Russell McMahon wrote:
> Jake said:
>
>   
>> I making a motor thats going to be used in a very harsh environment
>> (robot wars). What I'm looking for is a material to cast the 
>> windings
>> in. We are trying to make a pancake style motor with *lots* of turns 
>> of
>> wire on and would like something that will remain structural to at 
>> least
>> about 150C (200C would be better).  Most of the resin's and epoxies 
>> I've
>>     
>
> Filled PTFE is one of the best.
> UHMWPE is well below 150 but better than many.
>
> Selected filled Tufnol composites can be very good.
> ASP brand asbestos Tufnol composite with paper or fabric fill is rated 
> at 165C continuous and 185C intermittent operation.
> *BUT* grade 6G/91 with glass fabric and Polyimide resin is rated at 
> 260/300+ C !!!
>
> Polypropylene    120-160C range
>
> Nylon type 6 *CAST*     177C
>
> Teflon pure        288 C   BUT you'll want  a filler for mechanical 
> aspects.
> Metal filling and perhaps graphite as well can produce a very useful 
> plastic.
>
> Castable and/or machineable ceramics may serve you better.
>
>
>         Russell
>   
Having a look now at the ceramics and they seem good if a bit brittle. 
The Nylon is looking good, the teflon is better but I havent found any 
information on actually getting and casting the stuff, It doesn't look easy.
The ideal would be something like a very hard urithane that didn't start 
softening untill it got to 150C
The other requirement is to be available to the motivated hobbyist ;->
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