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

[B. A. Stephens]

-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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