[Amps] Stuck setscrews

[Alek Petkovic]

Angle grinder or oxy torch.

On 8/12/2017 7:27 PM, Victor Rosenthal 4X6GP wrote:
> I have an older Palstar AT-Auto tuner. It uses stepper motors to turn 
> a rotary inductor and a capacitor. It works very well in my station 
> (or it did).
>
> The motors are connected to the coil and capacitor with semi-flexible 
> insulated couplings that are made out of some kind of plastic strip. 
> The plastic on the one for the capacitor has disintegrated. I have a 
> good quality metal and ceramic coupling to replace it with, but I 
> can't budge the setscrews holding the old one. Allen wrenches twist to 
> no effect.
>
> The screws are held with some kind of glop. I don't think it is 
> Loctite but I don't know for sure. I put some penetrating oil on them 
> and am waiting to see if that works.
>
> I suppose I could drill them out if needed, but that is a last resort 
> because I am afraid of damaging the motor or the capacitor. Any 
> suggestions?
>

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