Re: [CAD_CAM_EDM_DRO] Re: How to get high-gloss, decorative finishes?

Dave,
The finish you described, was known as "engine turned", and I've
seen it on antique car restorations dating back to the 1920's. It was the
sign of a pretty high class vehicle. It was also used extensively by body
builders who specialized in fire engines. One of the other ways of applying
the circles, is to use a dowel, chucked in a drill press, with abrasive
valve grinding compound applied to the end.

Marv Frankel
Los Angeles

----- Original Message -----
From: "turbulatordude" <davemucha@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, April 11, 2003 7:16 PM
Subject: [CAD_CAM_EDM_DRO] Re: How to get high-gloss, decorative finishes?


> If you remember back in the 50's and 60's aluminum with little rows
> of parallel circules were cool.
>
> chuck a pencil eraser and hold it on a spot to polish, more it 3/4 of
> it's dia and polish the next spot, repeat.
>
> any and every mark you can see with your eyes on unfinished metal
> will have 3 friends when you nickel or chrome it.
>
> for die work with inside radiuse, it was a die grinder, soft
> sandpaper wheels, or stones or increasing smoothness till it was a
> mirror. lapping compound with a stick might go a long way to smooth
> parts, or like you said, tool finsh is cool.
>
> If you have a tumbler or vibrator, you can remove a lot of the finish
> marks with those too.
>
> Dave
>
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "abbylynx" <abbylynx@y...>
> wrote:
> > Hi again,
> >
> > I was wondering if anyone could enlighten me on what methods are
> > employed in order to get smooth, glossy finishes on pieces. In
> > particular, for ornamental type work. What do "those cool jewelery
> > guys" use?
> >
> > The main problem I have is that end-mills leave trails.
> > For flat surfaces, the flycutter does a lovely job, except when
> > multiple passes are required, in which case the concentric circular
> > patterns interfere with each other to create various interesting
> > effects - probably something which if used right could look very
> good.
> >
> > I've seen all kinds of deburring tools, diamond-grid wheels and
> other
> > such things in various catalogs. What type of tools are generally
> > used to polish things up? Or is this best done by hand?
> >
> > Also, how much does any of this really matter if you end up nickel
> > and then chrome plating a part?
>
>
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