Cristian,
The gears are the same shaft as the roller that is being heated
by the heater. The gears are heated by both radiation and
conduction. Providing a heat shield would cut down on radiated
heat, but the main source is conduction. I suppose that the
mechanics could be changed to extend the shafts with thermally
insulating material. That would place the motor/gear mechanism
outside the case. I am not sure I could identify a thermally
insulating material that would be stiff enough at that temperature
to give the required operation. Metal gears would be much simpler.
Harvey
\ufffdAt 04:33 AM 21-12-16, you wrote:
>
>
>Rob,
>
>Since the recent posts on gears, I have been nosing around ebay
>looking for metal gears.
Why not isolate the plastic gear in a tin box and ventilate it with a
small fan?
Cristian