Re: Note : Pi 2 Zero W Now RIP-OFF Price on Amazon

On 8/8/26 03:01, Carlos E.R. wrote:
> On 2026-08-08 04:48, c186282 wrote:
>> e
>> On 8/7/26 14:01, wmartin wrote:
>>> On 8/7/26 06:10, The Natural Philosopher wrote:
> 
> 
>>>> A late friend had a similar word for pot metal. [Zinc alloy 
>>>> casting]. Can't remember what it was.
>>>>
>>> Don't know about that one. I want to know where to buy "scratch", 
>>> there are so many things that can be made...
>>
>>    In USA, the term "pot metal" has been around for
>>    a very long time. Mostly zinc but with who-knows-
>>    what also mixed in there. It's not a consistent
>>    recipe.
>>
>>    IS good enough for low-stress housings and such
>>    however and easy to cast/machine. Better than
>>    plastic but not as good as decent aluminum or
>>    steel alloy. HAS it's place IMHO.
> 
> I think I have seen motors used in kitchens have very cracked metal 
> housings. Probably this pot metal.

   Very likely - and I've seen such cheap motors before.

   The alloy does not seem very resistant to vibration.
   It's soft enough you'd THINK it would be, but its not.

   Most aluminum alloys and 300 series stainless are
   not super-good with vibrations either - though
   better than 'pot metal'. I've seen 'magnesium' tire
   rims crack too.

   Only steel - esp nearly pure iron - seems to stand
   up to vibration, but it's HEAVY. Some cast iron,
   like that previously used for engine blocks, can
   be pretty good but will fracture on a sharp impact.
   I've seen old cracked engine blocks too.

   Plastics - they start 'crystalizing'/decomposing
   the instant they're made.

   So, alas, nothing 'perfect'. Not sure about titanium
   alloys but they're way too expensive and hard to work
   for most applications. Hey, pure gold doesn't stress
   harden/fracture !  :-)