my external harddisk case is forever bonded to this 80GB hard drive..
 

Mar 13, 2007
2,252
0
0
Atlanta, GA
#17
Oh where can I find anyone doing such a precision job? Wish to know... or else my external harddisk case is forever bonded to this 80GB hard drive..
any hobbyists who modify computer casings and do metal work will be able to help you.

the spinning disc is probably 1.5cm to 2cm in diameter only

but firstly you might have to check if the screws are flushed with the surface, or recessed into the surface, if its recessed, it may not be easy to cut a slot without marring the casing.

the other non cutting way, is to use those high bond epoxys, dab a little epoxy on the screw, shape a minus groove and let it harden/set. when its set, it binds to metal very well and may allow you to unscrew the screw. probably can ask if any bros here have spare epoxy that you can use cuz all you need is a tiny little bit
 

Dec 3, 2004
37
0
0
Bishan
#18
On top of that, can insert a coil like thing to get back to the same tread size. I had forgoten what is that thing called. Looks like a spring coil made of Stainless steeel.

Normally this happens when you overtighten so next time when you tighten a metal screw on plastic, please do not use too much force.

These thread repair inserts are for metal threads and need a certain depth. Need to use a tap to thread the damaged part before you can use the 'thread coil'
 

Dec 3, 2004
37
0
0
Bishan
#20
yes, superglue.

place a drop in the hole then put in the screw. the glue should fill the gap between the metal screw threads and the plastic. once it hardens, it should hold quite well.
Super glue does not adhere to ABS material. Use a self tapping screw with a larger diameter and fix it.
 

Status
Not open for further replies.
Top Bottom