Re: 16 finish on 316 .187 4" square plate



John wrote:

I am about to try to get a 16 finish for electroplate on 316 sst. 3/16 thick
plate. So far I have machined 1" x 6" strip to be cut into 1" squares where
I used a fly cutter which I sanded and buffed that worked ok. The larger
plate I am sure will be difficult so I am asking for some pointers please.


John:

The easiest thing to do is what Charlie said. Have it double disk
ground and then lapped. But if you MUST do it inhouse some things you
might try are surface grinding it (blocking it and flipping it
repeatedly to try to achieve flatness). You could try using some double
back tape to hold it down while machining (holding it in a vise will
tend to bow a 4" piece that is only 3/16" thick). You could clamp it to
the table and machine half of it then move the clamps and machine the
other half. Sometimes a large flycutter will impart enough heat into
the part to bow it, one way around that is to use a smaller cutter with
multiple passes.
Anyway, those are just a few options to try.

--
BottleBob
http://home.earthlink.net/~bottlbob
.

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