[Elecraft] [KX3] Re: Kx2 paddle issue

[Bob McGraw K4TAX]

As I learned from my previous manufacturing experience and knowledge, a 
threaded fastener, a.k.a. screw, has a specific torque value which 
should be applied to make it secure.   The value depends on the screw 
design, flat head, binder head, round head, undercut, pan head, etc.    
The only way to attain this value is to use a torque calibrated 
screwdriver or wrench to secure the fastener.    Also, depending on 
application, the proper lock washer, internal tooth, external tooth or 
split spring should be applied.

Additional measures may be required when the screw is used with 
dis-similar materials.   Hence one of the Loctite products, again 
application specific, may be required.

73

Bob, K4TAX

K3S s/n 10163



On 7/25/2017 8:14 AM, Dave Belville wrote:
> Hi Tom,
>
> First let me say that I am not trying to argue with you or correct you. I
> just want to share what little bit of knowledge I have.
>
> In my many years as a master mechanic in the heavy duty truck industry, I
> can tell you without reservation that unless you use physical force
> (screwdriver, etc.) and turn the screw, it will not come loose from the
> type of use a set of paddles on a KX2 would get and could be considered a
> permanent fix. We used Blue Loctite for countless purposes and I never saw
> it come loose on a truck which would have put many times more vibration,
> stress and possibly heat on the fastener. Now, that being said, you need to
> have the fastener clean but in the case of the KX2 paddles, it should not
> be an issue. I would not recommend using red Loctite. You may not get the
> fastener out even if you want to without destroying something. I know that
> from experience.
>
> As far as the design goes, I would not say it is a lousy design. I would
> say that they just left a step out. They forgot the blue Loctite. Elecraft
> isn't perfect, but they are darn close.
>
> 73
>
> Dave KD9VT
>
>