Homebrew PCBs

On Tue, 23 Nov 2004 21:35:51 -0000, Bengt <tecnoconsult@...> wrote:

>
> Hi Stephan,
> I have the flex shaft and I was planning to use this in my CNC
> driller but I have changed my mind about it. 1= it gets VERY hot so
> if you are going to use it for longer time drilling you must provide
> good cooling for the handpiece. I have not tested to see how warm the
> shaft is though. 2=I think the best way to apply the motor/shaft is
> haning the motor above your drill press. This flex shaft is very good
> but is *limited* to *normal* hobby use and that means short interval
> usage, othervise be prepared to buy some extra BB:s as they will wear
> due to overheating.
> Bengt
> ps. havent had time to finish my fuser yet, but soon I hope....


I do not understand why the handpiece should get warm.
It has the same BBs as the minidrill, i don't think it is normal for bbs  
to get significantly
warm?

If the shaft itself heats up due to tosion i might just use the headpiece  
alone.
I can not machine a spindle in BBs that has low enough runout, at least i  
have no idea how
i would do it. I have some nice DC motors from aerospace/mil applications  
which i'd like to use as a motor.

ST