[R-390] Any advice for removing sheared machine screws...?

[B. A. Stephens]

One more:

After your notch is cut, give it a sharp whack with an old screwdriver and mallet. The impact may help to crack whatever is bonding the threads in place.

Bryan

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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On Sunday, October 3rd, 2021 at 2:20 PM, B. A. Stephens via R-390 <r-390 at mailman.qth.net> wrote:

> -Soak in penetrating solvent
>
> -When ready to twist apply some heat (e.g., butane microtorch)
>
> -Last resort before more destructive measures: apply tightening torque then reverse to loosen
>
> 73
>
> Bryan
>
> KG4UPR
>
> Sent with ProtonMail Secure Email.
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>
> On Sunday, October 3rd, 2021 at 2:05 PM, Jordan Arndt Outposter30 at shaw.ca wrote:
>
> > Hi group,
> >
> > I'm trying to figure out the best way to try and remove 2 of the 4 machine
> >
> > screws that hold the frequency readout "cover" on a 390A. They were sheared
> >
> > off at some point and there is not enough metal left to get any kind of grip
> >
> > with any kind of tool that I have.
> >
> > I can see that one "stub" has a central divot from a drill bit, and the
> >
> > other is just a mangled down to where it exits the front panel.
> >
> > I will likely try to cut a slot in what's left of the metal with my Dremel
> >
> > tool, and see if I can get enough grip with a small screwdriver to unscrew
> >
> > the remnants, but I have my doubts because I expect they were badly
> >
> > overtorqued and likely held tight in the threads...
> >
> > I have to pull the front panel anyway, so I'll get a look at things from the
> >
> > rear of the front panel when I do that...
> >
> > Any tips or pointers out there...??
> >
> > 73...Jordan VE6ZT
> >
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