[rescue] Making SS20 drive brackets

[Michael Schiller]

Shawn:

While they'll only use about $1.00 of resin, what is the cost of making the
mold going to be? I know that with cast iron, cast steel, etc. the mold (or
pattern as they're called in the casting world) is one of the most expensive
parts. In fact we decided to make an investment casting of one of our parts,
and the mold for it cost $5000, but then the parts were really cheap after
that.

Another thing, a typical production run for any type of casting is usually at
least 100 of them, with real price breaks coming in at the 1k range.

the particular part we made as an investment casting (aka lost wax casting) had
been made in Japan for the last 35 years or so, but their prices were going up
too, so we were able to make 500 casting (including the mold), install a small
machine shop, and machine half of the castings for less than we would had to
pay for 100 of them from Japan!

-Mike

Shawn Wallbridge wrote:

> Since this came up. I was wondering how much demand their is for SS5/SS20
> drive brackets. I have been looking for some, but they all seem to go for
> $15 on eBay, which seems a little high to me.
>
> I mentioned it to a guy at work and he has a CNC mill and makes resin
> models. He said to bring one in and he would look at it to see what it would
> take to make some. I showed it to him last week and he said they would be
> easy to make. And he figures he can make a mold in less than a day. Once I
> had the mold, I could make as many as I wanted. He estimated that it would
> take about $1 of resin to make one. Even if I sold them on eBay for $10
> (which I wouldn't) I could make quite a bit.
>
> What do you guys think?
>
> shawn
>
> -----Original Message-----
> From: rescue-admin at sunhelp.org [mailto:rescue-admin at sunhelp.org]On
> Behalf Of Bill Bradford
> Sent: Friday, May 03, 2002 10:32 PM
> To: geeks at sunhelp.org; rescue at sunhelp.org
> Subject: [rescue] wanted: SS20 drive brackets
>
> I need a couple of SS20 drive brackets..
>
> Bill
>
> --
> Bill Bradford     | "Fear leads to anger. Anger leads to hate.
> mrbill at mrbill.net | Hate leads to using Windows for mission-critical
> Austin, TX        | applications." -- What Yoda *meant* to say
> _______________________________________________
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue

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