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How to remove a stripped hex screw on volume knob?

K

Kevin6860

New Member
I recently picked up a Sansui AU-D11 as a gift for my dad and it's all good except for the fact that the nut holding the volume knob is very loose. In order to tighten it I have to remove the little hex screw that holds it in place but it seems like the previous owner tried to get into it and stripped it to a near perfect circle. I really don't want to drill it out as the amplifier is in near immaculate condition and I don't want to cause any unnecessary damage if I don't have to so I wanted to know if anyone has any other ideas to remove the stripped screw.
 
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Reverse twist drill bit..Or left hand drill bit should back out the setscrew..Once removed, you will need to re-tap the threads for a little larger metric setscrew. I have to do this kinda stuff all the time at my day job.
 
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I appreciate the quick response. Looks like this should do the job, I just have to find a set thin enough to fit in the hole for the set screw. Thanks for the help!
 
2nd on the smaller size torx. They are kind of wedge shaped and work well here. If that don't work, go to reverse twist.
 
avionic said:
Reverse twist drill bit..Or left hand drill bit should back out the setscrew..Once removed, you will need to re-tap the threads for a little larger metric setscrew. I have to do this kinda stuff all the time at my day job.
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Then you have the tools and experience to do it.
I’ve never had much luck with easy outs. The hole that needs to be drilled should be dead center and that can be a problem for some of us. And if the tip of the easy out breaks off while turning it then your really screwed,
 
I just have to make a smart-ass comment on easy-outs.
In my experience, it's never "easy" and I rarely get the bolt "out".
I'm guessing though that they probably work better on a volume knob screw than a seized, broken off engine head bolt.
It's a great feeling when they do work though.
 
OBMG74 said:
I just have to make a smart-ass comment on easy-outs.
In my experience, it's never "easy" and I rarely get the bolt "out".
I'm guessing though that they probably work better on a volume knob screw than a seized, broken off engine head bolt.
It's a great feeling when they do work though.
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“Most” people do not drill the broken bolt deep enough. We use them often at work, whether they work or not seems to depend on who is using them :rolleyes:

Edit: and IME they tend to use to small of an extractor
 
How about "Easy Off" oven cleaner...?
I just find products with "easy" in the name a little humorous.
Kevin, good luck with the knob! Always something, isn't there....
 
I've never owned a left handed bit, gotten out countless broken bolts and stripped set screws on machinery.

Sometimes it involves a bit same size as hole for broken bolt so not to mess up threads to level out top of messed up bolt. Then correct size bit for easy out centers itself in that. Tap easy out into drilled hole and remove broken/stripped piece.

I've said I need to try them.
 
Beatnik said:
I've never owned a left handed bit, gotten out countless broken bolts and stripped set screws on machinery.

Sometimes it involves a bit same size as hole for broken bolt so not to mess up threads to level out top of messed up bolt. Then correct size bit for easy out centers itself in that. Tap easy out into drilled hole and remove broken/stripped piece.

I've said I need to try them.
Click to expand...

They are nice on the gas turbines I work on. Really don’t want to jack up the cases trying same size free hand. Majority of the time it comes out without even using the extractor.
 
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