[R-390] Bristol set screws

[Bob Camp]

Hi

The gears are attached to the shafts with the same kind of set screws.  
Some gears see a *lot* of torque. Having one set screw on the knobs  
and another on the gears is a real mess.

Bob


On Jan 4, 2008, at 2:51 AM, Chris Kepus wrote:

> Thanks to those who responded to my inquiry.
>
> OK...Here's what I got out of the responses:
>
> Stick with the Bristol set screws primarily because *IF* the correct  
> size
> Bristol wrench is used, the amount of torque that can exerted without
> damaging (or ruining) the set screw socket is likely to be higher  
> than with
> allen sockets /wrenches.
>
> Whew!  I am surprised that it would take that much torque to tighten  
> set
> screws so the knobs wouldn't slip when turning them.  No wonder  
> about the
> tales of anquish from those who are unable to remove a knob or shaft
> connector due to the galling on the shaft caused by too much  
> torque !!??  I
> haven't dug deep enough into my 390A yet to experience a switch or  
> control
> knob that needs a lot of torque to twist.
>
> Thanks es 73,
> Chris
> W7JPG
>
>
>
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