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Grub Screw/ Set Screw

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Old April 16th, 2010, 02:32   #1
kullwarrior
 
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Grub Screw/ Set Screw

Two Questions:

#1 How do you remove a set screw which has been stripped? (I got one where someone use a metric key on a imperial screw...turns out it's stripped now.

#2 Is there any hardware store that sells variety of grub screw? If not any known good online store? (in Canada perferably)
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Old April 16th, 2010, 02:45   #2
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Depending on how small it it, an easy out. I've drilled out small set screws and re-tapped them as well. For replacements, try a bolt supply place. What size is it? I might have one in my stash.
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Old April 16th, 2010, 03:19   #3
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Best thing to do, is to use a dremel and cut a line across the top of the screw. Use a flat head screw driver to remove it.. works like a charm
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Old April 16th, 2010, 04:32   #4
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Originally Posted by turok_t View Post
Best thing to do, is to use a dremel and cut a line across the top of the screw. Use a flat head screw driver to remove it.. works like a charm
that works on larger screws but for a set screw which is usually recessed you will end up chopping up the surrounding surface hehehe, unless it's partially exposed then yeh sure
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Old April 16th, 2010, 04:45   #5
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if its stripped bad, drill it out and re tap.... I have a had a few screws that I just needed to goto a bigger hex bit to get them out but just depends on how bad the strip is
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Old April 16th, 2010, 05:00   #6
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This is why slow patient consideration is required when dealing with small screws.

Drilling out might be your only option. BUUUUTTTT.

However there are other options if you don't wish to damage it.

Such as soldering/gluing a Allen key into the damaged hole.

Or placing a small bit of rubber into the hole before attempting to unscrew it.


Tapping only works when the surrounding of the screw is stronger then the screw, If the screw is in plastic and you drill, be prepared for damage to occur to the surrounding area.

I would suggest you try a small diamiter screw extractor before trying to drill and tap.
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Old April 16th, 2010, 05:28   #7
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what about where to find replacement?
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Old April 16th, 2010, 05:42   #8
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try
http://www.edmontonfasteners.com/

http://www.primefasteners.ca/

or one of these

http://maps.google.ca/maps?hl=en&um=...ed=0CC0QtQMwAw

without an exact size and thread pitch I cannot suggest a suitable replacement location. Or where to order online.
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Old April 16th, 2010, 09:22   #9
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Originally Posted by Rugger_can View Post

Such as soldering/gluing a Allen key into the damaged hole.
I'd glue/JB weld in a hex/allen key.

if it's not too deep that you can access it cleanly, take a hex key and dab a bit of JB kwik on one end, stick it into the stripped grub screw, hold until it holds on it's own and let it cure (4 minutes for JB Kwik) unscrew.

Now if that grub screw is rusted or seized, there's still a good chance that you'll break the JB weld bond but it's worth a shot before drilling it out.
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Old April 16th, 2010, 09:34   #10
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I'd glue/JB weld in a hex/allen key.

if it's not too deep that you can access it cleanly, take a hex key and dab a bit of JB kwik on one end, stick it into the stripped grub screw, hold until it holds on it's own and let it cure (4 minutes for JB Kwik) unscrew.

Now if that grub screw is rusted or seized, there's still a good chance that you'll break the JB weld bond but it's worth a shot before drilling it out.
That works...try to degrease it and get any little metal chips out. Plasticine (kids have tons of it) makes for a quick "third hand" to hold something in place while it sets up....if the screw is messed up in a hole and you can see the screw threads of the hole...you can use some plasticine to "fill" the threads...then pick out the extra and try the JB weld trick. If you get JB weld into the threads...you're done.

Most small/tiny grub screws are so fragile (especially once they're messed up) that you either try to coax the damaged screw out....or resort to drilling it out and retapping the hole.

If you try other bits...some torx bits fit a bit tighter...also some flat head bits might jam in there nice enough to catch whatever's left of the corner of a stripped out hole. With some interchangable bit sets, the bit is tapered...so by grinding down the bit a bit, you can jam the wider flared portion to catch the corners.

Even the smallest micro screw extractor I have would mess up the area surrounding the typical small set/grub screws that I have.
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Old April 16th, 2010, 20:05   #11
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I gave up on it. might as well toss it to the gun doc when I switch inner barrel (using a longer one)

from what I look today, the guy put super glue when he lock screw it the grub screw....sigh..what a pita
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